Four months after the launch, tomorrow LCROSS will smash into the moon. Specifically, it will crash into a Dark Crater at the moon’s south pole, in an effort to find water on the moon. Locating a local source of water is critical for extended manned missions and habitation there. Details about the chances to see these events yourself can be found here, including a link to NASA TV Online, where you can watch the event live beginning at 3:15AM PDT, 6:15AM EDT.