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by jjtheblunt 726 days ago
Is solar the only source of power on long spacecraft journeys, like that of Voyager and so on?
2 comments

No, Voyager uses a radioactive battery. The sun is already way too far away for Voyager, to provide enough energy.
Voyager doesn't use solar power since its incredibly faint as you get further from the Sun. It uses the heat from the decay of radioactive plutonium to generate electricity.