An image from NASA’s InSight lander shows the probe’s robotic arm putting a seismometer on Mars. This is the first time a seismometer has been placed onto the surface of another planet. (NASA / JPL-Caltech Photo)More

After three weeks of checking out the scene on the Red Planet, NASA’s InSight lander has placed its first scientific instrument on the Martian surface.

The probe’s robotic arm pulled InSight’s seismometer, known as the Seismic Experiment for Interior Structure

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