The crew-swap mission will enable NASA’s Butch Wilmore and Suni Williams to return home from the International Space Station.

The replacements for NASA’s two stuck astronauts launched to the International Space Station on Friday night, paving the way for the pair’s return after nine long months. Butch Wilmore and Suni Williams need SpaceX to get this relief team to the space station before they can check out.

The Crew-10 mission will allow NASA astronauts Barry Wilmore and Sunita Williams to return to Earth after spending nine months aboard the International Space Station, far longer than their planned weeklong stay.