Artist rendition of the formation of rocky bodies in the solar system -- how they form and differentiate and evolve into terrestrial planets.

InSight, short for Interior Exploration using Seismic Investigations, Geodesy and Heat Transport, is a lander designed to give Mars its first thorough check up since it formed 4.5 billion years ago. It is scheduled to launch from Vandenberg Air Force Base on the California coast between May 5 through June 8, 2018, and land on Mars six months later, on Nov. 26, 2018.

For more information, see http://insight.jpl.nasa.gov/.