Human Landing System

The Human Landing System (HLS) are spacecraft developed for the NASA-led Artemis program to land astronauts on the Moon. HLS vehicles are designed to transport crews from lunar orbit to the lunar surface, support them during surface operations, and return them to lunar orbit. Two HLS designs are currently in development: SpaceX's Starship HLS and Blue Origin's Blue Moon Mark 2. As of March 2026, NASA intends to launch one or both into Earth orbit in mid-2027 for rendezvous and docking tests as part of the Artemis III mission. Selection of the lander for the first crewed lunar landing of the program during the Artemis IV mission in early 2028 will depend on the results of those tests and equipment readiness. Rather than leading development internally, NASA provided a reference design and solicited proposals from commercial vendors to design, develop, and deliver systems meeting agency requirements. The competition began in 2019, and Starship HLS was selected in 2021. Following the award, the procurement was challenged in court, alleging improper evaluation of proposals. In 2023, NASA expanded the program by selecting a second competing lander, Blue Moon, stating that the move would increase competition and support additional lunar landing opportunities.