The Voyager 1 spacecraft is functioning normally again after the aging probe’s dwindling power supply triggered a communications blackout. It’s one of several challenges faced by the spacecraft this year.

The spacecraft—humanity's most distant probe—managed to resumed contact by switching to a secondary radio not used since 1981.

The spacecraft, launched in 1977, is 15 billion miles away from Earth. It stopped sending data but NASA managed to get it restarted.

Voyager 1, the human-engineered machine farthest from Earth, has been exploring the cosmos for nearly 50 years. For a month, NASA had no contact with the probe. Fortunately, despite the issues, communication has been restored.