Radioisotope Thermoelectric Generators
Radioisotope Thermoelectric Generators (RTGs) are devices that generate electrical power from the heat produced by the natural radioactive decay of isotopes, such as plutonium-238. RTGs have been used as power sources in space missions where solar power is not feasible, such as missions to the outer planets and deep space probes. The heat produced by the decay of the isotopes is converted into electricity by thermocouples, which are devices that convert temperature differences into electrical voltage. RTGs are preferred over other power sources in space missions because they are reliable, have a long lifespan, and can operate in harsh environments, such as extreme temperatures and radiation. However, RTGs also pose a risk of radioactive contamination in case of an accident during launch or re-entry.
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