NASA has confirmed that one of its greatest ever missions, Voyager 1 ... as the decaying plutonium in their on-board radioisotope thermoelectric generator begins to ebb — their lifespan will ...

NASA’s Voyager 1 spacecraft—currently cruising in interstellar space—got in touch on April 20 with usable data on its health and status. That’s a triumph after a glitch in November caused ...