Credit: NASA/SCIENCE PHOTO LIBRARY

Caption: Topography, gravity and crustal thickness maps of Mars. Animated rotating Mars globes showing (left to right) surface elevation, free-air gravity variation and crustal thickness. The elevation map uses data from Mars Global Surveyor's Mars Orbiter Laser Altimeter. The free-air gravity map was created by studying variations in the orbits of Mars Global Surveyor, Mars Odyssey, and Mars Reconnaissance Orbiter spacecraft. The crustal thickness map is obtained by subtracting the gravitational effects of the uneven Martian surface from the free-air gravity map, revealing the gravity anomalies caused by underlying material. These gravity anomalies can be explained by variations in the thickness of the crust: local increases in gravity indicate places where the denser mantle is closer to the surface, and hence where the crust is thinner.

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Keywords: 10 seconds or greater, altitude, animated, animation, anomalies, anomaly, areology, bar, black background, color, colour, coloured, comparison, crater, craters, crust, crustal thickness, eastern, elevation, false, false-color, false-colour, feature, field, free air, free-air, from space, geographical, geography, geological, geology, global, globe, gmm 3, goddard mars model, gravitational, gravity, gravity map, hemisphere, key, mantle, map, mapping, mars, mars global surveyor, mars observation, mars odyssey, mars orbiter camera, mars orbiter laser altimeter, mars reconnaissance orbiter, martian, mgs, mola, mro, no-one, nobody, ody, planetary science, rotating, rotation, scale, solar system, surface, topographic, topography, valles marineris, variation, western

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Mars topography, gravity and crust

K005/6264 Rights Managed

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Duration: 00:00:19.28

Frame size: 1920x1080

Frame rate: 30

Audio: No

Format: QuickTime, Photo JPEG 100%, progressive scan, square pixels

File size: 479.1M

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Capture format: QuickTime Animation

Codec: H.264

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