The spacecraft that will bring home two stranded astronauts from the International Space Station (ISS) has been launched.
On board are the new crew of four astronauts, who must take their place on the ISS before the two Americans, Butch Wilmore and Suni Williams, can finally return home after more than nine months in orbit.
Wilmore and Williams went up to the ISS in June and were initially supposed to spend only about a week there. But Boeing's rocket system, which they traveled with, got such serious safety problems that it now has a flying ban for an indefinite period.
The SpaceX spacecraft that is now on its way is expected to arrive at the ISS on Sunday night Swedish time. If everything goes as planned, Wilmore and Williams will be able to return home next week.
