In case anyone was curious Both Voyager probes power themselves with radioisotope thermoelectric generators (RTGs), which convert heat from decaying plutonium

In case anyone was curious Both Voyager probes power themselves with radioisotope thermoelectric generators (RTGs), which convert heat from decaying plutonium into electricity. The continual decay process means the generator produces slightly less power each year https://www.jpl.nasa.gov/news/nasas-voyager-will-do-more-science-with-new-power-strategy https://www.jpl.nasa.gov/news/nasas-voyager-will-do-more-sci...