NASA's Lunar Prospector first detected some hydrogen signatures in craters on the dark side of the moon in 1999. Ever since, researchers have been keen to confirm the presence of water on the moon. The Lunar CRater Observing and Sensing Satellite (LCROSS) is tasked with crashing through the mists of speculation and conjecture and discover the truth. And you can watch all the action as it happens.
LCROSS was launched on June 18th and executed a fly-by of the moon five days later before entering into a wide orbit. On Friday October 9th, the craft will start to make its final approach, not to land but to crash land. The upper stage rocket in front, the Centaur, will separate from LCROSS which will, in turn, slow down a little. Creating a four minute gap between each vessel, the Centaur will crash into the Cabeus crater at the Moon's south pole. The heavy impact will create a great plume of debris.
Following behind, the LCROSS will pass through the debris, collecting and relaying data back to Earth before itself impacting the crater. As well as a visible camera and radiometer, the LCROSS payload also includes two near-infrared spectrometers, a visible light spectrometer, two mid-infrared cameras and two near-infrared cameras.