End of the moon trail for GRAIL twins

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http://www.itwire.com – Written by: William Atkins | Published in: SpaceNASA is purposely crashing identical spacecraft, GRAIL Ebb and Flow, into the lunar surface on December 17, 2012 because their prime mission, and their extended one, too, has been successfully completed. A short video is provided to show their final path at the end of their mission. (IT news)