WASHINGTON
— A NASA spacecraft slammed into the moon Friday, blasting out a
curtain of debris in which scientists hope to detect signs of water ice.
The $79
million LCROSS spacecraft, preceded by its Centaur rocket stage, impacted
the lunar surface at the large south pole crater Cabeus at 7:31 a.m. EDT
(1131 GMT) in what NASA Chief Scientist Jim Garvin called "the ultimate
physics experiment."
"We
keep finding evidence that there is water [on the moon]," NASA
Administrator Charles Bolden told SPACE.com here. To find more with LCROSS
"would be incredibly good news. It would be another place we can send
humans," he added. Bolden said he had been following the last steps of the
mission throughout the night.
Mission
scientists watched the crash primarily from the probe's operations center at
NASA's Ames Research Center in Moffett Field, Calif., but astronomers and amateur
skywatchers also tuned in at observatories and other sites around the world —
including here at the Newseum, where the public watched the NASA impact
broadcast on a huge 40-foot screen.
"This
is the biggest screen I've ever seen," said one of the scores of people in
the crowd of NASA employees, members of the press and public, including several
bleary-eyed children.
Among the
crowd were Apollo 11 astronaut Buzz Aldrin and Chip Cronkite, the son of late
CBS TV news anchor Walter Cronkite, to whom the mission is dedicated.
"We
hope this is just the first of many oases we find," Cronkite said.
Ice on
the moon
Scientists
think that pockets of water ice might exist in the permanently shadowed craters
of the lunar south pole — thought to potentially be the coldest places in the
solar system. Water has already
been detected on the moon by a NASA-built instrument on board India's now
defunct Chandrayaan-1 probe and other spacecraft, though it was in very small
amounts and bound to the dirt and dust of the lunar surface.
NASA plans
to return astronauts to the moon by 2020 for extended missions on the lunar
surface. Finding usable amounts of ice on the moon would be a boon for that
effort since it could be a vital local resource to support a lunar base.
The LCROSS impact
was also watched
by several satellites that normally monitor Earth and spacecraft like the
Hubble Space Telescope, Sweden's Odin observatory and LCROSS's sister
spacecraft, the Lunar Reconnaissance Orbiter (LRO), which were due analyze the
debris after the impact to look for signs of water ice.
"All
eyes are on LCROSS today," Bolden said during remarks before the impact.
NASA
launched LCROSS and the LRO orbiter in June to hunt for evidence of water and
ice on the lunar surface.
The LCROSS
probe beamed live images and data of its Centaur rocket stage's impact before
making its own death plunge four minutes later. The crashes were expected to
kick up tons of moon dirt and carve a new crater within the 60-mile (98-km)
wide Cabeus. That new crater could be as large as 66 feet (20 meters) wide and
13 feet (4 meters) deep.
Some 350
tons of moon dirt was expected to be blasted nearly 6.2 miles (10 km) above the
lunar surface. Unlike past moon crashes by other probes, like Japan's recent
Kaguya mission, LCROSS slammed into the lunar surface at a steep angle to kick
material up high enough to be illuminated by the sun as seen from Earth and other
spacecraft.
Seasoned
skywatchers on Earth equipped with 10 to 12-inch telescopes had a chance to
spot the crash on their own, if they knew where to look.
"There's
not going to be these grand, spectacular images of ejecta flying, kind of what
you've seen in animations or cartoons," LCROSS principal investigator Tony
Colaprete told reporters Thursday. "It's going to be more of a muted shimmer of
light, but that muted shimmer of light contains all the information we need to
answer our questions."
Scientists
don't know yet whether or not they've detected water in the LCROSS ejecta, as
it is expected to take some several days to analyze the data.
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Original Story: KAPOW! NASA Smacks the Moon in Search for Water IceSPACE.com offers rich and compelling content about space science, travel and exploration as well as astronomy, technology, business news and more. The site boasts a variety of popular features including our space image of the day and other space pictures,space videos, Top 10s, Trivia, podcasts and Amazing Images submitted by our users. Join our community, sign up for our free newsletters and register for our RSS Feeds today!