U.S. astronauts Butch Wilmore and Suni Williams could be back on Earth as soon as Tuesday. The pair has been in space for nearly 300 days due to issues with the spacecraft they arrived in: Boeing's Starliner.

Reaching orbit from NASA’s Kennedy Space Center, the newest crew includes NASA’s Anne McClain and Nichole Ayers, both military pilots; and Japan’s Takuya Onishi and Russia’s Kirill Peskov, both former airline pilots. They will spend the next six months at the space station, considered the normal stint, after springing Wilmore and Williams free.