Year: 2022

This timeline covers major countdown activities planned during the NASA’s wet dress rehearsal for the Artemis 1 mission. The wet dress rehearsal will include loading of more than 700,000 gallons of cryogenic liquid hydrogen and liquid oxygen into the Space Launch System moon rocket on launch pad 39B at the Kennedy Space Center in Florida.

NASA started loading liquid oxygen into the Space Launch System’s core stage Monday, but scrubbed a countdown dress rehearsal before pumping propellants into the rocket’s remaining propellant tanks. A previous fueling attempt was scrubbed Sunday due to a ground system issue at the Kennedy Space Center. The cryogenic tanking operation is part of a full-up countdown dress rehearsal ahead of the launch of unpiloted Artemis 1 moon mission.

NASA commenced a two-day countdown dress rehearsal for the agency’s huge Space Launch System moon rocket Friday, with clocks ticking down to a critical milestone Sunday, when the heavy-lifter will be fueled and pressurized on the launch pad for the first time.