NASA will launch the Space Launch System on the Artemis 3 mission without an upper stage, marking a significant departure from the original architecture for the lunar program. The agency disclosed the change as it refines mission plans following technical and budgetary constraints that have reshaped the timeline for returning humans to the Moon.
The decision eliminates the Exploration Upper Stage, originally designed to propel the Orion spacecraft and its crew toward lunar orbit. Instead, NASA will rely on the Interim Cryogenic Propulsion Stage, a more mature system that leverages existing rocket technology. This modification reduces development costs and accelerates the launch readiness of Artemis 3 while maintaining the capacity to deliver astronauts to lunar orbit.
The shift reflects NASA's ongoing recalibration of the Artemis program. The agency faced mounting costs and schedule delays with the more ambitious upper stage architecture. The revised approach prioritizes getting boots on the lunar surface over perfecting a brand-new propulsion system. Orion will still deliver four astronauts, with two descending to the Moon's south polar region, the mission's primary objective.
The Artemis 3 mission timeline now targets the mid-2020s, though NASA has not announced a specific launch date. The program previously targeted a 2025 landing before budget realities forced a reassessment. The Moon landing will use commercial lunar landers, part of NASA's broader strategy to leverage private industry for lunar logistics.
This upper stage decision opens pathways for more rapid iteration in the Artemis cadence. Subsequent missions can incorporate the Exploration Upper Stage once development matures, enabling more ambitious cargo deliveries and longer-duration lunar operations. The pragmatic shift acknowledges that reaching the Moon with proven technology outweighs waiting for next-generation systems.
The SLS remains the world's most powerful operational rocket. Artem