Butch Wilmore and Sunita Williams will finally return to Earth after nine months 'stuck' in space. The NASA astronauts are awaiting rescue by SpaceX.

Two astronauts are one step closer to returning to Earth. A SpaceX Dragon carrying a crew of four will dock at the International Space Station later tonight. The crew will replace Butch Wilmore and Suni Williams, who have been in space for more than nine months.

SpaceX surprised astronauts Butch Wilmore and Suni Williams, who have been on the International Space Station since last June, during their recent rescue mission.