MMRTGMulti Mission Radioisotope Thermoelectric Generator
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The MMRTG, which has a design life of 14 years, has been built to operate in a range of harsh environments, from the vacuum of deep space to extreme planetary surface atmospheres.
The MMRTG is being used for the first time on the Curiosity mission.
The first planned mission that will use the new MMRTG power system is the Mars Science Laboratory, a mobile laboratory rover currently scheduled for launch to the Red Planet in 2009.