NASA moved a 322-foot-tall rocket out to the launchpad on Saturday, a key step as the agency prepares for a long-awaited mission to send four astronauts around the moon.

NASA began rolling out a costly rocket to the launchpad at the Kennedy Space Center in Florida on Saturday, a milestone in a lunar space race between the US and China.

The four astronauts on the Artemis 2 mission won't land on the moon, but during their 10-day journey beyond the moon and back, they'll get farther from Earth than any humans have ever been.