NASA's Artemis 1 moon rocket headed back to the launch pad Tuesday night (Aug. 19) to take a step closer to a landmark lunar mission.
Artemis 1 is an uncrewed test flight of the huge Space Launch System (SLS) megarocket and its Orion spacecraft, and it began the rollout to a Kennedy Space Center launch pad at about 10 p.m. EDT (0200 GMT Wednesday, Aug. 17). By 7:30 a.m. EDT, it had reached its destination.
The Orion, stacked atop the rocket, began moving from the KSC's Vehicle Assembly Building for a journey that took more than 10 hours. The crawler carrying the Artemis 1 hardware had to make a journey to Launch Pad 39B at roughly 1 to 2 miles an hour (1.6 to 3.2 km/h).
NASA elected to bring the rocket out a full two days earlier than planned. The agency said on its Artemis blog that the team finished flight termination system testing, the last major activity required until the rocket was closed out and the final access platforms at the VAB were retracted.
NASA has not released a detailed schedule of the rollout, which is expected to last between 8 and 11 hours depending on weather conditions, road conditions and other technical matters.
Blastoff of the uncrewed mission is scheduled for no earlier than Aug. 29, and will bring the Orion spacecraft around the moon on a test of the vehicle's system for future human missions. In between will be several webcasts of the science and other tech on board the mission.