> The Voyagers are powered by heat from decaying plutonium, which is converted into electricity. Each year, the aging spacecraft lose about 4 watts of power. F

> The Voyagers are powered by heat from decaying plutonium, which is converted into electricity. Each year, the aging spacecraft lose about 4 watts of power. From the article. This is not really correct. The plutonium doesn't decay that fast. Its half life is about 87 years. So it's still way above half. I Unfortunately the thermoelectric converters that are losing efficiency too. Otherwise there'd still be enough power for a long time. Still pretty awesome they lasted so long of course.