The Crew-10 mission will send four astronauts to the space station to take over for Butch Wilmore and Suni Williams’ crew, finally allowing their return home.

Astronauts Sunita Williams, who grew up in Needham, and Butch Wilmore have been living on the space station since June after the Boeing Starliner capsule they arrived on experienced issues while docking.

SpaceX scrubbed the launch of a relief crew on Wednesday night, delaying the handoff for NASA astronauts who have been awaiting a return trip to Earth.