Slooh, a service that offers access to two huge earth-based telescopes, is inviting folks to watch the LCROSS impact on Friday at 4:30am PDT or 7:30am EDT. The feed begins at 3:30am PDT. NASA is also transmitting the impact live.

The Lunar CRater Observation and Sensing Satellite will help assess how large bodies will damage planets along with an assessment of current water levels in the moon.