Michele Kearney's Nuclear Wire: Mars 2020 rover gets radioisotope fuel

Mars 2020 rover gets radioisotope fuel - World Nuclear News: Fuelling of a radioisotope-based power system for NASA's Mars 2020 rover has begun. The Multi-Mission Radioisotope Thermoelectric Generator - or MMRTG - uses heat from the natural radioactive decay of plutonium-238 to generate electricity as well as maintaining the rover's systems at the proper operating temperatures.