NASA astronauts Butch Wilmore and Suni Williams set out for a weeklong mission at the International Space Station last year. After nine months, they are coming home.

The International Space Station (ISS) is almost the size of a football field. It serves as a laboratory and living space for astronauts, including Sunita Williams and Butch Wilmore, who spent 9 months aboard stranded.

The International Space Station (ISS) is a global collaboration involving multiple countries. It is the largest structure ever built in space by humans. Building and Ownership of the ISS The ISS’s main structure was built between 1998 and 2011,