What is powering the Voyager 1? It has been travelling in the space for almost 50 years.
In: Technology
A [radioisotope thermoelectric generator](https://en.wikipedia.org/wiki/Radioisotope_thermoelectric_generator). It’s a bunch of fissile material that slowly decays and releases heat. A thermoelectric device uses the temperature difference between that and a radiator to generate electricity.
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