NASA's Artemis II represents humanity's first crewed venture beyond low Earth orbit in over five decades. The mission carries four astronauts—commander Reid Wiseman, pilot Victor Glover, mission specialist Christina Koch, and Canadian Space Agency astronaut Jeremy Hansen—on a 10-day lunar flyby trajectory. Rather than landing on the Moon, the crew will execute a free-return trajectory that takes them around the lunar surface, validating critical life support systems and procedures for deep space operations while paving the way for future Artemis missions targeting lunar landing.

The Space Launch System Block 1 rocket, NASA's most powerful operational launch vehicle, lifted off from Launch Complex 39B at Kennedy Space Center in Florida on April 9, 2026. The mission launched the newly developed Orion spacecraft, designed specifically to support crewed deep space exploration with enhanced environmental control and radiation protection systems essential for missions beyond Earth's protective magnetosphere.

The mission concluded successfully, achieving all primary objectives. Artemis II marked a historic milestone as the first crewed Artemis flight and the first SLS crewed launch, demonstrating NASA's capability to return humans to cislunar space. The successful validation of Orion's life support systems during the extended deep space mission established the technical foundation for Artemis III, which aims to land astronauts on the lunar surface.