![](http://www.alamy.com/thumbs/6/853AC30B-609E-44A8-B1F0-368A25826BD0/2K5D556.jpg)
NASA's InSight Mars lander uses a seismometer to study the inner layers of Mars. Seismic signals from quakes change as they pass through different kinds of materials; seismologists can read the squiggles of a seismogram to study the properties of the planet's crust, mantle, and core. This infographic shows those layers, and how InSight uses quakes to study them. It also shows a close-up of InSight and the major sources of marsquakes. Most quakes are created by heat and pressure inside the planet, which cause rock to fracture; another source is meteors striking the surface.
Size: 4801px × 2700px
Photo credit: © NASA/piemags / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., insight, mars