SLS Exploration Upper Stage Test Article Offloaded in Area 94

These images show technicians at NASA’s Michoud Assembly Facility in New Orleans removing a weld-confidence article from a robotic welding tool in December 2023. This article features pieces of a liquid hydrogen tank dome that were welded as a test to make sure the dome used for flight will be welded correctly. The dome will be part of the new, four-engine EUS (exploration upper stage) for NASA’s SLS (Space Launch System) rocket. EUS will be used for the Artemis IV lunar mission, replacing the single-engine interim cryogenic propulsion stage (ICPS) used for the first three Artemis missions. The evolved in-space stage will use a combination of liquid oxygen and liquid hydrogen propellants to help power the engines to send large cargo and crew inside NASA’s Orion spacecraft to the Moon. The weld-confidence article pictured here will not be used for flight but is instead helping teams prepare and certify the procedures needed to manufacture flight hardware. NASA is working to land the first woman and person of color on the Moon under Artemis. SLS is part of NASA’s backbone for deep space exploration, along with the Orion spacecraft, advanced spacesuits and rovers, the Gateway in orbit around the Moon, and commercial human landing systems. SLS is the only rocket that can send Orion, astronauts, and supplies to the Moon in a single launch.