The Voyager 1 and 2 probes have been on a remarkable journey. Since their launch in 1977, they have traveled through the solar system, past several of the outer planets, and headed out beyond the borders of the solar system and into interstellar space. They are the most distant man-made objects in the universe, and they are still going — even 47 years after they first left Earth. Keeping the old technology running for this long hasn’t been easy, though. Various instruments have had to be turned off in order…
