https://www.cnet.com/news/nasas-mars-insight-rockets-towards-the-red-planet-from-vandenberg/

Mars InSight, which stands for Interior Exploration using Seismic Investigations, Geodesy and Heat Transport, is NASA's first interplanetary mission to leave from the west coast of the US. 

The lander will spend at least two years "listening" to the interior of Mars as it measures the planet's subsurface heat and detects Marsquakes. The goal is to develop a map of sorts of the planet's interior and hopefully gain insights into the formation of other rocky planets, including Earth.