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The End Is Near for NASA’s Voyager Probes

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Summary
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77% Informative

The Voyager 1 and 2 spacecraft are equipped with three radioisotope thermoelectric generators.

Each RTG contains 24 plutonium-238 oxide spheres with a total mass of 4.5 kilograms .

Plutonium-238 is an unstable isotope, which means it undergoes radioactive decay.

Nuclear batteries have a maximum lifespan of 60 years .