Why Are We Going Back to the Moon?
More than five decades after Apollo 17 astronauts last walked on the lunar surface, NASA's Artemis program is charting a bold course to return humans to the Moon — and this time, to stay. Unlike the Apollo missions, which were driven largely by Cold War competition, Artemis is focused on long-term scientific discovery, international partnership, and laying the groundwork for future crewed missions to Mars.
What Is the Artemis Program?
Artemis is NASA's flagship human spaceflight program. Its overarching goals are to:
- Land the first woman and the first person of color on the Moon
- Establish a sustainable human presence at the lunar South Pole
- Develop technologies and operational experience needed for eventual Mars missions
- Conduct cutting-edge science on the lunar surface and in orbit
The program is built around several major hardware elements, including the Space Launch System (SLS) rocket, the Orion crew capsule, and the Gateway lunar space station.
Key Hardware: SLS, Orion, and Gateway
Space Launch System (SLS)
The SLS is NASA's heavy-lift rocket designed to send astronauts beyond low Earth orbit. It is one of the most powerful rockets ever built, capable of producing over 8.8 million pounds of thrust at launch. It forms the backbone of every Artemis crewed mission.
Orion Capsule
Orion is the crew vehicle that will carry astronauts to and from the Moon. Designed for deep-space travel, it features advanced life support systems, a modern avionics suite, and a robust heat shield capable of withstanding reentry speeds from lunar distance — far faster than typical Earth-orbit returns.
Gateway Lunar Space Station
Gateway is a small but critical space station that will orbit the Moon, serving as a staging point for lunar surface missions. Built in collaboration with international partners including ESA, JAXA, and CSA, Gateway will enable longer, more complex lunar surface operations than Apollo ever could.
The Artemis Mission Phases
- Artemis I: An uncrewed test flight of the SLS and Orion that successfully completed a lunar flyby in late 2022, proving the system was ready for humans.
- Artemis II: The first crewed flight of SLS and Orion, intended to loop around the Moon without landing — a proving flight for the full crew system.
- Artemis III: The first crewed lunar landing of the program, targeting the lunar South Pole — a region of intense scientific interest due to confirmed water ice deposits.
- Artemis IV and beyond: Assembly of Gateway and progressively longer surface stays, building toward a permanent human presence.
Why the Lunar South Pole?
The South Pole is scientifically compelling for several reasons. Permanently shadowed craters in the region contain water ice, which could be extracted and converted into drinking water, breathable oxygen, and even rocket propellant — a resource that could dramatically reduce the cost of deep-space missions. The area also receives near-continuous sunlight on certain elevated peaks, making solar power generation far more practical than anywhere else on the Moon.
International and Commercial Partnerships
Artemis is a genuinely collaborative endeavor. Dozens of countries have signed the Artemis Accords, a set of principles governing peaceful and transparent space exploration. Commercial partners like SpaceX (providing the Human Landing System for early missions) and a growing ecosystem of lunar logistics companies are also central to the program's sustainability strategy.
The Bigger Picture: A Stepping Stone to Mars
Every lesson learned on the Moon — from living off the land using in-situ resources, to operating spacecraft in deep space, to managing the psychological challenges of long-duration missions — feeds directly into NASA's long-term vision of sending humans to Mars. The Moon is both a destination in its own right and humanity's proving ground for interplanetary travel.
Artemis represents more than a return to a familiar world. It is the opening chapter of a permanent human expansion into the solar system.