The gigantic Space Launch System (SLS) Moon rocket and Orion Space Capsule was moved from Nasa’s Kennedy Space Center in Florida to a launch pad around four miles (6.4km) away.
The rocket was carefully transported at a top speed of 0.82 mph (1.3 km/h), with the journey taking almost 12 hours on Saturday.
Part of the Artemis II mission, the rocket is not set to launch into space until 6 February at the earliest. The 10-day mission could take its four astronauts further into space than anyone has been before.
It aims to set the stage for an eventual human landing on the surface of the Moon for the first time since 1972.
