NASA's twin Voyager spacecraft are very low on power after nearly 50 years. How long can they keep going?

The pioneering Voyager probes might only have a few years left to explore interstellar space, and that's assuming a planned, risky maneuver in 2026 goes well. NASA's twin Voyager 1 and Voyager 2 spacecraft, both running on nuclear power, now have access to just a portion of the 470 watts of energy that they generated immediately after their 1977 launches. …