NASA astronauts Sunita "Suni" Williams and Barry "Butch" Wilmore have been on the International Space Station since June, even though they initially expected to stay for just eight days. But now, NASA might bring the two astronauts home several weeks earlier than expected.

NASA on Tuesday swapped out the astronaut capsule it plans to use for an upcoming routine flight to the International Space Station, a scheduling move that will allow a slightly earlier return for two Starliner astronauts who have been on the station far longer than expected.

Butch Wilmore and Suni Williams, who is from Needham, could be coming home in mid-March because NASA will switch capsules for upcoming flights.