English: Once NASA's InSight Mars lander enters the Martian atmosphere and approaches the planet's surface, propulsive landing gear will slow the spacecraft down to about 5.5 mph (8.8 km/h) and safely set it down on the surface of the Red Planet. This image, taken at Lockheed Martin Space in Littleton, Colorado, shows several of the critical landing systems including the thrusters, lander legs and science deck.