NASA launched its Artemis II mission on April 1, 2026, sending four astronauts aboard the Orion spacecraft on a trajectory around the Moon, marking the first crewed lunar mission since Apollo 17 in December 1972. The Space Launch System rocket lifted off from Kennedy Space Center at Cape Canaveral, Florida, in what agency officials called a generational milestone for human space exploration.

The crew consists of three NASA astronauts and one Canadian Space Agency astronaut, reflecting an international partnership at the heart of the Artemis program. The mission is designed as a crewed flight test of the Orion spacecraft and SLS rocket system, looping around the Moon without landing before returning to Earth. A successful mission is considered a prerequisite for future crewed lunar landings planned under Artemis III.

The launch came after years of delays, cost overruns, and technical hurdles that pushed the original timeline back by several years. NASA and its contractors completed final preparations in the days leading up to liftoff, clearing the vehicle for flight following a series of reviews. The agency has positioned Artemis as the foundation of a long-term human presence at and around the Moon, with the lunar Gateway space station and eventual surface habitation among its longer-range goals.

The mission carries significant symbolic weight as the United States seeks to reassert leadership in deep space exploration amid growing competition from China's lunar program. International partners including the European Space Agency, the Japan Aerospace Exploration Agency, and the Canadian Space Agency all have roles in the broader Artemis architecture. NASA has described the mission as a step toward eventually sending humans to Mars.