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[music] Narrator: On October 9, 2009, a Centaur rocket impacted the Moon, followed

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soon by NASA's LCROSS spacecraft. NASA's Lunar Reconnaissance Orbiter

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was there, both to help pick the location of the impact, and to observe the resulting debris and

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vapor cloud. First, an impact site had to be selected. Data from

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LRO's LEND and Diviner instruments helped pick a good location--LEND to find a

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probable source of hydrogen, and Diviner to pick a cold, permanently shadowed region likely

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to contain certain volatiles. Once the impact occurred, these same instruments,

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along with LRO's LAMP instrument, observed the impact. LAMP revealed the

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presence of molecular hydrogen, carbon monoxide, and other materials,

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Diviner measured a noticeable change in thermal radiation coming from the site, and LEND

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reported the presence of hydrogen. All in all, these results both complement

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LCROSS findings and pave the way for future study of Earth's own satellite.

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