![]() Includes shaded relief of surface features. Moon Bouguer gravity maps in a cylindrical projection suitable for spherical texture mapping. Versions of the map are provided which either include or omit lower harmonic degrees corresponding to large features in the gravity field. Moon free-air gravity maps in a cylindrical projection suitable for spherical texture mapping. Print-res still of the LOLA lunar topography globe, centered on 120 degrees west longitude. Print-res still of the lunar crustal thickness globe, centered on 120 degrees west longitude. The data is high-pass filtered to emphasize smaller features. Print-res still of the Bouguer lunary gravity globe, centered on 120 degrees west longitude. Print-res still of the free-air lunar gravity globe, centered on 120 degrees west longitude. Rotating Moon globe showing topography as measured by LOLA on LRO. Rotating Moon globe showing crustal thickness. Rotating Moon globe showing Bouguer gravity. Rotating Moon globe showing free-air gravity as measured by GRAIL. The Bouguer map is filtered to emphasize smaller features. Side-by-side rotating Moon globes showing Bouguer gravity and crustal thickness. Side-by-side rotating Moon globes showing LOLA elevation and GRAIL free-air gravity.This video is also available on our YouTube channel. ![]() ![]() Merely for plausibility, the sun angle and starry background are accurate for specific dates (December 21, 2012, 0:00 UT and January 8, 2013, 14:00 UT, respectively). The digital elevation model for the terrain is from the Lunar Reconnaissance Orbiter laser altimeter ( LOLA). The large, multi-ringed impact feature near the center is Mare Moscoviense. They are centered on lunar coordinates 29°N 142☎. These views show a part of the Moon's surface that's never visible from Earth. On the map, dark purple is at the low end of the range, at around -400 mGals, and red is at the high end near +400 mGals. The deviations are measured in milliGals, a unit of acceleration. The free-air gravity map shows deviations from the mean, the gravity that a cueball Moon would have. Spacecraft in orbit around the Moon experience slight variations in gravity caused by both of these irregularities. But like other rocky bodies in the solar system, including Earth, the Moon has both a bumpy surface and a lumpy interior. If the Moon were a perfectly smooth sphere of uniform density, the gravity map would be a single, featureless color, indicating that the force of gravity at a given elevation was the same everywhere. They show the free-air gravity map developed by the Gravity Recovery and Interior Laboratory ( GRAIL) mission. ![]() These print-resolution stills were created for the cover of the Februissue of Science. ![]()
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