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Exploring the Moon's gravity: NASA's GRAIL mission

Dr Amanda Doyle, Feature writer
31 December 2011, 0:00 UTC

NASA's GRAIL (Gravity Recovery And Interior Laboratory) mission, with its twin spacecraft Ebb and Flow orbiting the Moon and gathering data, aims to discover more about the interior of our Moon and will use precise measurements of gravity to reveal what the inside of the Moon is like.

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