Watch InSight's successful landing on Mars: Difference between revisions

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Line 78: [[Image:Viking mars quake.jpeg\|thumb\|center\|400px\|Possible Mars quake from Viking sol 8. If it was, the P and S waves are labeled and 2 and 3 are possible reflections from the bottom of the Mars crust. This is the only previous recording of a possible Mars quake as Viking 1 didn't deploy properly and the Viking 2 one wasn't sensitive enough to detect the quakes InSight hopes to find. NASA-JPL]] [[~~File~~Image:The Martian interior.jpg\|thumb\|~~none~~center\|400px\|Artist's depiction of possible interiors for Mars which the Insight Lander mission will explore<br><br>Mars has an iron-rich core, silicate mantle, thin silicate crust and atmosphere. The thickness of the crust can be estimated using variations in gravitational field experienced by orbiters, and the topography maps from the Mars Global Surveyor laser altimeter. However the results depend on the density contrasts between core and mantle and are not unique, and there may also be further unresolved layering From geophysical models there may be two or more phase changes in the minerals that make up its interior. The satellite measurements seem to indicate a large and possibly liquid core but its size is not known.<br><br>