NASA’s Voyager 1 is back on the airwaves after going silent in deep space for days. The 47-year-old spacecraft, traveling billions of miles beyond Earth, has faced technical mishaps and is now operating on a 1981-era transmitter, all while pushing the boundaries of what’s possible in space exploration. Its latest hurdle shows just how fragile and amazing this interstellar mission truly is — and why the team at NASA keeps pulling miracles to keep it going.

Aging spacecraft starts up a radio transmitter it hasn’t used since 1981 from 15 billion miles away