A decision to bring Wilmore and Williams home early aboard the Crew 9 ship ahead of Crew 10’s arrival would have left NASA astronaut Don Pettit, who flew to the ISS with a Russian crew last September, ...

If Suni Williams and Butch Wilmore depart on schedule, they will have have spent more nearly 10 months in space, but it's not unheard of.

Here's how astronauts Butch Wilmore and Suni Williams physically managed to last 10 month at the International Space Station.