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Stories about: mascons

GRAIL to Determine Moon's Gravity In 2011, the world will see the launching of the new Gravity Recovery and Interior Laboratory (GRAIL) observatory, which is destined to become the first gravity-analysis machine on the Moon. Naturally, experts at NASA already know the force with which the satellite acts on incoming or orbiting spacecraft, and even on... 8 May 2009 03:08 GMT