The huge Artemis 1 stack —
a Space Launch System rocket with an Orion crew capsule on top is scheduled to roll off Pad 39B at NASA's Kennedy Space Center in Florida today at about 5:30 p.m. EDT
Artemis 1 rolled out to Pad 39B
from KSC's Vehicle Assembly Building (VAB) on March 17 to prepare for its "wet dress rehearsal," a crucial series of tests designed to get the mission ready for liftoff.
That procedure, which
culminates in the fueling of the SLS and the performance of several simulated launch countdowns, began on April 1 and was supposed to end on April 3.
But Artemis 1 encountered several
problems — namely, a faulty valve in the mission's mobile launch tower and a hydrogen leak in one of the lines connecting the tower to the rocket.
Mission team members ultimately
decided to roll Artemis 1 back to the VAB to address these issues. After those fixes are made, the stack will head back out to Pad 39B and finish the wet dress rehearsal
The rollback, performed by
NASA's huge crawler-transporter 2 vehicle, will begin today but almost certainly extend into tomorrow