Teams with NASA’s Exploration Ground Systems Program integrate the interim cryogenic propulsion stage to the SLS (Space Launch System) launch vehicle stage adapter on Thursday, May 1, 2025, inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida. The four-story propulsion system, built by Boeing and ULA (United Launch Alliance), is powered by an RL10 engine that will enable the Orion spacecraft to build up enough speed for the push toward the Moon during the Artemis II crewed test flight.

Image Credit: NASA