NASA and SpaceX on Friday launched a long-awaited crew to the International Space Station that opens the door to bringing home U.S. astronauts Butch Wilmore and Suni Williams, who have been stuck on the orbital lab for nine months.

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 are on their way to the International Space Station aboard the Crew Dragon, which launched from Kennedy Space Center.