SchrodingerZ writes "After their yearlong mission to map the Moon's gravitational field, twin probes Ebb and Flow crashed into the lunar surface, ending the GRAIL mission. The crashes were controlled events, each impacting 30 seconds apart from each other. The twin spacecraft were running low on maneuvering fuel and NASA, not wanting the craft to fall on historical sites such as the Apollo landing sites, redirected their flight patterns to impart the far (dark) side of the moon. Their impact sites were named after Sally Ride, the first American woman in space. 'During the news conference last week, Maria T. Zuber, the principal investigator, said the probes would be crashing into a "non-sunlit" part of the surface.' When the site becomes sunlit again in several weeks, the Lunar Reconnaissance Orbiter will attempt to take pictures of the craters the probes undoubtedly made in the lunar soil."