Suni Williams and Butch Wilmore were only supposed to be in space for about a week when they launched in June, but problems with their Boeing Starliner spacecraft extended their journey for months.

The crew-swap mission will enable NASA’s Butch Wilmore and Suni Williams to return to Earth from the International Space Station.

NASA’s Crew-10 mission will bring back Butch Wilmore and Sunita Williams after nine months on the ISS. Their extended stay underscores space travel’s effects on muscle, bone, and radiation exposure, key concerns for astronaut health.