NASA astronauts are returning to Earth after nine months in space. Experts have said a prolonged period in space can come with changes to human physiology and psychology.

Astronauts Butch Wilmore and Sunita Williams returned to Earth after being stranded in space for nine months. The two departed the International Space Station early on Tuesday morning, using a SpaceX capsule that had docked on Sunday.

Starliner astronauts Suni Williams and Butch Wilmore, who were stranded at the International Space Station for nine months, are back on Earth after splashing down Tuesday off the coast of Florida.