The space agency is looking to maintain human presence in the microgravity environment as it transitions to commercial stations.

NASA astronauts Sunita "Suni" Williams and Barry "Butch" Wilmore have reached their six-month milestone of being stranded on the International Space Station, despite initially planning to stay for just eight days.

The two NASA astronauts "not stranded" on the International Space Station (ISS) are "not stranded" for another month. Due to a delay in the next crew rotation mission, Butch Wilmore and Suni Williams will remain on the station until late March.

The crew launched to the ISS in June for a week-long mission but will end up spending an unplanned nine months in space.

The return of NASA astronauts Sunita Williams and Barry Wilmore from the International Space Station has been delayed again, extending their mission to over nine months. Doctors express concerns about the impact of prolonged stays in space on their health.