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[music] Narrator: On October 9, 2009, a Centaur rocket impacted the Moon, followed
soon by NASA's LCROSS spacecraft. NASA's Lunar Reconnaissance Orbiter
was there, both to help pick the location of the impact, and to observe the resulting debris and
vapor cloud. First, an impact site had to be selected. Data from
LRO's LEND and Diviner instruments helped pick a good location--LEND to find a
probable source of hydrogen, and Diviner to pick a cold, permanently shadowed region likely
to contain certain volatiles. Once the impact occurred, these same instruments,
along with LRO's LAMP instrument, observed the impact. LAMP revealed the
presence of molecular hydrogen, carbon monoxide, and other materials,
Diviner measured a noticeable change in thermal radiation coming from the site, and LEND
reported the presence of hydrogen. All in all, these results both complement
LCROSS findings and pave the way for future study of Earth's own satellite.
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