A SpaceX capsule delivered four astronauts to the International Space Station (ISS) early on Sunday in a Nasa crew-swap mission.This mission will allow stranded astronauts, Butch Wilmore and Suni Williams, to return home after nine months on the ISS.The Crew-10 astronauts' SpaceX Crew Dragon capsule docked to the ISS after a 29-hour journey.The crew rotation flight, including Wilmore and Williams, is scheduled to depart the ISS on Wednesday.