A Mars rover is parked among the tire tracks it made on Mars in this composite image.

Curiosity Rover’s Self Portrait at Mar’s ‘John Klein’ Drilling Site

This rectangular version of a self-portrait of NASA's Mars rover Curiosity combines dozens of exposures taken by the rover's Mars Hand Lens Imager (MAHLI) during the 177th Martian day, or sol, of Curiosity's work on Mars (Feb. 3, 2013). The rover is positioned at a patch of flat outcrop called "John Klein," which was selected as the site for the first rock-drilling activities. Curiosity carries a radioisotope power system, visible on the left of the rover (featuring the large white fins). This power system, known as a Multi-Mission Radioisotope Thermoelectric Generator (or MMRTG), produces a dependable flow of electricity using the heat emitted from the natural radioactive decay of plutonium oxide as its "fuel."

Credits: NASA/JPL-Caltech/MSSS