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NASA's Moon-Crashing Spacecraft Gets New Crater Target

 
Anonymous Coward
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09/28/2009 08:33 PM
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NASA's Moon-Crashing Spacecraft Gets New Crater Target
[link to news.yahoo.com]

A NASA spacecraft destined to crash into a moon crater in the hunt for hidden caches of water ice has a new target, the space agency announced Monday.

The decision means that NASA's LCROSS probe and its spent Centaur rocket stage will now crash into the large crater Cabeus, and not the nearby (and smaller) Cabeus A crater previously targeted, when they slam into the moon on Oct. 9.

Scientists pulled the lunar switcheroo based on a continuing analysis of data from recent moon-watching spacecraft. The data suggests the new target Cabeus has the highest concentration of hydrogen - an indication of possible water ice - than anywhere else at the lunar south pole.

"The LCROSS team concluded that Cabeus provided the best chance for meeting its mission goals," mission managers said in a statement.

The news comes less than a week after scientists announced the discovery of water on the moon in the form of water molecules bound to the lunar dirt.

Cabeus is a large crater about 60 miles (98 km) in diameter that sits at 84.9 degrees south, 35.5 degrees west at the moon's south pole. It has two nearby satellite craters: the 25-mile (40-km) wide Cabeus A - LCROSS' original target - and Cabeus B, which is about 38 miles (61 km) in diameter.

A small valley etched into the otherwise tall crater ridge of Cabeus should allow sunlight to shine on the ejecta cloud kicked up when LCROSS and its Centaur rocket stage crash into the moon in successive impacts. The shadow of a large hill along the ridge should provide enough contrast for Earth-based measurements of the plume's composition, NASA officials added.

"During the last days of the mission, the LCROSS team will continue to refine the exact point of impact within Cabeus crater to avoid rough spots, and to maximize solar illumination of the debris plume and Earth observations," NASA officials said.

NASA's LCROSS probe - officially known as the Lunar Crater Observation and Sensing Satellite - is actually a pair of vehicles headed for what maybe one of the most watched cosmic collisions in history. The mission is aimed at the permanently shadowed craters of the moon, where scientists think water ice may exist untouched by the sun's rays.

The $79 million mission launched in June along with NASA's powerful Lunar Reconnaissance Orbiter as part of the agency's first new missions to explore the moon. Finding usable water ice on the moon would be a boon for future manned missions to the lunar south pole since it could be used as a resource to supply astronauts with drinking water, or be split into oxygen and hydrogen to create rocket fuel.

[link to www.space.com]

Last Edited by Phennommennonn on 02/28/2012 08:07 AM
Anonymous Coward (OP)
User ID: 771897
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09/28/2009 08:33 PM
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Re: NASA's Moon-Crashing Spacecraft Gets New Crater Target
Why they change the target soo fast?

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