NASA’s Mars 2020 Comes Full Circle

Engineers took NASA’s Mars 2020 for a spin on Aug. 29, 2019. The 2,300-pound (1,040-kilogram) Martian vehicle was rotated clockwise and counterclockwise at about 1 revolution per minute on what is called a spin table in the clean room of the Spacecraft Assembly Facility at NASA’s Jet Propulsion Laboratory in Pasadena, California. (The rotation was speeded up in the video above.) The engineers were looking for the rover’s center of gravity, or the point at which weight is evenly dispersed on all sides.

Establishing the rover’s center of gravity is a key part of the assembly process and helps ensure that the spacecraft travels smoothly from launch to entry, descent and landing on Mars as calculated. Engineers can add weights in order to help balance out the vehicle. In the end, they affixed nine tungsten weights totaling 44 pounds (20 kilograms) to the rover chassis at predetermined attachment points to get the center of gravity just right.

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