GRAIL Mission Coming To Close

Twin Probes Ebb & Flow To Impact Moon Surface On 17 Dec Ending Successful US$496M Mission; Launched Sep 2011, Crafts Arrived In Lunar Orbit Last New Year’s Eve / New Year’s Day; Provided Ultra-Precise Measurements To Construct Accurate Map Of Lunar Gravity Field; Showed Moon Crust Completely Pulverized Suggesting More Violent Early History Of Inner Solar System Than Previously Believed; NASA To Host Press Conference 13 Dec To Discuss Impact

Image Credit: NASA, ESA