Engineers needed to swap out the clogged thrusters on the spacecraft as it continues its journey through interstellar space.

The spacecraft uses its thrusters to stay pointed at Earth, but after 47 years in space some of the fuel tubes have become clogged. Engineers working on NASA’s Voyager 1 probe have successfully mitigated an issue with the spacecraft’s thrusters,

Voyager 1 spent the last 47 years hurtling in a straight line away from Earth, exploring the deepest reaches of space that humanity has ever ventured. However, NASA must carefully manage Voyager 1 as the probe ages and slowly breaks down 15 billion miles away from the closest person.