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The Bruce Murray Space Image Library

GRAIL's map of the lunar Bouguer gravity anomaly

Filed under explaining science, the Moon, GRAIL, gravity

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GRAIL's map of the lunar Bouguer gravity anomaly These maps of the moon show the "Bouguer" gravity anomalies as measured by NASA's GRAIL mission. Bouguer gravity is what remains from the gravity field when the attraction of surface topography is removed, and therefore represents mass anomalies inside the moon due to either variations in crustal thickness or variations in crust or mantle density. Red areas have stronger gravity, while blue areas have weaker gravity.

NASA / JPL / GSFC / MIT

Original image data dated on or about December 5, 2012

 

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