Multi-Mission Radioisotope Thermoelectric Generator (MMRTG) Pull-Apart Animation
Animation of the components of a Multi-Mission Radioisotope Thermoelectric Generator (MMRTG) power system.
March 17, 2025
| Credit | NASA/JPL-Caltech |
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A Multi-Mission Radioisotope Thermoelectric Generator (MMRTG) is a type of space nuclear power system that converts heat into electricity using no moving parts.
MMRTGs were designed with the flexibility to operate on planetary bodies with atmospheres, such as at Mars, as well as in the vacuum of space. An MMRTG generates about 110 watts of electrical power at launch.