For local astronomy buffs

[sfc_oliver]

http://www.scientificamerican.com/article.cfm?id=nasas-mission-to-bomb-the-moon-2009-06

[Towntalk]

NASA to Bomb the Moon Friday

You can watch it at 7:30 a.m. ET. Provided weather conditions permit.

At approximately 7:25 a.m., the first satellite is scheduled to crash into the moon, creating a crater and a cloud of dust and debris that will rise above the lunar surface.
At 7:30 a.m., the second satellite will fly through the debris — analyzing it and the lunar surface to determine the presence of hydrated minerals and potentially water — before it impacts the moon.