Home / Companies / Aerojet Rocketdyne / SLS Block 1 Hardware SLS Block 1 Boeing · Boeing / Northrop / Aerojet / NASA SLS Block 1 launch stack for Artemis II crewed flight. CompaniesAerojet RocketdyneOEM FlightsArtemis II2026-04-01 · First crewed Artemis flight: SLS + Orion lunar flyby. Cargo Space Launch System Block 1 stack Sourcesnasa.govnasa.gov