NASA is starting work on the new Mars rover that is scheduled to be launched in 2020.

NASA technicians have officially begun the assembly, test and launch operations (ATLO) phase of development on the agency’s next Mars rover, keeping the project on track for an expected 2020 launch.

The Mars 2020 rover is coming together at the Spacecraft Assembly Facility High Bay 1 at NASA’s Jet Propulsion Laboratory (JPL) in Pasadena, California. There, technicians are working on the rover’s descent stage, “a rocket-powered ‘sky crane’ that will lower the rover to the planet’s surface,” according to a March statement from NASA.

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