Say goodbye to the moon as we know it. NASA is going to bomb it tomorrow.
NASA’s Lunar Crater Observation and Sensing Satellite (LCROSS) mission will come to a dramatic conclusion at approximately 4:30 a.m. PDT (7:30 a.m. EDT) on Friday, Oct 9, 2009, with the impact of the LCROSS Centaur upper stage rocket and four minutes later, the impact of the LCROSS Shepherding Spacecraft into Cabeus crater near the moon’s south pole.

To mark the event, NASA Ames Research Center is hosting ‘LCROSS Impact Night.’ News media are invited to cover the three-part event that is open to the public and free of charge.

NASA wants to analyze the debris that the impact of the rocket causes on impact to see what they find - water for instance.
More details on the NASA LCROSS site. Update: LCROSS Mission successfully bombed the moon.