The rover is upside down in this straight from the back view. The image is centered on a cylinder with fins, the spacecraft's Radioisotope Thermoelectric Generator.

Perseverance’s Radioisotope Thermoelectric Generator Before Launch

The Multi-Mission Radioisotope Thermoelectric Generator (MMRTG) for NASA'S Mars 2020 Perseverance rover is shown during a fit check with the rover in a payload processing facility at NASA's Kennedy Space Center in Florida on April 16-17, 2020.

Credits: NASA/JPL-Caltech/KSC/DOE