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

Two Boeing Starliner astronauts, stranded at the International Space Station in June after what was supposed to be a weeklong test flight, are facing a new delay in their return trip to Earth, NASA revealed Tuesday.