A final location has been decided for the two-part lunar crash probe, part of the mission known as LCROSS (Lunar CRater Observation and Sensing Satellite), "On 9 October, at around 11:30 GMT, LCROSS will send its Atlas V's Centaur rocket upper stage towards the lunar surface (see pic). Four minutes after impact, LCROSS will descend through the plume using two "two near-infrared spectrometers, a visible light spectrometer, two mid-infrared cameras, two near-infrared cameras, a visible camera and a visible radiometer" to sniff the resulting chemical mix." (http://www.theregister.co.uk/2009/09/29/lcross_retargeted/ )
The LCROSS probe itself will then crash into the moon. The hope is that it will find evidence of water.
Well it all went as planned, and information about the event from NASA can be found at http://www.nasa.gov/mission_pages/LCROSS/main/index.html
A great video simulation can be found at http://www.nasa.gov/mov/391565main_LCROSS-MediaPreview.mov
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