There have been two NASA astronauts stranded in space on extended missions before. - An Overview
Boeing insisted just after considerable tests that Starliner was safe to deliver the two house, but Nasa disagreed and booked a flight with SpaceX as a substitute. they are going to return in late September, their plan 6-month stay extended a month by the Starliner dilemma. NASA claimed It might be unsafe to squeeze two much more into your capsul