The four astronauts of SpaceX's Crew-4 mission to the International Space Station (ISS) will have to cool their heels here on Earth for at least one extra day
The launch of Crew-4 had been scheduled for April 19
But it'll now lift off no earlier than April 20, and NASA and SpaceX are also considering the backup date of April 23 as an option
The additional spacing provides mission teams time to complete final prelaunch processing for Crew-4 following the launch of the Axiom Mission 1 to the space station
There are significant differences between the two flights, however. SpaceX is flying Crew-4 for NASA, and the crewmembers are all government astronauts
Crew-4 will also be a much longer mission than Ax-1, spending months at the orbiting lab