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Gravity Recovery and Interior Laboratory
GRAIL
Launch vehicle Delta II
Launch date 2011 September

10

Object(s) Moon


The Gravity Recovery And Interior Laboratory (GRAIL) mission is a dual spacecraft effort designed to determine the structure of the lunar interior and to advance understanding of the thermal evolution of the Moon. The primary science objectives are to: map the structure of the crust and lithosphere; understand the Moon's asymmetric thermal evolution; determine the subsurface structure of impact basins and the origin of mascons, ascertain the temporal evolution of crustal brecciation and magmatism; constrain deep interior structure from tides; and place limits on the size of the possible inner core. The GRAIL mission was selected through the NASA Discovery Program.

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