NASA's Knowledge rocket effectively arrives following 'seven minutes of dread NASA's most recent Mars lander, Understanding, effectively contacted down on the surface of the Red Planet this evening, enduring an extreme dive through the Martian air. It denotes the eighth truly amazing arriving on Mars for NASA, adding to the space organization's great reputation of putting the shuttle on the planet. Furthermore, now, Understanding's two-year mission has started, one that involves tuning in for Marsquakes to find out about the world's inside.