The "keys" to NASA's Mars rovers are in the capable hands of the official rover drivers. Learn how they operate the vehicles from millions of miles away in this 60-second video from NASA's Jet Propulsion Laboratory.


First of all, there's no joystick for driving a Mars rover!

Before a rover "hits the road," engineers send computer commands overnight, telling it where to go the next day. Depending on how tricky the terrain is, rover drivers have two options.

They can send a string of specific commands like: "Drive forward 5 meters; then turn right 90 degrees." The rover turns its wheels enough times to add up to 5meters, then turns in place.

Or if it looks safe, they can let the rover think on its own. They write commandslike: "See that rock over there? Find your way there safely." Then, using twocameras like human eyes, the rover gets a 3D view of hazards such as largerocks and steep slopes. After mapping the danger zones, it plots the safest route to avoid them.

Either way, did the rover complete its drive as planned? Engineers double-check when the rover sends back a “postcard” of its new spot on Mars!
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