- Original Caption Released with Image:
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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 in unprecedented detail. The technique utilizes
radio links between the two spacecraft as well as radio links to stations
on Earth. The mission also will answer longstanding questions about Earth's
moon, including a possible inner core, and provide scientists with a
better understanding of how Earth and other rocky planets in the solar
system formed. GRAIL is a part of NASA's Discovery Program.
- Image Credit:
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NASA/JPL
Image Addition Date:
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2009-05-18
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