As scheduled, the Gravity Recovery and Interior Laboratory probes Ebb and Flow crashed into a mountain on the moon, ending a fruitful mission to study the surface and composition of the celestial body.
MORE: http://www.cnn.com/2012/12/17/us/nasa-moon-probes/index.html
See also...
NASA's GRAIL Lunar Impact Site Named for Astronaut Sally Ride
http://www.sciencedaily.com/releases/2012/12/121217181425.htm
