National Aeronautics and Space Administration (NASA) has said it’s “too risky” to bring the two astronauts, Butch Wilmore and Sunita Williams, back to earth currently, because of which Boeing’s Starliner capsule will return without the two astronauts.

Wilmore and Williams will continue their work formally as part of the expedition and will return only in February 25. This means what would have been a week-long test flight will now extend to around 8 months. The uncrewed return of the capsule will allow NASA and Boeing to continue gathering test data on the Starliner during its flight home.