Astronauts Barry “Butch” Wilmore and Sunita Williams are set to return to Earth after nearly 300 days in space, far exceeding their original 8-day mission plan.

NASA and SpaceX delayed the return of astronauts Sunita Williams and Barry Wilmore from the International Space Station due to a hydraulic system issue with the Falcon 9 rocket’s ground support equipment.

Sunita Williams and Butch Wilmore have completed over 900 hours of research involving 150 scientific experiments and technology demonstrations during their extended stay on the orbiting laboratory.