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NASA images show Moon's battered beginnings

Pictures released from NASA's GRAIL mission show how the Moon has been shaped by bombardments of space rocks over billions of years. NASA spacecraft Ebb and Flow orbited the moon 35 miles above the surface, allowing the spacecraft to measure deep into the moon from detailed gravity mapping. The battered interior just below the Moon's surface shows how similar planets, including Earth, could also have suffered from impact. The mission has also found the Moon's crust to be thinner than previously thought, at only 25 miles thick.

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