Home / Companies / NASA / SLS Core Stage (Block 1) Hardware SLS Core Stage (Block 1) Boeing / NASA SLS Block 1 core stage - heavy-lift national launch for Artemis I. CompaniesNASAOEMBoeingNorthrop GrummanAerojet Rocketdyne FlightsArtemis I2022-11-16 · First integrated Artemis flight test: uncrewed SLS Block 1 + Orion.Artemis II2026-04-01 · First crewed Artemis flight: SLS + Orion lunar flyby. Cargo SLS Core Stage (Block 1)SLS Five-Segment Solid Rocket BoostersSpace Launch System Block 1 stackSLS Block 1 + Orion national launch/crew stackSpace Launch System Block 1B + Exploration Upper StageSpace Launch System Block 1B + Exploration Upper Stage Sourcesnasa.gov