The process began at 7 a.m. The 11-million-pound Artemis II SLS rocket and Orion Spacecraft have to move just four miles, but according to NASA, the process could take up to 12 hours, because it can only move at a 1 mph pace.

Four astronauts with SpaceX Crew-11 are set to undock from the International Space Station to make their return to Earth. This planned departure comes after NASA announced that it postponed a spacewalk due to a crew member's medical situation.