~wolf
Wed, Aug 7, 2002 (19:31)
#601
mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm
~MarciaH
Wed, Aug 7, 2002 (22:52)
#602
* Investigation Casts Light on the Mysterious Flying Black Triangle
http://www.space.com/businesstechnology/technology/black_triangle_020805.html
They are big, black, and triangular. In UFO folklore they are proof-positive that planet Earth is a rest stop for joyriding, but road-weary, extraterrestrials.
* Brown Dwarfs Born Like Stars, Study Shows
http://www.space.com/scienceastronomy/brown_dwarfs_020805.html
In size and mass, brown dwarfs fit somewhere between stars and planets. While they are too small to start or sustain the nuclear reactions that characterize stars, unlike planets they do create internal energy that's detectable to astronomers. In how they are formed, though, scientists believe brown dwarfs are more like stars.
* Closet Star Cluster: The Obscure Coat Hanger Star Pattern
http://www.space.com/spacewatch/coat_hanger_020802.html
One of the most pleasing sky sights through binoculars or a small telescope can be found nearly overhead in our late evening midsummer sky. With the Moon out of the way this week, it is a good time to seek it out.
-----------------------------------
Today in SpaceFlight:
* NASA Officials Set Plan for Resuming Shuttle Flights
http://www.space.com/missionlaunches/sts112_update_020802.html
Plans to repair tiny cracks within the space shuttle fleet by welding them and resume flying by late September or early October were formally approved by NASA program officials as expected on Friday.
* 'Picky' Inspector Might Have Saved Shuttle Program
http://www.space.com/missionlaunches/sts_ap_020801.html
Did a 27-year-old with perfect vision and admitted pickiness help prevent disaster on the space shuttle?
* NASA's Robotic Return Mission to the Moon
http://www.space.com/missionlaunches/robotic_moon_020801.html
Scientists have called for NASA to mount a robotic return mission to the far side of the moon to collect samples from the solar system's own "big dig" - the oldest and deepest impact crater basin known. This giant site is known as South Pole-Aitken Basin.
------------------------------------
Today in Business/Industry:
* Finmeccanica Purchases Marconi Mobile, Telespazio
http://www.space.com/spacenews/
Finmeccanica, Rome, has acquired defense communications company Marconi Mobile and satellite service provider Telespazio in separate transactions, the Italian aerospace and engineering group announced Aug. 2
~aa9il
Fri, Aug 16, 2002 (13:52)
#603
Hi all - now this sounds like extreme moonbounce!
73 de Mike
From the ARRL web page
Amateurs Invited to Listen for Radio Signals Bounced Off Asteroid (Aug 15, 2002) -- Amateur Radio operators have been invited to listen in as scientists bounce radio signals off an asteroid that's about to make a "flyby" of Earth. The so-called 2002 NY40 asteroid will come close enough to Earth that it will be visible to sky watchers using binoculars. But because asteroids reflect but a tiny fraction of the light that strikes their surface, a team at the Arecibo Radio Observatory in Puerto Rico will attempt to "ping" the satellite with radio signals as it approaches Earth.
"We will be transmitting about 900 kW with 73 dB of gain towards the
asteroid," Mike Nolan of the Arecibo Radio Observatory told ARRL. "The
transmitted signal will be such that the received signal comes back centered
at 2380.0000000 MHz at the ground station we're aiming for--usually either
Arecibo or the Green Bank Telescope." Nolan said the signal would be either
CW or phase-coded at a bandwidth of up to 20 MHz. "We will be transmitting
most of the time when the asteroid is within 20 degrees of zenith at Arecibo
on August 15-20."
~wolf
Mon, Aug 19, 2002 (10:43)
#604
,,,,,,
~MarciaH
Mon, Aug 19, 2002 (14:04)
#605
Thanks for testing this topic, Wolfie. I cannot think why it is continuing to show new activity when there has been none.
~terry
Mon, Aug 19, 2002 (16:32)
#606
The Voyagers, aren't they amazing. Still beaming back and they're way beyond Pluto. Still giving us great data. This is NASA's wisest inventment of all times.
~MarciaH
Mon, Aug 19, 2002 (16:47)
#607
Absolutely correct about the bang for the buck ratio with Voyager. It was brilliant and surpasses anything they anticipated. Kudos!
~terry
Tue, Aug 20, 2002 (04:52)
#608
They're sending us data now about the very outer region of our solar system. The sun, to the Voyagers I and II must be a tiny little orb. They running a 25 watt transmitter, less than I use in my mobile rig around Austin. I wonder when they're power will finally go cold?
~MarciaH
Tue, Aug 20, 2002 (22:16)
#609
I recall their mentioning that a backward look at Pluto would be the last they expected to hear from Voyager. I also wonder how long their little batteries will last though it was expected to be long enough to maintain the memory for anyone in future worlds to download. Good luck if they did it on 8-track tape and they are using some sort of super digital mode.
~MarciaH
Tue, Aug 20, 2002 (22:17)
#610
The latest from NASA's Earth Observatory (08/20/2002)
-----------------------------------------------------------------
New Features:
http://earthobservatory.nasa.gov/Study/
* The Migrating Boreal Forest
http://earthobservatory.nasa.gov/Study/BorealMigration/
Since the last ice age, forest species across North America have migrated back and forth across the continent. At one point cold-adapted species such as spruce lived as far south as the Gulf Coast. Comapred to past climate fluctations, current warming is happening very rapidly, and modern forests may be unable to migrate or adapt fast enough to keep up. Large nature reserves that encompass different climatic zones may increase forests' genetic diversity and increase the chances that forest species can adapt and migrate in response to cliamte change.
* Fish Kill in the Gulf of Oman
http://earthobservatory.nasa.gov/Study/oman
When fish began dying in droves off the coast of Oman, local media reported it was due to contaminated ballast water from a U.S. tanker while authorities feared that a toxic algal bloom was to blame. Neither was true. Using data from NASA's Terra and SeaWinds missions, a team of scientists demonstrated the fish kill was due to a series of natural environmental changes.
--------------------
Natural Hazards:
http://earthobservatory.nasa.gov/NaturalHazards/
* Latest Events:
Fire: Widlfires and Haze over Borneo
http://earthobservatory.nasa.gov/NaturalHazards/natural_hazards_v2.php3?img_id=4703
Fire: Fires along Lena River near Yakutsk
http://earthobservatory.nasa.gov/NaturalHazards/natural_hazards_v2.php3?img_id=4699
Fire: Fires and Deforestation in Brazil
http://earthobservatory.nasa.gov/NaturalHazards/natural_hazards_v2.php3?img_id=4695
Fire: Fires Scorch Oregon
http://earthobservatory.nasa.gov/NaturalHazards/natural_hazards_v2.php3?img_id=4696
Fire: McNalley and Pines Fires in California
http://earthobservatory.nasa.gov/NaturalHazards/natural_hazards_v2.php3?img_id=4697
Storm: Typhoon Phanfone
http://earthobservatory.nasa.gov/NaturalHazards/natural_hazards_v2.php3?img_id=4698
Volcano: Eruption of Pago
http://earthobservatory.nasa.gov/NaturalHazards/natural_hazards_v2.php3?img_id=4700
Flood: Flooding on Elbe River
http://earthobservatory.nasa.gov/NaturalHazards/natural_hazards_v2.php3?img_id=4701
Flood: Flooding along Danube River
http://earthobservatory.nasa.gov/NaturalHazards/natural_hazards_v2.php3?img_id=4702
Unique Imagery: Black Water off the Gulf Coast of Florida
http://earthobservatory.nasa.gov/NaturalHazards/natural_hazards_v2.php3?img_id=4689
Storm: Tropical Storm Cristobal
http://earthobservatory.nasa.gov/NaturalHazards/natural_hazards_v2.php3?img_id=4688
--------------------
In the News:
http://earthobservatory.nasa.gov/Newsroom/
* Latest Images:
The Migrating Boreal Forest
http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=10295
Floods in Germany
http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=10294
Contrail Web over the Central Rh�ne Valley, Eastern France
http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=10293
Still Watching for the Next El Ni�o
http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=10292
Lena River Delta
http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=10291
Biscuit Fire, Oregon from NASA�s New Satellite�Aqua
http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=10290
Cloud Arcs in the Western Pacific
http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=10289
New Land Cover Classification Maps
http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=10288
* NASA News
http://earthobservatory.nasa.gov/Newsroom/NasaNews/
- Instrument Aboard NASA's Aqua Satellite Joins Twin to Begin Comprehensive Global Coverage
* Media Alerts
http://earthobservatory.nasa.gov/Newsroom/MediaAlerts/
- Songbird Population Declines Linked to Acid Rain
- Air Pollution Cleansed Through Ocean Cloud Processes, Say Hebrew University Scientists
* Headlines from the press, radio, and television:
http://earthobservatory.nasa.gov/Newsroom/Headlines/
- Oceans May Help Clean the Air
- Terra Satellite Refines Map of Global Land Cover
- Global Warming Threatens Ocean Ecosystems
- Scientists Cautious About Global Warming Link to Flood Disasters
- El Nino Blamed for Weather Chaos
- Asian Haze Poses �Widespread Threat�
- Plankton Loss Potential Threat to Seas, Climate
- NASA: Eastern U.S. Smokeout in Early July Set Record
- Jet Contrails Leave Their Mark on Climate
- Global Warming is Changing Tropical Forests
- Satellite Sees Through Smoke to Help Track Wildfires
- Wildfires May be a Taste of Global Warming
- West Nile Will Sweep Across Whole US
- Satellites Reveal A Mystery Of A Large Change In Earth�s Gravity Field
- Monsoon Intensity Increasing as Earth Warms
~MarciaH
Tue, Aug 20, 2002 (22:21)
#611
Today on SPACE.com -- Tuesday, August 20, 2002 -- http://www.space.com/
In today's issue:
/-------------------------------------
Capture the Solar System with the Coolpix System!
http://www.nikoncoolpix.com/
-------------------------------------/
Featured Space Store Product
* Astronaut Ice Cream
Science/Astronomy:
* SPECIAL REPORT: 2002 Leonid Meteor Shower
* Behind the Pictures: Top 10 Voyager Facts
* Mars-like Lab Conditions Support Life
SpaceFlight:
* Vigil for CONTOUR Spacecraft Continues
* New Image Gallery: Voyager's Photo Legacy
* Astronotes: Lance Bass Given Until August 23 to Produce Payment for ISS Trip
Business/Industry:
* Spot Names Replacement for Departing Chief Executive
Plus...
* SpaceTV, SpaceWatch
* Solar and Space Weather
* Starry Night, TeamSETI
* Space Age Jobs
-----------------------------------
Featured Space Store Product
* Astronaut Ice Cream
http://www.space.com/spaceagegear/
Just what you need after a hard day on orbit! Just kick back and enjoy this freeze dried ice cream while the planet gently spins below you. Everyone loves this one! (one serving)
-----------------------------------
Today in Science/Astronomy:
* SPECIAL REPORT: 2002 Leonid Meteor Shower
http://www.space.com/spacewatch/leonids_2002.html
Fast on the heels of the summer Perseids, it's time to look ahead to the current king of meteor showers, the Leonids. While the 2002 peak on Nov. 19 won't equal last year's stunning display, it will still be a remarkable storm that even casual skywatchers should not miss. Unless you plan to wait for 2033.
* Behind the Pictures: Top 10 Voyager Facts
http://www.space.com/missionlaunches/top10_voyager_020820-1.html
Looking back over the 25 years since the first Voyager launch on Aug. 20, 1977, the twin spacecraft are remembered first and foremost as our emissary eyes in deep space.
* Mars-like Lab Conditions Support Life
http://www.space.com/searchforlife/mars_conditions_020819.html
A laboratory experiment simulating conditions on Mars found that certain terrestrial microorganisms called methanogens can survive in extreme Mars-like conditions involving low air pressure.
-----------------------------------
Today in SpaceFlight:
* Vigil for CONTOUR Spacecraft Continues
http://www.space.com/missionlaunches/contour_vigil_020819.html
The CONTOUR mission team clings to the hope they'll hear from the still-silent comet probe. The spacecraft is now more than 1.3 million miles (2.1 million kilometers) from Earth.
* New Image Gallery: Voyager's Photo Legacy
http://www.space.com/php/multimedia/imagegallery/
Younger generations might think of the twin Voyagers as two way-out-there spacecraft. But space buffs from the 70s and 80s remember Voyager for its unbelievable stream of pictures.
* Astronotes: Lance Bass Given Until August 23 to Produce Payment for ISS Trip
http://www.space.com/news/astronotes-1.html
The Russian space agency has given 'N Sync singer Lance Bass five days to come up with payment for a trip to the international space station this fall, a spokesman said Monday.
------------------------------------
Today in Business/Industry:
* Spot Names Replacement for Departing Chief Executive
http://www.space.com/spacenews/
Spot Image Corp. of Chantilly, Va., has tapped veteran company executive Neal Carney to replace Gene Colabatistto as its chief executive officer.
------------------------------------
* SpaceTV:
http://www.space.com/php/multimedia/spacetv/
* SpaceWatch:
http://www.space.com/spacewatch/
* Space Age Jobs
http://www.spacejobs.com/
* Uplink: Share your opinion!
http://uplink.space.com/
-------------------------------------
SOLAR and SPACE WEATHER (August 20, 2002)
3-Day Solar Forecast
Solar activity is expected to be moderate to high. Region 69 has the potential for major flare activity.
3-Day Aurora Forecast
Earth's geomagnetic field is expected to be quiet to active with a chance of isolated minor storming. Active levels are expected Monday. Quiet to unsettled conditions are expected Tuesday and Wednesday.
Solar Data
The current sunspot number is 308, and the solar wind speed recently clocked in at 505 kilometers per second.
The solar wind density was 8.4 protons per cubic centimeter.
(Speed and density values are snapshots in time and change during the day.)
http://www.space.com/spacewatch/space_weather.html
~MarciaH
Wed, Aug 21, 2002 (18:02)
#612
A s t r o A l e r t
Sun-Earth Alert
Solar Terrestrial Dispatch
http://www.spacew.com/astroalert.html
21 August 2002
02:00 UTC (10 pm EDT)
HEADS UP! AURORA MAY BE VISIBLE IN NORTH AMERICAN MIDDLE LATITUDES
Auroral activity is becoming visible across many middle latitude regions
at the time of this writing - for North American observers. The latest
unconfirmed sighting is from New Hampshire, reporting brief tall rays and a
diffuse glow to the north.
A middle latitude auroral activity watch was issued several hours ago,
but a posting here was held off until we could ascertain that conditions
would hold up. It appears the Earth is imbedded in a stable solar wind stream
capable of producing enhanced substorm activity. This disturbance is related
to another coronal mass ejection disturbance thought to have originated from
active sunspot complex 10069.
Happy hunting!
/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/
MIDDLE LATITUDE AURORAL ACTIVITY WATCH
WATCH ISSUED: 20:30 UTC, 20 AUGUST 2002
/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/
VALID BEGINNING AT: IMMEDIATELY
VALID UNTIL: 19:00 UTC (3 pm EDT) ON 21 AUGUST
HIGH RISK PERIOD: 20 AUGUST (UTC DAYS)
MODERATE RISK PERIOD: 20-21 AUGUST
PREDICTED ACTIVITY INDICES: 25, 15, 14, 12 (21 AUGUST - 24 AUGUST)
POTENTIAL MAGNITUDE OF MIDDLE LATITUDE AURORAL ACTIVITY: LOW TO MODERATE
POTENTIAL DURATION OF THIS ACTIVITY: MAIN BELT = 12 HOURS
MINOR BELT = 12 TO 24 HOURS
ESTIMATED OPTIMUM OBSERVING CONDITIONS: NEAR LOCAL MIDNIGHT
EXPECTED LUNAR INTERFERENCE: MODERATE
OVERALL OPPORTUNITY FOR OBSERVATIONS FROM MIDDLE LATITUDES: FAIR TO POOR
AURORAL ACTIVITY *MAY* BE OBSERVED APPROXIMATELY NORTH OF A LINE FROM...
WASHINGTON STATE TO IDAHO TO NORTHERN WYOMING TO SOUTH DAKOTA TO NORTHERN
IOWA TO NORTHERN ILLINOIS TO NORTHERN INDIANA TO NORTHERN OHIO TO
PENNSYLVANIA TO DARK-SKY SITES OF NEW JERSEY.
ACTIVITY *MAY* ALSO BE OBSERVED APPROXIMATELY NORTH OF A LINE FROM...
ENGLAND TO NORTHERN BELGIUM TO NORTHERN GERMANY TO NORTHERN POLAND TO
LITHUANIA TO SOUTHERN LATVIA TO NORTHERN RUSSIA. NEW ZELAND AND EXTREME
SOUTHEASTERN REGIONS OF AUSTRALIA MAY ALSO OBSERVE PERIODS OF ACTIVITY.
SYNOPSIS...
A second very mild shock presumeably from activity associated with
Region 10069, arrived at the Earth near 15:48 UTC on 20 August. The
disturbance started out with a northward turning of the IMF. However, over
the last 2 hours, the IMF has swung toward a more southward orientation.
Isolated moderate to strong high latitude substorming is currently being
observed. These conditions may provide some dark-sky middle latitude
observers with a chance to glimpse periods of auroral activity over the next
12 hours - provided solar wind conditions remain favorable.
This watch will remain valid through 19:00 UTC (3 pm EDT) on 21 August.
It will then be updated or allowed to expire. For updated information, visit:
http://www.spacew.com/aurora/forum.html
PLEASE REPORT OBSERVATIONS OF AURORAL ACTIVITY TO:
http://solar.spacew.com/submitsighting.html
Observations reported here are permanently recorded for future study and
are immediately made available in real-time to a large network of observers
world-wide via the Internet, e-mail and pager. If you observe activity, your
assistance to contribute to this database would be appreciated.
A FREE trial of the space weather "SWIM" software package is now
available at: http://www.spacew.com/swim. Use it to monitor current
conditions. It may also be used to monitor any image resource you find on the
Internet (including almost any type of 'cam' or "pictures of the day" you
can find).
** End of the AstroAlert Bulletin **
~MarciaH
Fri, Aug 23, 2002 (22:14)
#613
PLUTO EVENTS PERPLEX ASTRONOMERS
The last two months have been good ones for Plutophiles. In July a U.S.
Senate subcommittee fortified NASA's budget with $105 million to continue
work on the New Horizons mission, which could be launched toward the
distant planet as soon as 2006. And during the past five weeks telescopes
have captured the passage of Pluto in front of not one, but two faint
stars. Although analysis of the stars' brief disappearances has only
begun, it is already clear that observing teams from the United States and
Europe have come to very different conclusions about the state of Pluto's
atmosphere.
During the first event, on July 20th (Universal Time), Pluto's shadow
crossed South America and, unfortunately, barely missed passing over a
string of major observatories in the Andes. The only "hits" came from
astronomers with portable setups: Marc Buie and Oscar Saa used a 14-inch
Celestron and a CCD camera near the small Chilean town of Mami�a, while
Francois Colas had a video-equipped 12-inch telescope a little farther
north near Arica. According to Bruno Sicardy, who coordinated the European
effort, seven other ground teams in Chile, Ecuador, Peru, and Venezuela
were either clouded out or experienced technical difficulties. Fortunes
improved for the August 21st occultation, as the broad path passed over
observatories in Hawaii and the Far West....
http://SkyandTelescope.com/news/current/article_718_1.asp
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
FIRST VIEW OF MARS IN X-RAYS
On July 4, 1997, Mars Pathfinder helped humanity see the red planet in a
whole new light. Exactly four years later, astronomers again saw Mars
anew, when Konrad Dennerl (Max Planck Institute for Extraterrestrial
Physics) pointed the Chandra X-ray Observatory at Mars and obtained the
first ever X-ray image of our rusty neighbor.
The realization that Mars has a high-energy glow is not surprising. Venus,
Jupiter, Earth, Saturn, and even comets shine (albeit faintly) in X-rays.
And, as with those bodies, the source is fluorescing oxygen atoms. Near
heights of 80 kilometers in the Martian atmosphere, solar-wind particles
strike oxygen atoms with enough energy to tear away their electrons. But
these ions soon recombine with other electrons and return to their
original, unexcited state, emitting X-rays in the process....
http://SkyandTelescope.com/news/current/article_715_1.asp
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
ASTEROID FLYBY SEEN WORLDWIDE
From Uzbekistan and the Crimea to the UK, across North America, and on to
Hawaii, amateur astronomers around the world had fine views of the close
flyby of asteroid 2002 NY40 during the evening of August 17-18, 2002.
The experience of David Nance (Huntsville, Alabama) was typical of the
many reports received at Sky & Telescope. He wrote: "I found 2002 NY40
easily and followed it for about 30 minutes. It was very bright (I'd
estimate it at magnitude 9.5), and it was really spectacular sailing
through the eyepiece, changing the patterns I formed with it and the
framework of stars. My wife thought it was neat since it was so obviously
not a 'fixed' star ... it looked a lot like a slow moving satellite on a
really weird trajectory...."
http://SkyandTelescope.com/observing/objects/asteroids/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
CONTOUR'S FATE LOOKS "BLEAK"
Although efforts to reestablish contact with the Contour spacecraft
continue, mission managers now suspect that the craft was destroyed during
a rocket firing on August 15th. Convincing evidence came from images
acquired by the Spacewatch telescope about 20 hours afterward, showing two
objects separated in the sky by about 460 kilometers and located some
460,000 km from Earth....
Mission mananger Robert W. Farquhar and his team received the Spacewatch
image in response to a call to professional and amateur astronomers to
help locate the spacecraft. The image shows a pair of 18th-magnitude
objects, one approximately three times brighter than the other. According
to David W. Dunham, head of the mission-design team, the objects were then
within 0.6 degrees of where Contour would have been if on its correct
interplanetary trajectory, and their positions suggest that Contour's
solid-fuel STAR-30 rocket motor provided about 3 percent less total thrust
than expected. Dunham estimates that "Contour A" and "Contour B" are
moving apart at roughly 6 meters per second (14 miles per hour). It is not
yet clear what the two pieces might be. "The spacecraft was built around
the STAR motor," Dunham notes, "and they weren't supposed to separate...."
http://SkyandTelescope.com/news/current/article_712_1.asp
=========================================================================
HIGHLIGHTS OF THIS WEEK'S SKY
* Last-quarter Moon on August 30-31.
* Comet SWAN is low in the eastern sky around the time morning twilight
begins for observers in the Northern Hemisphere. Look for it with
binoculars.
* Venus is low in the west-southwest in early twilight.
For details, see This Week's Sky at a Glance and Planet Roundup:
http://SkyandTelescope.com/observing/ataglance/
=========================================================================
PREVIEW THE 2003 NIGHT SKY (Advertisement)
SkyWatch '03: Your Annual Guide to the Night Sky!
Jupiter, Saturn, and especially Mars will light up the night sky next
year. What better way to observe them than with a new telescope. Compare
82 different scopes in the new Telescope Buyer's Guide section of SkyWatch
'03. Also included in this annual publication are articles on how to use
your telescope, 16 months of evening star charts (starting with September
2002), and more! Order your copy today.
http://SkyandTelescope.com/campaigns.asp?id=62
~MarciaH
Fri, Aug 23, 2002 (22:14)
#614
Today in Science/Astronomy:
* Three Small Constellations: The Dolphin, the Fox and the Arrow
http://www.space.com/spacewatch/little_constellations_020823.html
Between and around the three great constellations of the Summer Triangle (Lyra, the Harp; Cygnus, the Swan, and Aquila, the Eagle), there are three little ones.
* Antarctic Sea Ice Increases over Past Two Decades
http://www.space.com/scienceastronomy/antarctic_020822.html
In a surprising departure from other findings that point to a warming planet, a NASA researcher has found that the amount of ice in the Antarctic increased from 1979 to 1999, as measured by satellites.
* Evidence for Oldest Meteor Impact Tied to Two Continents
http://www.space.com/scienceastronomy/earliest_impact_020822.html
A cosmic impact thought to have occurred about 3.5 billion years ago was so incredible it covered the entire Earth with ejected material and generated ocean waves that soared more than half a mile high (1 kilometer) when they reached the shore.
* Moon Seen As Nuclear Waste Repository
http://www.space.com/news/nuclear_moon_020822.html
As the debate rages over using the Yucca Mountain as a burial ground for thousands of tons of radioactive material, a better site for unwanted nuclear waste holds its mute vigil in the skies above the Nevada desert: the Moon.
~tsatsvol
Tue, Sep 3, 2002 (02:55)
#615
Sun gives up secrets
The huge ejections contain twisted solar material
The Sun spits out huge bubbles of super-hot electrified gas.
The solar eruptions blast out into space at speeds thousands of times faster than Concorde.
Sometimes they can even disrupt the Earth's magnetic field, leading to power black-outs.
They are also behind the most dramatic spectacle in the sky - the northern (and southern) lights.
The colourful light shows happen when solar eruptions strike the region of space shielded by our planet's magnetic field.
But despite their impact on Earth, it is not known exactly how the Sun spews out the giant bubbles of gas, known as coronal mass ejections (CMEs).
Now UK astrophysicists have found new clues. They think twisted magnetic fields deep within our star could be the driving force.
The evidence comes from data gathered by the SOHO and Yohkoh satellites.
Twisted structures
Twists within the Sun's magnetic field were studied by a team at the Mullard Space Science Laboratory (MSSL) in Surrey.
One theory is these twisted structures are caused by the Sun rotating faster at the equator than the poles, says Dr Lucie Green of MSSL.
But the new study, carried out with colleagues in France and Argentina, suggests a second option is more likely.
"The magnetic field doesn't get twisted enough by the differential rotation that happens on the surface," Dr Green told BBC News Online.
"The implication is that the magnetic field must get twisted deep within the Sun itself."
Scientists hope it will one day be possible to predict when the Sun is likely to emit CMEs as part of space weather forecasts.
"Prediction of space weather is still a long way off but our research is helping us understand why CMEs happen in the first place," says Dr Green.
Source: BBC NEWS
John
~MarciaH
Tue, Sep 3, 2002 (17:38)
#616
That is an amazing photograph. I was hoping it would be posted by one or the other of us.
Space Power
This month Science@NASA will publish a series of stories about the
technology of space exploration--and what advances in technology are
needed to send human and robotic explorers across the solar system.
Today's installment, the first, is about space power.
FULL STORY at
http://science.nasa.gov/headlines/y2002/03sept_spacepower.htm?list89800
~MarciaH
Sat, Sep 7, 2002 (14:53)
#617
More aurora for us to hunt for:
Aurora Alert: Saturday, Sept. 7th
Space Weather News for Sept. 7, 2002
http://www.spaceweather.com
AURORA WARNING: A solar wind shock wave swept past Earth on Sept. 7th at
approximately 1630 UT (12:30 EST). The interplanetary magnetic field
turned sharply south when the wave arrived, which means a geomagnetic
storm is likely. Sky watchers in New Zealand and southern Australia, where
it was nighttime when the shock wave struck, have a good chance of seeing
Southern Lights. Observers in northern Europe, and perhaps Canada and
northern US states, might see Northern lights after local nightfall on
Saturday. Stay tuned to spaceweather.com for updates.
~MarciaH
Sat, Sep 7, 2002 (15:21)
#618
A s t r o A l e r t
Sun-Earth Alert
Solar Terrestrial Dispatch
http://www.spacew.com/astroalert.html
07 September 2002
MIDDLE LATITUDE AURORAL ACTIVITY WARNING - 07 SEPTEMBER
A powerful and high velocity coronal mass ejection was observed on 05
September that involved the violent ejection of a solar filament (a string of
cooler gas suspended above the surface of the Sun). The ejection resulted in
a high velocity CME travelling near 1700 km/sec toward the southeast of the
Earth. However, a portion of the CME was also Earthward directed.
The leading edge of this coronal mass ejection was observed impacting
the Earth near 16:37 UTC on 07 September (12:37 pm EDT). This disturbance has
the potential to drive moderate to strong levels of auroral storming over the
high latitude regions. Middle latitude observers are also expected to observe
some of the activity, particularly observers in Europe and north to central
Russia where the timing of the arrival of this disturbance will probably be
best for them. There is debate as to whether the disturbance will last long
enough to produce visible activity by the time night falls for North America.
Nevertheless, observers are encouraged to keep a close eye on the sky and
current conditions.
Current sighting reports are available at:
http://www.spacew.com/www/auroras.html
Current discussion of activity and the latest forecast notes are at:
http://www.spacew.com/aurora/forum.html
*NEW*
A new real-time image publishing server is now operational that will
permit people to publish images of astronomical or aurora events within 1 to
2 minutes of submitting them. This is an ideal avenue to publish images of
observed activity in near real-time so others can see what you are seeing, or
to showcase your own images in real-time. Details and instructions on how to
use the new service are available at: http://www.spacew.com/gallery/help.html.
The Gallery itself can be found at:
http://www.spacew.com/gallery
The official mid-latitude auroral activity warning report is included
below:
/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/
MIDDLE LATITUDE AURORAL ACTIVITY WARNING
UPDATED: 16:30 UTC, 07 SEPTEMBER 2002
/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/
*** DISTURBANCE ARRIVAL ALERT ***
*** POTENTIAL FOR MODERATE TO HIGH ACTIVITY EXISTS ***
For North Americans, begin watching TONIGHT, the evening of 07 September.
VALID BEGINNING AT: EFFECTIVE IMMEDIATELY
VALID UNTIL: 19:00 UTC ON 08 SEPTEMBER
HIGH RISK PERIOD: 07 SEPTEMBER (UTC DAYS)
MODERATE RISK PERIOD: 07 - 08 SEPTEMBER
PREDICTED ACTIVITY INDICES: 35, 20, 12, 12 (07 SEP - 10 SEP)
POTENTIAL MAGNITUDE OF MIDDLE LATITUDE AURORAL ACTIVITY: MODERATE TO HIGH
POTENTIAL DURATION OF THIS ACTIVITY: MAIN BELT = 12 TO 18 HOURS
MINOR BELT = 18 TO 24 HOURS
ESTIMATED OPTIMUM OBSERVING CONDITIONS: NEAR LOCAL MIDNIGHT
EXPECTED LUNAR INTERFERENCE: NONE
OVERALL OPPORTUNITY FOR OBSERVATIONS FROM MIDDLE LATITUDES: FAIR TO GOOD
AURORAL ACTIVITY *MAY* BE OBSERVED APPROXIMATELY NORTH OF A LINE FROM...
OREGON TO SOUTHERN IDAHO TO EXTREME NORTHERN UTAH TO SOUTHERN WYOMING TO
NEBRASKA TO IOWA TO NORTHERN ILLINOIS TO INDIANA TO OHIO TO NORTHERN
VIRGINIA AND MARYLAND.
ACTIVITY *MAY* ALSO BE OBSERVED APPROXIMATELY NORTH OF A LINE FROM...
EXTREME NORTHERN FRANCE TO BELGIUM TO CENTRAL GERMANY TO CENTRAL POLAND TO
BELARUS TO CENTRAL RUSSIA.
SYNOPSIS...
A moderately strong interplanetary shock was observed passing the ACE
spacecraft near 16:18 UTC (12:18 pm EDT) on 07 September. The disturbance has
good characteristics that are expected to help drive periods of intensified
auroral storm activity. Middle latitude observers are encouraged to keep a
close eye on conditions. European and Russian observers will be
optimally placed for observing activity. There is some doubt as to whether
the activity will remain strong enough to permit widespread middle latitude
sightings by the time North America sees darkness. Keep a close eye on
current conditions by visiting: http://www.spacew.com/aurora/forum.html and
http://www.spacew.com/www/auroras.html where reports of activity will be
displayed. The new phase of the moon will allow unrestricted and optimal
observations of activity under dark skies - ideal conditions for observing
the intricate details of auroral activity.
This warning will remain in effect until 19:00 UTC on 08 September. It
will then be updated or allowed to expire.
Please note that a new real-time aurora image gallery is available for
public use at: http://www.spacew.com/gallery. This service is capable of
publishing imagery within 1 to 2 minutes of the receipt of the images. As a
result, it is an ideal way for people to show others what they are seeing. If
you have a digital camera and are able to take a snapshot of auroral
activity, send your image to the gallery so other's who may be less fortunate
can observe what you are seeing. If you are taking pictures with film, please
feel free to submit your images after you have developed your film.
For help and instructions on how to use the service, go to:
http://www.spacew.com/help.html
PLEASE REPORT OBSERVATIONS OF AURORAL ACTIVITY TO:
http://www.spacew.com/submitsighting.html
CURRENT REPORTED SIGHTINGS OF ACTIVITY MAY BE FOUND AT:
http://www.spacew.com/www/auroras.html
CURRENT GALLERY OF ASTRONOMICAL AND AURORA IMAGES:
http://www.spacew.com/gallery
** End of the AstroAlert Bulletin **
===============================================================
~MarciaH
Sat, Sep 7, 2002 (19:48)
#619
It was a typical night for Alaska. The sky was filled with auroras;
intense waves of red and green and violet light shimmered hypnotically
overhead.
But it wasn't Alaska.
It was Ohio, Wisconsin, Michigan, Washington and other continental US
states, where surprised sky watchers saw Alaska-style auroras just
yesterday. An unexpected geomagnetic storm ignited auroras over Europe,
much of Canada and the United States on Sept. 3rd and 4th. Visit
spaceweather.com to learn more about the storm and to see pictures of the
auroras.
http://www.spaceweather.com
~tsatsvol
Tue, Sep 17, 2002 (04:59)
#620
Research Uncovers New Kuiper Belt Mystery
Although the Kuiper Belt, a region of icy objects located past the orbit of Neptune, was only discovered in 1992, it's already presented a host of mysteries. One mystery is why an unusually large number of these objects have small satellites orbiting them - 8 out of the 500 objects discovered so far have had satellites. The high number brings into question the traditional theory that they're caused by collisions.
Complete story in Southwest Research Institute News
~MarciaH
Wed, Sep 18, 2002 (23:06)
#621
Is this where we got our second and third moons? The Kuiper Belt? We are just beginning to learn about what is just beyond our own atmosphere. How wonderful to know there are always more universes to conquer with our imaginations! Thank you, John. I would share it with you if it were possible.
~MarciaH
Fri, Sep 20, 2002 (10:24)
#622
A Shocking Space Movie
NASA Science News for September 19, 2002
Astronomers have captured extraordinary footage of a Manhattan-sized star
rotating and spewing antimatter jets into space.
FULL STORY at
http://science.nasa.gov/headlines/y2002/19sep_crabmovie.htm?list89800
~MarciaH
Fri, Sep 20, 2002 (23:27)
#623
Today in Science/Astronomy:
* Harvest Moon for Skywatchers, Birdwatchers and Farmers
http://www.space.com/spacewatch/harvest_moon_020920.html
The Full Moon of Saturday, Sept. 21 also carries the title of the Harvest Moon for those living in the Northern Hemisphere. It has a long history of importance for farmers and birdwatchers, which we'll explain below. First, let's look at what's different about a Harvest Moon.
* Stunning New View of Energetic Crab Pulsar
http://www.space.com/scienceastronomy/astronomy/crab_pulsar_020919.html
Combining the power of the Hubble Space Telescope with the Chandra X-ray Observatory, researchers have made a short movie of a massive rotating star that provides new clues about how the powerful object works.
* Crab Pulsar Close-up
http://www.space.com/php/multimedia/imagepump/
Zoom in on the recent Crab Pulsar image!
* Film Director Ron Howard Talks Space as His Apollo 13 Premieres in IMAX Theaters
http://www.space.com/scienceastronomy/astronomy/crab_pulsar_020919.html
With the IMAX theater giant screen premiere of his 1995 film Apollo 13, Academy Award winning director Ron Howard says that's about as close to outer space as he is likely to get.
-----------------------------------
Today in SpaceFlight:
* Air Force Marks the 100th Launch it Didn't Goof Up
http://www.space.com/missionlaunches/range_milestone_020919.html
You can't blame the U.S. Air Force for delaying launches from the Cape -- at least not for the past 100 shots.
* New Space Junk Satellite Will Leave Earth's Grasp
http://www.space.com/scienceastronomy/space_junk_020919.html
That mysterious object discovered in orbit around Earth on September 3 is likely not to hit the Moon. Rather, the suspected Saturn IVB upper stage will swing back into orbit around the Sun, scientists said today.
* Delta 4 Still Aiming for November Launch but Problems Persist
http://www.space.com/missionlaunches/delta4_update_020919.html
Preparations to launch the first Delta 4 rocket from Cape Canaveral Air Force Station in early November are continuing but engineers still haven't resolved a problem with the software to be used during the countdown, Boeing officials said Thursday.
------------------------------------
Today in Business/Industry:
* CNES Director-General Resigns
http://www.space.com/spacenews/
Gerard Brachet has resigned as director-general of the French space agency, CNES, and will seek appointment as director of a new organization managing Europe's Galileo satellite navigation project.
------------------------------------
* SpaceTV:
http://www.space.com/php/multimedia/spacetv/
* SpaceWatch:
http://www.space.com/spacewatch/
* Space Age Jobs
http://www.spacejobs.com/
* Uplink: Share your opinion!
http://uplink.space.com/
-------------------------------------
SOLAR and SPACE WEATHER (Septemebr 20, 2002)
3-Day Solar Forecast
Solar activity is expected to be low to moderate through Friday.
3-Day Aurora Forecast
Earth's field is expected to be mostly unsettled through Friday.
Solar Data
The current sunspot number is 228, and the solar wind speed recently clocked in at 525 kilometers per second.
The solar wind density was 1.4 protons per cubic centimeter.
(Speed and density values are snapshots in time and change during the day.)
http://www.space.com/spacewatch/space_weather.html
~MarciaH
Sat, Oct 5, 2002 (20:26)
#624
Space Medicine
So you think a 6-hour car trip is tough on your body? How about a
six-month trip to Mars? In this story, researchers discuss how to keep
astronauts safe and healthy during long trips through the solar system.
FULL STORY at
http://science.nasa.gov/headlines/y2002/30sept_spacemedicine.htm?list89800
~MarciaH
Sat, Oct 5, 2002 (22:40)
#625
AMATEURS TO HELP DISCOVER EXTRA-SOLAR PLANETS
---------------------------------------------
Astronomers at NASA and the University of California at Santa Cruz have launched a Web-based project that has amateur astronomers lining up to have a chance to discover extra-solar planets that 'transit' or pass in front of their parent stars.
http://spaceflightnow.com/news/n0210/06planets/
TEAM TO DEVELOP NUCLEAR ELECTRIC POWER FOR SPACE
------------------------------------------------
A team of government, industry and academia, under the leadership of The Boeing Company, has been awarded a NASA contract to meet the challenge of developing nuclear electric power for deep space exploration.
http://spaceflightnow.com/news/n0210/06boeingpower/
ASTRONOMERS PUT QUASARS IN THEIR PLACE
--------------------------------------
A team of UK astronomers has made a decisive step toward resolving an argument that has rumbled on in the astronomical community for decades. The scientists from the University of Nottingham have been investigating the properties of quasars and nearby galaxies.
http://spaceflightnow.com/news/n0210/05quasars/
NASA HOPEFUL FOR MONDAY SPACE SHUTTLE LAUNCH
--------------------------------------------
NASA's Mission Control Center in Houston has taken back command of the international space station from Moscow following last week's hurricane alert. At Kennedy Space Center, Atlantis remains in good shape for launch Monday. The weather forecast, however, is somewhat iffy.
http://spaceflightnow.com/station/status.html
ARE LANDCOVER CHANGES ALTERING EARTH'S CLIMATE?
-----------------------------------------------
While many scientists and policy makers have focused only on how heat-trapping gases like carbon dioxide are altering our global climate, a new NASA-funded study points to the importance of also including human-caused land-use changes as a major factor contributing to climate change.
http://spaceflightnow.com/news/n0210/05landcover/
~MarciaH
Sat, Oct 5, 2002 (22:44)
#626
Today in Science/Astronomy:
* Upgrades to Boost SETI@home Alien Search
http://www.space.com/scienceastronomy/generalscience/seti_021001-1.html
The world's most popular ET-hunting program for home users is about to get upgrades of both its software and the telescope that feeds data into it.
* Starry Night's Fall Sky Tour: Easy Targets in the Northern Sky
http://www.space.com/spacewatch/easy_north_021001.html
While much of the sky offers daunting challenges to backyard astronomers, the northern fall sky includes familiar stars and star patterns that will make even the most causal stargazer feel comfortable.
* NEW! Wallpapers for your Desktop
http://www.space.com/php/multimedia/downloads/wallpapers/
A new collection of images from Space Artist John Catraham, 'The Early
Works'
* Astronotes: Soccer Mom's Space Bid on Hold
http://www.space.com/news/astronotes-1.html
A Long Beach woman said this week that her bid to become the third space tourist is on hold, as pop star Lance Bass' quest to do the same stumbles forward.
-----------------------------------
Today in SpaceFlight:
* Mission Atlantis: Meet the Crewmembers of STS-112
http://www.space.com/missionlaunches/sts112_preview_021001.html
Call them the leader, the mother, the organizer, the mentor, the ice breaker and the brother.
* Hurricane Lili still a concern for launch
http://www.space.com/shuttlemissions/
Hurricane Lili is heading toward the U.S. Gulf coast and there is enough uncertainty in its track that shuttle Atlantis' launch could be delayed -- not because of bad weather at the Cape but because of a potential threat to Mission Control in Houston.
* Mission Atlantis: Helping the Station Keep its Cool
http://www.space.com/missionlaunches/sts112_preview_020930.html
With its cracked plumbing repaired and a much-anticipated television camera mounted to its exterior, shuttle Atlantis is ready to blast off this week on a complex 11-day assembly mission to the International Space Station (ISS).
------------------------------------
Today in Business/Industry:
* Alcatel Finalizes Satellite Contract with China
http://www.space.com/spacenews/
Alcatel Space has finalized a contract to provide the Chinese government with an electronics package for a large telecommunications satellite for launch in 2005 aboard a Chinese rocket, Alcatel Space announced Sept. 27.
------------------------------------
* SpaceTV:
http://www.space.com/php/multimedia/spacetv/
* SpaceWatch:
http://www.space.com/spacewatch/
* Space Age Jobs
http://www.spacejobs.com/
* Uplink: Share your opinion!
http://uplink.space.com/
-------------------------------------
SOLAR and SPACE WEATHER (October 1, 2002)
3-Day Solar Forecast
Activity is expected to be low to moderate through Wednesday.
3-Day Aurora Forecast
Earth's geomagnetic field is expected to be quiet to unsettled, with some active periods possible Monday and Tuesday.
Solar Data
The current sunspot number is 157, and the solar wind speed recently clocked in at 315 kilometers per second.
The solar wind density was 4.3 protons per cubic centimeter.
(Speed and density values are snapshots in time and change during the day.)
http://www.space.com/spacewatch/space_weather.html
~wolf
Mon, Oct 7, 2002 (19:17)
#627
http://64.4.14.250/cgi-bin/linkrd?_lang=EN&lah=df9b86cc32916c06832cb16969fe06c5&lat=1034032623&hm___action=http%3a%2f%2fwww%2ecnn%2ecom%2f2002%2fUS%2fWest%2f10%2f07%2fmeteor%2esighting%2eap%2findex%2ehtml
~MarciaH
Wed, Oct 9, 2002 (19:47)
#628
Sweetie, that link does not work anymore. What was it???
The shuttle is up. I have not seen NASA TV on mylaptop.....
~MarciaH
Wed, Oct 9, 2002 (19:58)
#629
NASA TV links http://www.nasa.gov/ntv/ntvweb.html
~MarciaH
Mon, Oct 14, 2002 (00:21)
#630
Urban Sprawl: the Big Picture
Earth-orbiting satellites have a wonderful view of our planet's
fast-growing cities, but most city planners don't have access to this "big
picture" from space. NASA-supported scientists are working to change that.
FULL STORY at
http://science.nasa.gov/headlines/y2002/11oct_sprawl.htm?list89800
~MarciaH
Tue, Oct 29, 2002 (22:00)
#631
The latest from NASA's Earth Observatory (10/29/2002)
-----------------------------------------------------------------
New Features:
http://earthobservatory.nasa.gov/Study/
* Burned Area Emergency Rehabilitation
http://earthobservatory.nasa.gov/Study/BAER
The aftermath of a wildfire can be as dangerous as the blaze itself. The charred landscape is prone to flooding and erosion, and natural resource experts usually have only one week to assess the damage and propose steps to mitigate disaster. Satellite mapping of burned areas can save crews time and money by helping guide field crews to the most crucial areas. USDA Forest Service and University of Maryland scientists are partnering up in a project to collect ground-based data to check the accuracy of their satellite-based Burn Severity maps.
--------------------
In the News:
http://earthobservatory.nasa.gov/Newsroom/
* Latest Images:
Eruption of Sicily's Mt. Etna
http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=10804
Monster Hurricane Kenna Poses Severe Threat to Mexican Coast
http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=10803
Space Shuttle view after Kolka Glacier Collapse
http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=10802
"The Optimist," Kalahari Desert, Namibia
http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=10801
Burn Severity for Oregon's Biscuit Fire
http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=10800
Where on Earth...? MISR Mystery Image Quiz #11
http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=10799
Tarpum Bay, Bahamas
http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=10798
* NASA News
http://earthobservatory.nasa.gov/Newsroom/NasaNews/
- Computer Model Suggests Future Crop Loss Due to Potential Increases in Extreme Rain Events Over Next Century
- NASA to Develop Biohazard 'Smoke' Detector
- Shuttle Radar Clears the Air on Central America�s Topography
* Headlines from the press, radio, and television:
http://earthobservatory.nasa.gov/Newsroom/Headlines/
- Detection, Not Warming, Behind Increase in Antarctic Icebergs
- U.S. Bird Species Declining
- People Use 83 Percent of Land Surface
- Belize Cave Records El Ni�o Events
- NASA�s EO Data Put the Surveillance on the Mosquito
- Cosmic Rays Linked to Clouds
---------------------------------------------------------------------
Earth Observatory weekly mailing -- http://earthobservatory.nasa.gov/
~terry
Thu, Nov 7, 2002 (12:48)
#632
What a great combination of earth and space science! This is geosynthesis at it's finest.
~terry
Sat, Nov 23, 2002 (22:43)
#633
http://www.globeandmail.com/servlet/ArticleNews/PEstory/TGAM/20021122/UASTEB1/Science/science/science_temp/2/2/3/
An article about medium sized objects that might hit the earth.
"Small meteors more likely to leave deadly
trail of destruction on Earth, scientists say
By STEPHEN STRAUSS
Friday, November 22, 2002 � Page A21
Anyone who has ever been frightened by the Hollywood movie concept of an
asteroid smashing into Earth can rest a little easier because of
Canadian-led research published yesterday.
Scientists have used previously secret U.S. military satellite data to
estimate that a destructive impact will occur an average of once every
1,000 years. Previous estimates had suggested that an asteroid could
strike once every 200 to 300 years.
"Most of our attention has focused on the bigger guys which can cause
global damage, but the mean time of them occurring is about 700,000 years.
However, the smaller guys can cause significant regional damage and do it
much more often," said Peter Brown, an astronomer at the University of
Western Ontario in London, who is the lead author of a new paper on the
subject published in yesterday's issue of the journal Nature.
~MarciaH
Tue, Dec 10, 2002 (20:05)
#634
I hope, if I die, I get to see it on the way down!
~CherylB
Wed, Dec 18, 2002 (11:27)
#635
Ancient, Frozen Antarctic Life Revived, Along with Hopes for Life on Mars
By Robert Roy Britt
Senior Science Writer
16 December 2002
Within ice that covers a salty, liquid Antarctic lake scientists have found and revived microbes that were at least 2,800 years old. The discovery, announced today, points to probable life within the underground lake and suggests the sort of ecosystem that might exist on Mars.
The ancient microbes were in a state of suspended metabolism, similar to dormancy, said study team member John Priscu of Montana State University.
"They're in a frozen state," Priscu said in a telephone interview. "They'll come back to life if you add water."
Priscu and his colleagues camped out on the ice above 2.5-mile-long (5-kilometer) Lake Vida for about two weeks back in 1996. They drilled down about 50 feet (15 meters) to collect the aged bacteria. They were just reaching the briny slush of the lake, said to be seven times saltier than the ocean and able to remain liquid even at temperatures lower than -10 Celsius (14 degrees Fahrenheit).
"It was hard drilling," Priscu said. "It was 40 below. It was a real tough job. The next step was to get to the brine."
However, to prevent contaminating the pristine lake, the drilling system was back-pressured with de-ionized water. Seals began to fail, and the system started to leak. The researchers were forced to stop.
Priscu thinks the lake holds live organisms. Life has been found in similar salty conditions, such as the Great Salt Lake and the Dead Sea. And his lab work shows organisms can thrive in the frigid temperatures presumed for Lake Vida. His team has frozen blocks of organisms to -15 Celsius and kept them alive.
Confidence for life on Mars
Further, he said similar pockets of ice or briny water on Mars almost surely hold life, or at least signs of it. Other researchers are typically more reserved about their speculation of possible life on Mars. But Priscu has seen the living, up close, in the harshest conditions our own planet has to offer.
Critters called cyanobacteria dominate life at these extremes. Another Antarctic Lake, called Vostok, has been under similar study and organisms have been found in the ice above it. And several research teams have examined cyanobacteria in easier-to-reach pockets of polar ice. The creatures are innovative enough to generate their own sunscreen -- a handy ability to have on Mars, where radiation is harsher than on Earth.
The Lake Vida creatures are unique for their age, determined by the age of ice in which they were embedded. Other similar studies have involved ice that is frequently replenished and not as old.
Frozen polar regions on Mars might contain organisms similar to those Priscu and his colleagues have been studying over the years, he said. Or deep underground pockets of ice -- or even water -- could support them. In Priscu's mind, the question of finding life on Mars is only whether it will be crawling around or hung in a sort of natural ice museum.
"It's either extinct or extant," he said, alliteratively ruling out the possibility of coming up entirely empty in the search for past or present life on the Red Planet.
Just thaw them out
He said data his team has collected suggest bacteria and their DNA can remain viable for up to a million years. Ice is a good preservative, he said. Add a little water -- which even in a deep freeze can occur in layers where frictional energy melts ice for brief periods -- and organisms might maintain and repair their blueprints for life for many millions of years.
"If they're frozen [on Mars] and younger than 1 million years," Priscu said, "give them some water and they probably would come back."
The research, funded by the National Science Foundation and NASA, is reported in the Dec. 16 issue of the Proceedings of the National Academy of Sciences.
Peter Doran of the University of Illinois at Chicago is the lead author of the paper.
When the study began, the scientists had thought Lake Vida might be a frozen chunk of ice, like other known "lakes" in the region. But the ice cores, along with ground-penetrating radar and long-term temperature data, revealed that Vida has a thick, light-blocking ice cover, vast amounts of ancient organic material and sediment, and the liquid zone underneath.
"Mars is believed to have a water rich past, and if life developed, a Lake Vida-type ecosystem may have been the final niche for life on Mars before the water bodies froze solid," Doran said in a statement.
http://www.space.com/scienceastronomy/antarctic_life_021216.html
~MarciaH
Tue, Jan 7, 2003 (02:37)
#636
A new NASA mission named "CHIPS" will soon leave Earth to study the
remains of some uncomfortably close supernova explosions.
FULL STORY at
http://science.nasa.gov/headlines/y2003/06jan_bubble.htm?list89800
~ramesh2005
Tue, Jan 7, 2003 (02:54)
#637
it good
~MarciaH
Tue, Jan 7, 2003 (15:33)
#638
Welcome and Aloha Ramesh. I am assuming you are somwhere in the Pakistan or India area. Please tell us more about you!
~MarciaH
Fri, Jan 17, 2003 (17:17)
#639
SHUTTLE COLUMBIA ROCKETS INTO ORBIT FOR SCIENCE FLIGHT
------------------------------------------------------
With fighter planes and radars scanning the sky for intruders, the shuttle Columbia thundered away on a marathon 16-day science mission Thursday, carrying a crew of seven - including the first Israeli astronaut - scores of experiments and a menagerie of animal and insect research subjects.
http://spaceflightnow.com/shuttle/sts107/030116launch/
Watch it on Nasa TV on your computer:
http://www.nasa.gov/ntv/ntvweb.html
~terry
Fri, Feb 28, 2003 (11:47)
#640
Ask yourself, what would really get Marci's juices going?
Answer: a news story that combines space and volcanoes.
At the edge of space � the same cold region where space shuttle Columbia broke up into a trail of debris � shiny, silvery blue clouds have been hovering.
The high-altitude ice clouds are called noctilucent or "night-shining" clouds, and astronauts as well as Earth-bound scientists have been puzzled by their growing abundance.
The clouds are visible from space and from the ground over areas that are experiencing summer weather. Astronauts on the space station are seeing them over the southern hemisphere where it's now warm.
"We've seen definite changes," said John Olivero, a professor of physical science at Embry-Riddle Aeronautical University in Daytona Beach, Fla. "It appears the particles that make up the clouds have gotten slightly bigger with time and it appears the clouds are now visible further away from the poles than they have been before."
Volcanic Beginning
The last time these high, shiny clouds appeared in great numbers was after the 1883 eruption of the island volcano, Krakatoa, in Indonesia. The explosion hurled plumes of ash up to 50 miles into the air and caused spectacular sunsets.
The ash particles also served as rare anchors to water vapor at high altitudes and the vapor condensed to ice, forming the brilliant blue clouds. Sky gazers who stayed up late following the eruption reported seeing wispy, glowing streaks in the night sky. Before this incident there were no reported sightings of noctilucent clouds.
But why so many night shining clouds now?
"It's still being debated," says Chester Gardner, an atmospheric scientist at the University of Illinois at Urbana.
One reason scientists are having such a hard time understanding the shimmering clouds is their location. At 30-60 miles above Earth, the mesosphere is also known as the "ignorosphere" due to its inaccessibility. The region is too far to reach by weather balloon and yet it sits below where orbiting satellites or other craft might orbit because its heavier atmosphere would cause too much drag.
The rest of the story at
http://abcnews.go.com/sections/scitech/DailyNews/nighshiningclouds030228.html
~MarciaH
Sat, Mar 1, 2003 (19:13)
#641
Thank you, Terry! You knnow me very well. Most interesting!
A Most Surprising Observation
"Quite by accident, we have made a most surprising observation," reports
Don Pettit, the science officer of the International Space Station. It
happened during his spare time on a Saturday morning last month. Pettit
was preparing to make some weightless soap bubbles--just for fun--when he
discovered a very curious property of water in space.
FULL STORY at
http://science.nasa.gov/headlines/y2003/25feb_nosoap.htm?list89800
~MarciaH
Sat, Mar 1, 2003 (19:15)
#642
Interesting Clouds
Astronauts onboard the International Space Station have been observing
strange electric-blue clouds hovering near the edge of space.
FULL STORY at
http://science.nasa.gov/headlines/y2003/18feb_nlc.htm?list89800
~MarciaH
Fri, Mar 7, 2003 (10:49)
#643
Today on SPACE.com -- Friday, March 7, 2003 -- http://www.space.com/
In today's issue:
/-------------------------------------
Interstellar Flight
Be part of a real mission to the stars! Include your photo, message and DNA on board Humanity's First Starship.
Makes a great gift!
http://www.space.com/teamencounter/
-------------------------------------/
Featured Products
* The Space Store
Investigation Columbia: Newest Developments in Shuttle Inquiry
http://www.space.com/columbiatragedy/
Spaceflight:
* Model Rocket Engine Size Matters to Government Regulators
* Russia Insists It Needs Cash from Space Station Partners Soon
* Columbia Accident Hearing Probes NASA Workforce Erosion, Shuttle Safety Issues
Technology:
* Space Shuttle Tile System Unique, Future Could Bring Alternatives
* Tech Today: Home Theater Made Easy
Science/Astronony:
* Fact vs. Fiction: Reading Weather in the Sun, Moon and Stars
* The Big Rip: New Theory Ends Universe by Shredding Everything
* Mars Core Squishy, Goes with the Tidal Flow
* New Views of Jupiter Force Rethink of Cloudy Theories
Recent Headlines:
* Three Members Added to Columbia Investigation Panel
* Columbia Public Hearing to Include Experts on Foam, Shuttle Systems
* Molten Aluminum Found on Columbia Tiles
* NASA: No Internal Shuttle Policy Changes Ahead of Probe Findings
* China Outlines its Lunar Ambitions
* Pioneer 10: Farewell to an Old Friend
* Seven Newfound Moons of Jupiter Bring Tally to 47
* Radio Star: ALMA Telescope to See Stellar Birth, Galactic
* Powerful Space Bursts Reflect Two Ways to Make Black Holes
Plus...
* SpaceTV, SpaceWatch
* Solar and Space Weather
* Starry Night, TeamSETI
-----------------------------------
~MarciaH
Sat, Mar 8, 2003 (17:04)
#644
Busy Sky: Jupiter, Mars and Comet NEAT
Space Weather news for March 8, 2003
http://www.spaceweather.com
MARS: Mars and Earth are converging for an extraordinary close encounter
later this year. The approaching red planet is now brighter than a
1st-magnitude star--it's gliding through the star fields of Sagittarius in
the morning sky.
JUPITER: The brightest "star" in the evening sky is Jupiter. This month
the giant planet is gliding by the Beehive Cluster of stars in the
constellation Cancer. The view through binoculars is splendid!
COMET NEAT: After a close encounter with the Sun last month, Comet NEAT
is emerging from the Sun's glare into the evening skies of the southern
hemisphere. Sky watchers in Argentina, Australia and New Zealand (among
other places) say the comet is dim yet visible to the unaided eye with a
tail that looks nice through small telescopes and binoculars.
AURORAS: Solar wind gusts buffeted Earth's magnetic field last week and
sparked auroras at high latitudes. The next series of geomagnetic storms
could begin around March 15th.
Visit spaceweather.com for images, sky maps and more information.
~MarciaH
Sun, Mar 9, 2003 (16:47)
#645
The Oldest Light in the Universe
A NASA satellite has taken a picture of the Big Bang's ancient afterglow.
Scientists have analyzed the data and learned that the universe is 13.7
billon years old (plus or minus 1 percent)and that the first stars
appeared only 200 million years after the Big Bang. These results are a
milestone in cosmology, says the NASA director of astronomy and physics.
FULL STORY at
http://science.nasa.gov/headlines/y2003/11feb_map.htm?list89800
~MarciaH
Sun, Mar 9, 2003 (16:48)
#646
Living up to the Hype: Superconductors
Thanks to years of research involving experiments flown on the space
shuttle, NASA-supported scientists are closer than ever to unlocking the
amazing potential of high-temperature superconductors.
FULL STORY at
http://science.nasa.gov/headlines/y2003/05feb_superconductor.htm?list89800
~MarciaH
Mon, Mar 10, 2003 (16:25)
#647
Today on SPACE.com -- Monday, March 10, 2003
* Columbia's Final Data Transmission Sends Mixed Signals
http://www.space.com/missionlaunches/sts107_data_030310.html
In the moments before Columbia broke apart over Texas, an attempt may have been made to override the shuttle's autopilot, based on an exhaustive analysis of the final bits of data, officials say.
* Apollo Moonwalkers: Vision Needed in Columbia Aftermath
http://www.space.com/missionlaunches/sts107_vision_030310.html
Apollo astronauts from the first and last expedition to the Moon see far-reaching consequences rippling through America's space program due to the loss of Columbia and its seven-person crew.
* NASA Investigates Dozens of Scenarios, Though Odds of Foam Damaging Orbiter Remote
http://www.space.com/missionlaunches/sts107_search_030308.html
A NASA-wide campaign is underway with technical teams sifting through data and debris in an attempt to find the cause behind the loss of Columbia and its crew.
* Shuttle Probe to Study NASA Communication
http://www.space.com/missionlaunches/sts107_communication_030308.html
A new team will look into NASA's internal communications, including e-mails and management directives, as part of the investigation into what caused the breakup of the space shuttle Columbia last month.
* Shuttle Flight Plans in Work; NASA Aims for Launch by Summer 2004
http://www.space.com/missionlaunches/sts107_fleet_030308.html
NASA and its contractors already are doing the planning and engineering work necessary to launch another shuttle no later than summer 2004, shuttle program sources told Florida Today.
* Russian Imaging Satellite To Serve Civil, Commercial Users
http://www.space.com/spacenews/spacenews_businessmonday_030310.html
Russia's TsSKB Progress organization of Samara is building what program officials say is the country's first civilian imaging spacecraft capable of transmitting high-resolution digital pictures to ground stations as it passes overhead.
~MarciaH
Tue, Mar 11, 2003 (16:28)
#648
From NASA science news:
From Feb. 4th, 2003: At the dawn of the space age some 40 years ago, we always
knew who was orbiting Earth or flying to the Moon. Neil Armstrong, Yuri
Gagarin, John Glenn. They were household names--everywhere.
Lately it�s different. Space flight has become more �routine.� Another
flight of the shuttle. Another visit to the space station. Who�s onboard
this time? Unless you�re a NASA employee or a serious space enthusiast,
you might not know.
Dave Brown, Rick Husband, Laurel Clark, Kalpana Chawla, Michael Anderson,
William McCool, and Ilan Ramon
Now we know. Those are the names of the seven astronauts who were
tragically lost on Saturday, Feb. 1st, when the space shuttle Columbia
(STS-107) broke apart over Texas.
Before the accident, perhaps, they were strangers to you. But if that's
so, why did you have a knot in your gut when you heard the news? What were
those tears all about? Why do you feel so deep-down sad for seven
strangers?
Astronauts have an unaccountable hold on us. They are explorers. Curious,
humorous, serious, daring, careful. Where they go, they go in peace. Every
kid wants to be one. Astronauts are the essence of humanity.
They are not strangers. They are us.
While still in orbit Dave Brown asked, jokingly, �do we really have to
come back?�
No. But we wish you had.
The Science@NASA team, as does all of NASA and the world, extends
heartfelt sympathies to the family, friends and colleagues of the STS-107
crew. Please see the NASA Home Page (http://www.nasa.gov) for more
information on the Columbia Investigation.
--Tony Phillips, Ron Koczor, Bryan Walls, Becky Bray, Patrick Meyer.
~MarciaH
Mon, Apr 14, 2003 (18:36)
#649
Aurora Blues
Astronauts onboard the International Space Station (ISS) have seen a lot
of auroras in recent months. They've even flown through some. Usually the
lights are green; sometimes they're red. Other colors are rare. So when
ISS science officer Don Pettit looked out the window on March 29th and saw
vivid blue-rimmed auroras, he had to grab his camera and take a picture.
Read the FULL STORY to find out what makes these Northern Lights so blue:
http://science.nasa.gov/ppod/y2003/09apr_aurorablues.htm
~MarciaH
Mon, Apr 14, 2003 (18:37)
#650
Supernova
On March 29, 2003, in the constellation Leo, something exploded--bright
enough to see through small telescopes in brightly-lit cities.
Astronomers who have collected data from the event say it provides the
long-sought link between supernovas and mysterious gamma ray bursts.
FULL STORY at
http://science.nasa.gov/headlines/y2003/10apr_grb.htm?list89800
~terry
Mon, Apr 14, 2003 (18:42)
#651
It's
a Supernova!
Source: NASA
Posted: 4/10/2003
On March 29, 2003, in the
constellation Leo, something exploded--bright enough to see through small
telescopes in brightly-lit cities. Astronomers say it provides the
long-sought link between supernovas and mysterious gamma ray bursts.
Full
story...
~terry
Mon, Apr 14, 2003 (18:44)
#652
~terry
Tue, Apr 15, 2003 (22:35)
#653
Delay to US Mars mission
By Helen Briggs
BBC News Online science reporter
The US space agency Nasa has been forced to delay the launch of the first of the two rovers it is sending to Mars this summer.
The take-off has been put back by a week or so to allow electrical repairs to be made to the identical rovers.
The rover will act as a 'robot geologist'
Pre-launch tests at the weekend raised concerns that they might be vulnerable to a computer glitch.
The spacecraft will now have to be taken apart at Nasa's Kennedy Space Center in Cape Canaveral, Florida.
George Diller of the Kennedy Space Center said an electrical circuit board needed to be modified.
"It'll be a fairly easy thing to fix but it does mean going into both of the rovers, removing the circuit card and making some modifications to it," he told BBC News Online.
The first Mars Exploration Rover was set to be launched by a Delta 11 rocket on 30 May.
It will now take off between 6 June and 19 June. The second spacecraft will be launched 10 days after the first.
http://news.bbc.co.uk/1/hi/sci/tech/2950395.stm
~MarciaH
Sat, Apr 19, 2003 (17:45)
#654
Oooh I remember that little rover. They ran it around the lava beds here for a while to see how it would perform.
~terry
Sun, Apr 20, 2003 (21:59)
#655
Wow, did you see that?
~MarciaH
Sun, Apr 20, 2003 (22:36)
#656
alas no. I did get to have dinner with the astronauts who were also practicing for an ashy landing. I think having dialogue with three of my very own immediate astronauts was one of those nights one does not forget!
~MarciaH
Sun, Apr 20, 2003 (22:38)
#657
Some of the NASA stuff done here during the early stages of the space race were so classified as to be off limits to the public - even those with connections.
Scandia Lab was running a lot of the experiments. And, you know how secret they can be!
~terry
Mon, Apr 21, 2003 (11:41)
#658
Dinner with the astronauts! Wow. That's great. What did you talk about?
~MarciaH
Fri, May 2, 2003 (19:07)
#659
Talking shop was what I wanted out of them, but instead they ended up picking my brains about what was edible on the "exotic" Japanese dinner buffet. This was pre-sushi days, so the thought of eating seaweed and raw fish scared them to death. They would go the moon strapped to a firecracked, but NOT eat weird food. One noticed a big bowl of eggs. He commented that at least they knew how to eat hard boiled eggs! I hated to tell them, but those eggs were also raw! Used to cool off blistering hot soups, they end up like thin scrambled eggs. It was great fun. We talked about all sorts of things. I wondered to them if the constellations were as hard to define from 35,000 feet as it was beyond. I never heard the answer.
~terry
Sat, May 3, 2003 (17:02)
#660
What a great question for them.
~MarciaH
Sun, May 4, 2003 (01:20)
#661
I had trouble seeing anything recognizable even at 20,000 feet. I wonder what the altitude is for losing the perspective we have here on earth. Of course, everything we see from here is at different distances and moving independently. What we see today will not look like it will look in the future, not like it looked in ancient times!
ISS science officer Don Pettit's latest "Saturday Morning Science"
experiment reveals something oddly familiar about boiling water in space.
FULL STORY (WITH MOVIES)
http://science.nasa.gov/ppod/y2003/01may_boiling.htm
~MarciaH
Sun, May 4, 2003 (01:21)
#662
Geomagnetic activity surged for a while on Monday, April 28th, when Earth
glided through a solar wind stream. Northern Lights in the United States
descended as far south as Wisconsin. More auroras are possible on May 1st
when our planet is expected to encounter another solar wind stream flowing
from a coronal hole on the sun.
Meanwhile, the sunspot number is rising. The face of the sun is peppered
with active regions--one stretching nearly 10 Earth-diameters from end to
end. The impressive sunspot group is easy to observe using safe solar
projection methods.
Visit spaceweather.com for images and more information
~MarciaH
Fri, May 9, 2003 (18:06)
#663
Space Weather News for May 9, 2003
http://spaceweather.com
SUN MOVIE: On May 7th German astronomers witnessed something remarkable: a
spacecraft and a planet crossing the face of the Sun at the same time. The
planet was Mercury. The spacecraft was the International Space Station.
Visit spaceweather.com to view a movie of this unprecedented double solar
transit.
AURORA WATCH: Earth is still inside a high-speed solar wind stream that
has triggered mild geomagnetic storming since May 7th. High-latitude
auroras are possible this weekend. Visit spaceweather.com for images and
updates.
~MarciaH
Fri, May 23, 2003 (16:24)
#664
MARTIAN VIEW OF EARTH
---------------------
Have you ever wondered what you would see if you were on Mars looking at
the Earth through a small telescope? Now you can find out, thanks to a
unique view of our world recently captured by NASA's Mars Global Surveyor
spacecraft currently orbiting the Red Planet.
http://spaceflightnow.com/news/n0305/22earthmgs/
HUBBLE SEES THE MYSTERIOUS 'GARDEN-SPRINKLER' NEBULA
----------------------------------------------------
There are many mysterious objects seen in the night sky which are not
really well understood. For example, astronomers are puzzled by the "jets"
emerging from planetary nebulae. However, the S-shaped jet from Henize
3-1475 is the most perplexing of all.
http://spaceflightnow.com/news/n0305/22sprinkler/
THE UNIVERSE'S BIGGEST CONSTRUCTION SITES
-----------------------------------------
Images made by NASA's Chandra X-ray Observatory have revealed two distant
cosmic construction sites buzzing with activity. This discovery shows how
super massive black holes control the growth of massive galaxies in the
distant Universe.
http://spaceflightnow.com/news/n0305/21construction/
FROZEN LIGHT RESEARCH HOLDS PROMISE, NASA SAYS
----------------------------------------------
NASA-funded research at Harvard University, Cambridge, Mass., that
literally stops light in its tracks, may someday lead to breakneck-speed
computers that shelter enormous amounts of data from hackers.
http://spaceflightnow.com/news/n0305/21frozen/
SLAG ON SHUTTLE DEBRIS SUGGESTS LOCATION OF BREACH
--------------------------------------------------
Based on chemical analysis of slag found on the back side of a wing
leading edge fragment, investigators now believe the breach that destroyed
the shuttle Columbia occurred at or very near the lower inboard corner of
reinforced carbon carbon panel No. 8, very close to where a so-called
T-seal was mounted between RCC panels 7 and 8.
http://spaceflightnow.com/shuttle/sts107/030520slag/
NEWLY-DISCOVERED STAR MAY BE THIRD-CLOSEST TO US
------------------------------------------------
The local celestial neighborhood just got more crowded with a discovery of
a star that may be the third closest to the Sun. The star,
"SO25300.5+165258," is a faint red dwarf star estimated to be about 7.8
light-years from Earth in the direction of the constellation Aries.
http://spaceflightnow.com/news/n0305/20closestar/
FIVE SPACECRAFT JOIN TO SOLVE AN AURORAL PUZZLE
-----------------------------------------------
Five spacecraft have made a remarkable set of observations, leading to a
breakthrough in understanding the origin of a peculiar and puzzling type
of aurora. Seen as bright spots in Earth's atmosphere and called "dayside
proton auroral spots," they are now known to occur when fractures appear
in the Earth's magnetic field, allowing particles emitted from the Sun to
pass through and collide with molecules in our atmosphere.
http://spaceflightnow.com/news/n0305/20auroral/
AIR FORCE WEATHER SATELLITE LAUNCH RESCHEDULED
----------------------------------------------
The long-delayed launch of the U.S. military's next polar-orbiting weather
satellite is being targeted for this summer, the Air Force says.
http://spaceflightnow.com/titan/g9/030519reset.html
~MarciaH
Mon, Jul 28, 2003 (11:39)
#665
GIANT GAS CLOUD MADE OF ATOMS FORMED IN FIRST STARS
---------------------------------------------------
Astronomers studying the most distant quasar yet found in the Universe
have discovered a massive reservoir of gas containing atoms made in the
cores of some of the first stars ever formed.
http://spaceflightnow.com/news/n0307/25atoms/
TROUBLES STRIKE LANDSAT 7
-------------------------
Officials with the Landsat 7 Earth-watching satellite program have now
spent almost two months struggling with a problem that significantly
degrades the scientific value of images from the observatory.
http://spaceflightnow.com/news/n0307/27landsat7/
SPACE ENTREPRENEURS SEEK REGULATORY RELIEF
------------------------------------------
Entrepreneurs creating new commercial space companies as well as those
interested in investing in those companies said this past week that
Congress needs to take several steps to improve regulations to allow those
companies to flourish.
http://spaceflightnow.com/news/n0307/26hearing/
INTRIGUING CELESTIAL IMAGES ARRIVE FROM GALEX
---------------------------------------------
NASA's Galaxy Evolution Explorer has beamed back revealing images of
hundreds of galaxies to expectant astronomers, providing the first batch
of data on star formation that they had hoped for.
http://spaceflightnow.com/news/n0307/27galex/
NEXT INTERNATIONAL SPACE STATION CREW NAMED
-------------------------------------------
Veteran NASA astronaut Michael Foale and seasoned Russian cosmonaut
Alexander Kaleri are set to be the eighth crew to live aboard the
International Space Station. They're scheduled to begin their mission in
October, when they launch into space aboard a Russian Soyuz spacecraft.
http://spaceflightnow.com/news/n0307/26exp8crew/
CANADIAN TEAM MAPS HALOS AROUND GALAXIES
----------------------------------------
Two University of Toronto astronomers and a U.S. colleague have made the
first measurements of the size and shape of massive dark matter halos that
surround galaxies.
http://spaceflightnow.com/news/n0307/25halos/
~MarciaH
Mon, Jul 28, 2003 (11:42)
#666
Spaceflight:
* X-43A: High Hopes For Return to Flight
http://www.space.com/businesstechnology/technology/x43a_return_030728.html
As NASA prepares a return-to-flight of its X-43A Hyper-X vehicle, the agency is holding its collective breath about the future of "air-breathing" engine technologies. A second vehicle is now being prepped to fly no later than mid-November.
* Fixing Landsat 7 Taking Longer Than Expected
http://www.space.com/spacenews/spacenews_businessmonday_030728.html
Efforts to fix the Landsat 7 Earth observation spacecraft are taking longer than expected, and now the U.S. Geological Survey (USGS) is preparing for the possibility that the problem may be permanent, a USGS spokesman said.
* Poll: Support for Space Program Steady
http://www.space.com/missionlaunches/sts107_poll_030728.html
Two-thirds of Americans say the space shuttle should continue to fly despite two disastrous accidents, but enthusiasm for putting civilians aboard is declining, an Associated Press poll finds
* NASA Pluto Mission to Rely on Lockheed Martin Atlas 5
http://www.space.com/missionlaunches/atlas5_pluto_030725.html
Humanity's first probe to take an up-close look at Pluto and its moon Charon will be launched in January 2006 on an Atlas 5 rocket, NASA officials announced Thursday.
* U.S. Air Force Lowers Boom on Boeing Delta Program
http://www.space.com/missionlaunches/boeing_eelv_030724.html
Boeing Co. will forfeit $1 billion in Pentagon launch business and be suspended from upcoming launch competitions as punishment for cheating in a 1998 U.S. Air Force rocket procurement, a senior service official said.
* Tech Today: Lights, Camera, Action! The New Palm Zire 71
http://www.space.com/techtoday/tech_today.html
After years of so-so new PDAs, Palm is finally aiming for the top with its fun-loving Zire 71
-----------------------------------
Science/Astronomy:
* Space Mailbag: Suggestions for Renaming the Moon -- Or Not
http://www.space.com/scienceastronomy/space_mailbag_moon_030725-1.html
The Space Mailbag is stuffed with suggestions about what (or whether) to rename the Moon.
* New Map of Water Ice on Mars
http://www.space.com/marsrover/
A new global map of Mars shows likely locations of water ice based on observations of hydrogen made by NASA's Odyssey spacecraft.
* Image of the Day: Handle With Care
http://www.space.com/imageoftheday/image_of_day_030728.html
After several delays, NASA's last Great Observatory, Space Infrared Telescope Facility (SIRTF) is scheduled to launch on August 23.
* Astronotes: Catch a Shooting Star Near Mars
http://www.space.com/astronotes/astronotes.html
This is a great week to see shooting stars, and Tuesday morning offers a good opportunity to pair meteor watching with planet hunting.
----------------------------------
Recent Headlines:
* U.S. Air Force Lowers Boom on Boeing Delta Program
http://www.space.com/missionlaunches/boeing_eelv_030724.html
* Dennis Tito Ready to Invest in Suborbital Rocket, But Wary of Gov't. Regulations
http://www.space.com/missionlaunches/tito_regulations_030724.html
* Debate Intensifies for Simple Vs. Advanced OSP Design
http://www.space.com/businesstechnology/technology/osp_debate_030724.html
* X Prize Entry Starchaser Successfully Test Drops Piloted Capsule
http://www.space.com/businesstechnology/technology/starchaser_test_030424.html
* Gravity's Rainbow: GRACE Mission Pushes Forward
http://www.space.com/scienceastronomy/gravity_map_030725.html
* Undersea World Points to Possible Origin of Life, Maybe Even ET
http://www.space.com/scienceastronomy/lost_city_030724.html
* Panspermia: Spreading Life Through the Universe
http://www.space.com/searchforlife/seti_panspermia_030724.html
~terry
Sat, Aug 16, 2003 (12:52)
#667
Roll your own radio telescope from an old satellite dish.
http://radio.uindy.edu/radio/cheap.htm
~wolf
Tue, Aug 26, 2003 (21:11)
#668
mars mars and mars!!!!!!!!!! you guys look for the red "star" and with a telescope, it'll look like a full moon (tonight is the best night for viewing-southern)
~wolf
Tue, Aug 26, 2003 (21:12)
#669
southern portion of the sky, i should've said, time depends on your location--nasa has info on it and you can type in 'mars' on google and get a load of info
~stacey
Wed, Aug 27, 2003 (00:31)
#670
I can see it, I can see it!
Was going to take the kids to the CU telescope tonight but... too many meltdowns this afternoon... just wasn't worth it to me.
Although it is kind of cloudy here tonight, the clusters of clouds break up nicely and allow a great view of what looks like the brightest (and kind of pink) star I've ever seen! Too neat!
~aa9il
Wed, Aug 27, 2003 (12:26)
#671
Hi all
The sun has been active too so possibility of aurora?
Look to the northern skies!
de Mike
~MarciaH
Wed, Sep 3, 2003 (22:04)
#672
Yay! Fun in the sky for everyone! Too bad monsoons have socked us in for the last week or more. All it does is make the grass grow faster and the tide gauges rise faster. Hmmm... surf may be up on the River, too...!
Who has an old satellite dish? I hear they are pretty available at the larger rubbish tips around the nation nowadays. Happy hunting!
~terry
Wed, Sep 10, 2003 (22:46)
#673
A 53-hour Chandra observation of the central region of the Perseus galaxy
cluster (left) has revealed wavelike features (right) that appear to be
sound waves. The features were discovered by using a special
image-processing technique to bring out subtle changes in brightness.
Illustration of Ripples in Perseus
These sound waves are thought to have been produced by explosive events
occurring around a supermassive black hole (bright white spot) in Perseus
A, the huge galaxy at the center of the cluster. The pitch of the sound
waves translates into the note of B flat, 57 octaves below middle-C. This
frequency is over a million billion times deeper than the limits of human
hearing, so the sound is much too deep to be heard.
The image also shows two vast, bubble-shaped cavities, each about 50
thousand light years wide, extending away from the central supermassive
black hole. These cavities, which are bright sources of radio waves, are
not really empty, but filled with high-energy particles and magnetic
fields. They push the hot X-ray emitting gas aside, creating sound waves
that sweep across hundreds of thousands of light years.
Animation of Sound Waves Generated in Perseus Cluster
The detection of intergalactic sound waves may solve the long-standing
mystery of why the hot gas in the central regions of the Perseus cluster
has not cooled over the past ten billion years to form trillions of stars.
As sounds waves move through gas, they are eventually absorbed and their
energy is converted to heat. In this way, the sound waves from the
supermassive black hole in Perseus A could keep the cluster gas hot.
The explosive activity occurring around the supermassive black hole is
probably caused by large amounts of gas falling into it, perhaps from
smaller galaxies that are being cannibalized by Perseus A. The dark blobs
in the central region of the Chandra image may be fragments of such a
doomed galaxy.
http://chandra.harvard.edu/photo/2003/perseus/
~MarciaH
Thu, Oct 23, 2003 (19:14)
#674
Spectacular, Terry! I need to get out there and look at the sky again!
~terry
Wed, Nov 5, 2003 (09:24)
#675
http://www.space.com/scienceastronomy/solar_flare_031104.html
Biggest solar flare ever.
Let the above picture load, it takes a while.
~terry
Wed, Nov 5, 2003 (09:25)
#676
Then the corona was hurled in to space.
~terry
Wed, Nov 5, 2003 (23:54)
#677
http://www.cnn.com/2003/TECH/space/11/05/voyager.solar.boundary.ap/
Travelling one million miles a day, the Voyager 1 spacecraft is now
out at the solar system's edge.
~wolf
Thu, Nov 6, 2003 (12:09)
#678
awesome!
~terry
Thu, Nov 6, 2003 (14:04)
#679
And get this, from the article.
Get this...
The sun sends out a stream of highly charged particles, called the solar
wind, that carves out a vast bubble around the solar system.
Beyond the bubble's ever-shifting boundary, called the termination shock,
lies a region where particles cast off by dying stars begin to hold sway.
That region, called the heliopause, marks the beginning of interstellar
space and the end of our solar system. Whether Voyager 1 reached that mark
or is still on approach remains unclear, with scientists providing
evidence for both claims. Details appear Thursday in the journal Nature.
"Neither explanation is certain," writes Len Fisk, of the University of
Michigan, in an editorial accompanying the two studies.
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Scientists have long theorized that a shock wave exists where the hot
solar wind bumps up against the thin gas of the interstellar medium. A
similar shock wave precedes aircraft flying faster than the speed of
sound, causing a sonic boom.
In space, the violent encounter slows the solar wind from supersonic
velocity to subsonic speed, and causes a pileup of particles.
As they accumulate, the particles increase in temperature. Also, as they
skip back and forth across the shock boundary, they are accelerated and
energized.
Scientists have pored over data from Voyager 1 for evidence of any of
those activities, which would suggest the one-ton spacecraft has reached
the termination shock. The one instrument that could measure the solar
wind velocity and give somewhat of a definitive answer ceased working
years ago.
One team, studying lower energy particles, inferred that the solar wind
velocity did tail off beginning in August 2002, suggesting Voyager 1
temporarily reached the termination shock.
~terry
Thu, Nov 6, 2003 (17:33)
#680
termination shock
Does not sound fun.
~terry
Sat, Nov 8, 2003 (12:20)
#681
Tonight, November 8, there will be an eclipse of the moon, visibile in
whole or in part throughout the continental United States.
~wolf
Sun, Nov 9, 2003 (09:48)
#682
we missed it (it was 8PM EST but we're PST)
~wolf
Mon, Nov 24, 2003 (20:38)
#683
oh, and i missed the meteor shower *sigh*
where's marcia? i sent her an email but don't know if it made it. marcia, you take care of my twin!!
~terry
Tue, Nov 25, 2003 (13:02)
#684
Where's Marcia? Beaming good energy her way.
~terry
Thu, Nov 27, 2003 (03:46)
#685
This true color mosaic of Jupiter was constructed from images taken by the
narrow angle camera onboard NASA's Cassini spacecraft on December 29,
2000, during its closest approach to the giant planet at a distance of
approximately 10 million kilometers (6.2 million miles).
It is the most detailed global color portrait of Jupiter ever
produced; the smallest visible features are approximately 60
kilometers (37 miles) across. The mosaic is composed of 27 images: nine
images were required to cover the entire planet in a tic-tac-toe pattern,
and each of those locations was imaged in red, green, and blue to provide
true color. Although Cassini's camera can see more colors than humans
can, Jupiter's colors in this new view look very close to the way the
human eye would see them.
Everything visible on the planet is a cloud. The parallel reddish-brown
and white bands, the white ovals, and the large Great Red Spot persist
over many years despite the intense turbulence visible in the atmosphere.
The most energetic features are the small, bright clouds to the left of
the Great Red Spot and in similar locations in the northern half of the
planet. These clouds grow and disappear over a few days and generate
lightning. Streaks form as clouds are sheared apart by Jupiter's intense
jet streams that run parallel to the colored bands. The prominent dark
band in the northern half of the planet is the location of Jupiter's
fastest jet stream, with eastward winds of 480 kilometers (300 miles) per
hour. Jupiter's diameter is eleven times that of Earth, so the smallest
storms on this mosaic are comparable in size to the largest hurricanes on
Earth.
Unlike Earth, where only water condenses to form clouds, Jupiter's clouds
are made of ammonia, hydrogen sulfide, and water. The updrafts and
downdrafts bring different mixtures of these substances up from below,
leading to clouds at different heights. The brown and orange colors may be
due to trace chemicals dredged up from deeper levels of the atmosphere, or
they may be byproducts of chemical reactions driven by ultraviolet light
from the Sun. Bluish areas, such as the small features just north and
south of the equator, are areas of reduced cloud cover, where one can see
deeper.
For more information, see the Cassini Project home page,
http://saturn.jpl.nasa.gov
and the Cassini imaging team home page,
http://ciclops.org
The imaging team is based at the Space Science Institute, Boulder, Colo.
The Cassini-Huygens mission is a cooperative project of NASA, the European
Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory,
a division of the California Institute of Technology in Pasadena, manages
the Cassini mission for NASA's Office of Space Science, Washington, D.C.
http://photojournal.jpl.nasa.gov/catalog/PIA04866
~MarciaH
Sat, Nov 29, 2003 (17:48)
#686
Solar maximum is years past, yet the sun has been remarkably active
lately. Is the sunspot cycle broken?
FULL STORY at
http://science.nasa.gov/headlines/y2003/12nov_haywire.htm?list89800
*****************
A RECORD-BREAKING SOLAR FLARE & MID-LATITUDE AURORA WATCH
At approximately 19:47 UTC (2:47 pm EST) on 04 November, active sunspot
complex 10486 spawned what is probably the most intense x-ray flare in
history. X-ray sensors on-board the GOES spacecraft are only capable of
registering x-ray intensities up to a class X17.4 level. X-ray intensities
beyond this level saturate the detectors. This solar flare saturated the
x-ray detectors for 11 minutes, leaving space weather forecasters and
scientists with some work to try and extrapolate the true intensity of the
event. Based on a preliminary extrapolation, it appears that this x-ray flare
peaked somewhere between the X30 and X40 levels, which was unheard of until
yesterday and is possibly as much as twice as energetic as the X17 solar
flare observed on 02 November.
To place this event into historic perspective, it very likely ranks as
the most powerful x-ray flare ever observed. During the last two weeks,
active Region 10486 has produced three x-ray flares that have ranked within
the top 10 of the most intense events in history. It has been quite a ride!
Region 10486 has now rotated behind the western limb and out of view. It
will now spend the next two weeks traversing the far side of the Sun. Whether
it survives its passage on the far-side and returns to the eastern limb in
two weeks in a form still capable of producing energetic events remains
unknown. It is possible it could return in a form still capable of producing
energetic events, but the odds are against it.
Although only time will tell, observers on Earth will be able to monitor
its progress indirectly by watching for coronal mass ejections that occur on
the far side of the Sun, but are still visible from Earth via the SOHO LASCO
cameras.
Spectacular imagery of this solar flare and the associated high velocity
coronal mass ejection are available from the SOHO web site:
http://soho.nascom.nasa.gov/hotshots
A movie of the event in the light of hydrogen is also available from:
http://www.spacew.com/x30ha.gif
It is known that yesterdays remarkable solar flare was associated with a
coronal mass ejection. The vast majority of mass thrown out was directed well
to the west of the Earth. However, a small portion was also directed
Earthward. That portion is expected to impact the Earth on 06 November. After
the disturbance arrives, it may be capable of producing periods of minor to
major geomagnetic and auroral storm activity. A disturbance as large as was
observed on 29 and 30 October is not expected. Nevertheless, auroral activity
could become visible from many middle latitude locations. A middle latitude
aurora watch is active for 06 November. For North Americans, that is TONIGHT.
Late tonight, near or after local midnight. Interference from the near-full
moon will hamper attempts to view activity.
/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/
MIDDLE LATITUDE AURORAL ACTIVITY WATCH
WATCH ISSUED: 20:15 UTC, 05 NOVEMBER 2003
/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/
VALID BEGINNING AT: 00:00 UTC ON 06 NOVEMBER
VALID UNTIL: 23:00 UTC (7 pm EDT) ON 07 NOVEMBER
PREDICTED IMPACT TIME OF DISTURBANCE:
APPROX. 07:00 UTC ON 06 NOVEMBER, +/- AT LEAST SEVERAL HOURS SEVERAL
HIGH RISK PERIOD: 06 NOVEMBER (UTC DAYS)
MODERATE RISK PERIOD: 06 - 07 NOVEMBER
PREDICTED ACTIVITY INDICES: 12, 35, 20, 15 (05 NOVEMBER - 08 NOVEMBER)
POTENTIAL MAGNITUDE OF MIDDLE LATITUDE AURORAL ACTIVITY: MODERATE
POTENTIAL DURATION OF THIS ACTIVITY: MAIN BELT = 06 TO 12 HOURS
MINOR BELT = 12 TO 18 HOURS
ESTIMATED OPTIMUM OBSERVING CONDITIONS: NEAR AND AFTER LOCAL MIDNIGHT
EXPECTED LUNAR INTERFERENCE: MODERATE
OVERALL OPPORTUNITY FOR OBSERVATIONS FROM MIDDLE LATITUDES: FAIR TO GOOD
AURORAL ACTIVITY *MAY* BE OBSERVED APPROXIMATELY NORTH OF A LINE FROM...
NORTHERN OREGON TO NORTHERN WYOMING TO SOUTH DAKOTA TO SOUTHERN MINNESOTA
TO WISCONSIN TO MIGHIGAN TO NEW YORK STATE TO NEW HAMPSHIRE.
ACTIVITY *MAY* ALSO BE OBSERVED APPROXIMATELY NORTH OF A LINE FROM...
IRELAND TO CENTRAL UNITED KINGDOM TO EXTREME NORTHERN NETHERLANDS TO
EXTREME NORTHERN GERMANY TO SOUTHERN SWEDEN TO SOUTHERN FINLAND TO
NORTHERN RUSSIA.
ACTIVITY *MAY* ALSO BE OBSERVED APPROXIMATELY SOUTH OF A LINE FROM...
NEW ZEALAND AND EXTREME SOUTHEASTERN AUSTRALIA.
SYNOPSIS...
Effects of perhaps the largest x-ray solar flare on record are expected
to impact the Earth sometime near 07:00 UTC on 06 November, give or take
several hours. The solar flare occurred on the western limb of the Sun and as
a result is not expected to produce significant effects at the Earth.
However, the disturbance should have the strength to produce periods of
auroral storming over the high and middle latitude regions.
This watch will remain valid through 23:00 UTC (7 pm EDT) on
07 November. It will then be updated or allowed to expire. Most (if not all)
of the activity is expected to occur within the first 6 to 12 hours after the
disturbance impacts. For this reason, we don't expect very much on 07
November. For updated information, visit:
http://www.spacew.com/aurora/forum.html. For real-time plots of current
activity, visit: http://www.spacew.com/plots.html or www.sec.noaa.gov.
PLEASE REPORT OBSERVATIONS OF AURORAL ACTIVITY TO:
http://www.spacew.com/submitsighting.html
~MarciaH
Sat, Nov 29, 2003 (17:50)
#687
Thanks for posting the events, Terry! This was fantastic!!! Propagation was a poor as I thought it might be and airliners were kept below 25,000 feet and away from the poles to protect the passengers. I did hear that discussed by pilots and routing people.
~MarciaH
Sat, Nov 29, 2003 (17:51)
#688
DARK MATTER FORMS A GHOST UNIVERSE, NEW THEORY SHOWS
----------------------------------------------------
The "dark matter" that comprises a still-undetected one-quarter of the
universe is not a uniform cosmic fog, says a University of California,
Berkeley, astrophysicist, but instead forms dense clumps that move about
like dust motes dancing in a shaft of light.
http://spaceflightnow.com/news/n0311/06ghost/
TURBULENT NEIGHBORHOOD SEEN NEAR ERUPTIVE STAR
----------------------------------------------
A small portion of the rough-and-tumble neighborhood of swirling dust and
gas near one of the most massive and eruptive stars in our galaxy is seen
in this Hubble Space Telescope image. This close-up view shows only a
three light-year-wide portion of the entire Carina Nebula, which has a
diameter of over 200 light-years. Located 8,000 light-years from Earth,
the nebula can be seen in the southern sky with the naked eye.
http://spaceflightnow.com/news/n0311/06eruptivestar/
VOYAGER APPROACHING SOLAR SYSTEM'S OUTER LIMITS
-----------------------------------------------
NASA's Voyager 1 spacecraft is about to make history again. It is the
first spacecraft to enter the solar system's final frontier, a vast
expanse where wind from the sun blows hot against thin gas between the
stars: interstellar space.
http://spaceflightnow.com/news/n0311/05voyager/
ROSES IN THE SOUTHERN SKY
-------------------------
The two best known satellite galaxies of the Milky Way, the Magellanic
Clouds, are located in the southern sky at a distance of about 170,000
light-years. They host many giant nebular complexes with very hot and
luminous stars whose intense ultraviolet radiation causes the surrounding
interstellar gas to glow.
http://spaceflightnow.com/news/n0311/05roses/
PROPOSED NASA EXPLORER MISSIONS SELECTED FOR STUDY
--------------------------------------------------
NASA recently selected candidate mission proposals that would study the
universe, from Jupiter and the sun to black holes and dark matter. The
proposals are candidates for missions in NASA's Explorer Program of lower
cost, highly focused, rapid-development scientific spacecraft.
http://spaceflightnow.com/news/n0311/05smex/
~terry
Sun, Nov 30, 2003 (21:06)
#689
Where's the best place in Geo, Marci, to talk about the Earth's magnetic
storms. Is this topic worthy?
~terry
Mon, Dec 1, 2003 (20:39)
#690
http://news.bbc.co.uk/1/hi/sci/tech/3251382.stm
Dusty disc may mean other Earths
By Dr David Whitehouse
BBC News Online science editor
Astronomers say they have evidence for Earth-like planets orbiting a
nearby star, making it more like our own Solar System than any yet
discovered.
The star, Vega, is one of the brightest in the sky, only 25 light-years
away.
It is three times larger than our Sun and, at 350 million years old, much
younger as well.
Vega has a disc of dust circling it, and at least one large planet which
could sweep debris aside allowing smaller worlds like Earth to exist.
~MarciaH
Thu, Dec 4, 2003 (14:51)
#691
Here, or Mike's Gaia toopic. His is dedicated to ionospheric things and electromagnetic phenomena.
In a day or two, more CME ionization should reach us. Aurora watch!
~MarciaH
Thu, Dec 4, 2003 (14:52)
#692
I did hear about the Vega system - on Art Bell's program, no less.
~aa9il
Thu, Dec 4, 2003 (17:33)
#693
Vega was also the signal source area from 'Contact'
Also, the source for the Chevy Vega... ;)
de Mike
~terry
Thu, Dec 4, 2003 (19:02)
#694
Wow, Mike. That's right about the movie. Jodie Foster went to the Vegan
system. Or did she?
~terry
Tue, Dec 16, 2003 (15:55)
#695
Black holes are raining down on Earth and exploding!
http://uk.news.yahoo.com/031204/12/eg99n.html
Are mini black holes raining down through the Earth's atmosphere? It is
possible, says a team of physicists. They think this could explain
mysterious observations from mountain-top experiments over the past 30
years.
Ordinary black holes form when stars explode at the end of their lives.
The heavy stellar core can collapse into a superdense "singularity" whose
gravity is so strong that nothing - not even light - can escape.
If some of physicists' favourite theories about extra dimensions are
correct, it would also be possible for high-energy cosmic-ray particles
from space to create black holes when they collide with molecules in the
Earth's atmosphere ( New Scientist print edition, 29 September 2001).
These black holes would be invisibly small, with a mass of only 10
micrograms or so. And they would be so unstable that they would explode in
a burst of particles within around a billion-billion-billionth of a
second.
~pmnh
Wed, Dec 17, 2003 (22:14)
#696
a superdense "singularity" whose
gravity is so strong that nothing - not even light - can escape
finally, an explanation for bill o'reilly
~terry
Thu, Dec 18, 2003 (07:25)
#697
That's good Nick. That's good.
~terry
Sat, Dec 20, 2003 (11:55)
#698
The Euro Mars Mission will land Christmas Day:
http://www.esa.int/export/SPECIALS/Mars_Express/index.html
The lander sports "a pair of stereo cameras, a microscope, two types of
spectrometer (Mossbauer and X-ray) and a torch to illuminate surfaces. The
PAW also houses the corer/grinder and 'the mole', two instruments for
collecting rock and soil samples for analysis."
The NASA rovers will land Jan 3 and Jan 24:
http://mars.jpl.nasa.gov/mer
~MarciaH
Mon, Dec 22, 2003 (19:36)
#699
Christmas Sunset
Look west as night falls on Dec. 25th for a lovely pairing of brilliant
Venus and the crescent moon.
FULL STORY at
http://science.nasa.gov/headlines/y2003/09dec_sunset.htm?list89800
~MarciaH
Mon, Dec 22, 2003 (19:40)
#700
Thanks for the story on Mars landing. I deleted mine by accident!