the ICPS and the Orion Stage Adapter. The ICPS is a modified United Launch Alliance (ULA) Delta Cryogenic Second Stage that serves as the “in-space” stage for the SLS Block 1 vehicle.
NASA received the upper stage for the agency's Artemis II SLS (Space Launch System) rocket on Mar. 4 supplied by Boeing and ...
It is distinguished by two stages, two side-mounted solid-fuel boosters, a dual-engine Centaur upper stage and a Launch Vehicle Adapter with aeroskirt to cradle Starliner during ascent," a ULA ...