The four astronauts selected for the Crew-11 mission, a joint venture between NASA and SpaceX, are due to travel to the International Space Station.

NASA and SpaceX have delayed Thursday’s planned launch of the Crew-11 mission to the International Space Station (ISS). The mission will mark the next exciting chapter in their partnership to support long-duration human spaceflight and cutting-edge research in low-Earth orbit.

The astronauts of the SpaceX Crew-11 will launch to the International Space Station on Thursday, July 31, from NASA’s Kennedy Space Center. Crew-11 is scheduled to launch no earlier than July 31 at 12:09 p.m. aboard the Crew Dragon Endeavour spacecraft. There will be a backup opportunity for liftoff on Aug. 1 at 11:43 a.m.