Lunar
CRater Observation and Sensing Satellite (LCROSS)
The Mission Objectives of the Lunar
Crater Observation and Sensing Satellite (LCROSS) include confirming
the presence or absence of water ice in a permanently shadowed
crater at the Moon’s South Pole. The identification of
water is very important to the future of human activities on
the Moon. LCROSS excavated the permanently dark floor of
one of the Moon’s polar craters (Cabeus) in 2009 to test
the theory that ancient ice lies buried there. The impact ejected
material from the crater’s
floor to create a plume that specialized instruments have been
able to analyze for the presence of water (ice and vapor), hydrocarbons
and hydrated materials.
LCROSS also provides technologies and modular, reconfigurable
subsystems that can be used to support future mission architectures.
Ames
Research Center (ARC) managed the mission, conducting
mission operations and developing the payload instruments,
while Northrop Grumman designed and built the spacecraft for
this innovative mission. Ames
mission scientists were responsible for spearheading
the data analysis. This was a fast-paced, low-cost, mission
that leveraged some existing NASA systems, Northrop-Grumman
spacecraft expertise, and Ames’ Lunar
Prospector
experience.
LCROSS and LRO launched on Thursday, June 18, 2009 @ 5:32 pm
Eastern Time. LCROSS traveled to the Moon as a co-manifested
payload aboard the launch vehicle for the Lunar
Reconnaissance Orbiter (LRO). LRO is designed to map the
lunar surface and characterize landing sites for future missions.
Moving at a speed of more than 1.5 miles per second, the Centaur
upper stage hit the lunar surface shortly after 4:31 a.m. PDT
on October 9, 2009, creating an impact that instruments aboard
LCROSS observed for approximately four minutes. LCROSS then impacted
the surface at approximately 4:36 a.m. PDT.
Why
LCROSS?
Just like on Earth, water is a crucial resource on the Moon.
It will not be practical to transport to space the amount of
water needed for human and exploration needs. It is critical
to find natural resources, such as water, on the Moon. The
Lunar Crater Observation and Sensing Satellite (LCROSS) mission
begins the search for water, leveraging the information we
learned from the Clementine and Lunar
Prospector missions.
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Download the LCROSS
Fact Sheet.
“Many years ago the great British
explorer George Mallory, who was to die on Mount Everest,
was asked why did he want to climb it. He said, ’Because
it was there.’
Well, space is there, and we’re going to climb
it, and the Moon and the planets are there, and new
hopes for knowledge and peace are there.”
President John F. Kennedy
Address at the Rice University on the Space Effort
September 12, 1962
Learn more about the mission through the LCROSS
Frequently Asked Questions, answered by LCROSS
Principal Investigator, Tony Colaprete.
Moon Trivia
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