Artemis

Artemis is NASA’s campaign for human lunar exploration with international and commercial partners. The name covers connected missions and capabilities. A launch vehicle, a crew capsule, a lunar lander, and surface equipment each perform different jobs. Their interfaces are as important as their individual performance.^[1]

Artemis should be evaluated as an evolving exploration architecture. Crew transport, launch, landing, surface operations, and supporting services have distinct requirements and dependencies. A programme-level description does not fix the configuration of every mission. Use dated mission documentation for specific hardware assignments, milestones, and readiness claims.^[1]

Orion carries astronauts through deep space and returns them to Earth. Its service module supplies essential support during flight. Orion is not itself a vehicle for landing on the Moon: getting from lunar space to the surface requires a separate capability.^[2]

Orion combines a crew module, a service module, and a launch abort system. The service module provides propulsion, electrical power, thermal control, and consumables. The crew module must support atmospheric entry and recovery after the mission. The spacecraft’s role is distinct from the descent and ascent functions of a lunar lander.^[2]

The Space Launch System supplies the launch capability used for the initial Artemis missions. Rocket stages do different parts of the work as the vehicle climbs and accelerates. Propulsion must provide the right trajectory, not merely enough height to reach “space.”^[3]

SLS combines solid rocket boosters with a liquid-propellant core and an upper-stage capability. Payload performance depends on the target orbit or departure trajectory, not just a headline mass-to-orbit figure. Staging, structural loads, guidance, and mission energy requirements all shape the delivered capability.^[3]

A sustained exploration effort must learn how to transport people, keep them healthy, work on the surface, and return them safely. Experience from the International Space Station helps, but lunar missions have different distances, environments, and rescue options. Each capability needs evidence from its own tests and missions.^[1][2]

Lunar operations change communication geometry, radiation exposure, logistics, and abort opportunities relative to low Earth orbit. Systems engineering must account for failures across independently developed elements. Programme schedules can change; architectural purpose and demonstrated mission outcomes should be distinguished from planned future flights.^[1][2]