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首页月球壁纸 GRAIL Twin Spacecraft -- Crust to Core Artist Concept

GRAIL Twin Spacecraft -- Crust to Core Artist Concept

月球壁纸

by NASA/JPL

NASA Image Library · 公有领域（Public Domain）

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The Gravity Recovery and Interior Laboratory GRAIL mission utilizes the technique of twin spacecraft flying in formation with a known altitude above the lunar surface and known separation distance to investigate the gravity field of the moon.

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