NASA’s Lunar Crater Observation and Sensing Satellite is scheduled to drop its Centaur upper-stage rocket on the lunar surface at 7:31 a.m. ET (12pm BST).
NASA hopes the impact will kick up enough dust to help the LCROSS probe find the presence of water in the moon’s soil. Four minutes later, the LCROSS will follow through the debris plume, collecting and relaying data back to Earth before crashing into the Cabeus crater near the moon’s south pole.
The LCROSS is carrying spectrometers, near-infrared cameras, a visible camera and a visible radiometer. These instruments will help NASA scientists analyze the plume of dust — more than 250 metric tons’ worth — for water vapor.
The orbiting Hubble Space Telescope and NASA’s Lunar Reconnaissance Orbiter will watch, and photograph, the collisions. And hundreds of telescopes on Earth also will be focused on the two plumes.
NASA is encouraging amateur astronomers to join the watch party.
“We expect the debris plumes to be visible through midsized backyard telescopes — 10 inches and larger,” said Brian Day at NASA’s Ames Research Center at Moffett Field, California. Day is an amateur astronomer who is leading education and public outreach for the LCROSS mission.
“The initial explosions will probably be hidden behind crater walls, but the plumes will rise high enough above the crater’s rim to be seen from Earth,” Day said. The Cabeus crater lies in permanent shadow, making observations inside the crater difficult.
Source: CNN
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