A rock-strewn landscape is visible behind over the back of the Mars rover Perseverance.

Perseverance’s Radioisotope Thermoelectric Generator (RTG) on Mars

NASA’s Perseverance Mars rover, including its Multi-Mission Radioisotope Thermoelectric Generator (white cylinder with fins), is shown on sol 108 of its mission in this image from one of the rover’s navigation cameras. The rim of Adziilii Crater is visible in the upper right, with some of the rover’s recent wheel tracks to the upper left.

Credits: NASA/JPL-Caltech