A SpaceX capsule delivered four astronauts to the International Space Station early Sunday in a NASA crew-swap mission that will allow a pair of stuck astronauts to return home after nine months on the orbiting lab.

Sunita Williams return LIVE Updates: Crew-10 will soon enter the ISS and join the Expedition 72 crew of NASA astronauts Nick Hague, Don Petitt, Suni Williams, and Butch Wilmore, as well as Roscosmos cosmonauts Aleksandr Gorbunov, Alexey Ovchinin, and Ivan Vagner.

After nine months stranded on the ISS, astronauts Butch Wilmore and Suni Williams are closer to returning home as a replacement crew docked with the station. They were aboard the ISS for an extended mission due to propulsion issues with their Boeing Starliner spacecraft.