Four astronauts had to cut their mission on board the International Space Station short after a “ medical concern ” forced NASA to return them to Earth weeks early.

Indian-origin astronaut Sunita Williams has retired from NASA after 27 years of service, closing a career that spanned three space missions, record-setting spacewalks, and some of the most complex cha...

But her latest mission, in which she and fellow NASA astronaut Butch Wilmore set out to test fly Boeing’s new Starliner capsule on its first crewed mission, was perhaps her most well-known.