The GRAIL mission was launched in September 2011 for mapping lunar gravity between March and May this year. The crash data will reveal more information on the composition of the noon.
Rocket burns nudged GRAIL probes Ebb and Flow into a orbit designed to crash them into the side of a mountain at around 2:28 p.m. Pacific standard time on last Friday. NASA has named the crash site after late astronaut Sally Ride, America's first woman in space.