SpaceX launched the rescue mission on Saturday with two seats reserved for Butch Wilmore and Suni Williams, who will return to Earth in 2025.

NASA and SpaceX will launch a two-person crew on a Dragon that will be the ride home for the Starliner astronauts stuck in space.

Because NASA rotates space station crews approximately every six months, this newly launched flight with two empty seats reserved for Wilmore and Williams won’t return until late February. Officials said there wasn’t a way to bring them back earlier on SpaceX without interrupting other scheduled missions.