Mars topography, gravity and crust

Référence de la vidéo 12081827
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.
Licence : Droits gérés
Crédit : Science Photo Library / NASA
Model Release : Non requis
Durée : 19 Secondes
Aspect ratio : 16/9
Restrictions : -

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