NASA's InSight lander is on its way to Mars

It's the first NASA mission that will study the Martian interior.

The first NASA mission that will look into the Martian interior is now on its way to the red planet. NASA's Mars InSight lander has launched on top of a ULA Atlas V rocket and is a historic launch in several ways. In addition to being the agency's first spacecraft to study the Martian subsurface, it's NASA's first lander since the Phoenix arrived on the planet in 2008. The Curiosity followed the Phoenix four years later, but as we all know, the car-sized spacecraft that loves taking selfies is a rover.

InSight is also the first NASA interplanetary mission to launch from the West Coast, particularly from Space Launch Complex 3E at the US Air Force Vandenberg Base. After it arrives on the planet on November 26th, (around 3PM Eastern time), it will deploy a seismometer and a heat probe to detect Marsquakes and monitor the flow of heat. Its findings will help us better understand what's underneath the Martian surface, such as how thick its crust is. The data it sends back could also shed light on how rocky planets and their natural satellites are formed -- including our own.