This is exciting stuff!
This is the first mission dedicated to studying the deep interior of Mars.
InSight, short for Interior Exploration using Seismic Investigations, Geodesy and Heat Transport (That's a mouthful I'll stick with InSight lol).
InSight's science mission won't begin right away though. It will take between two to three months for the robotic arm to place the mission's instruments on the surface. Meanwhile, mission scientists will photograph what can be seen from the lander's perspective and monitor the environment.
Watch the live coverage going on now at www.nasa.gov/live.