NASA Artemis Program 2026: Complete Guide to America’s Moon Mission

Buzz Aldrin on the lunar surface during Apollo 11, July 1969. More than half a century later, the Artemis program is returning humans to the Moon. Credit: NASA

Why Are We Going Back to the Moon?

The last time a human being set foot on the Moon was December 1972, when Apollo 17 astronauts Gene Cernan and Harrison Schmitt spent three days exploring the Taurus-Littrow valley. Since then, no one has ventured beyond low Earth orbit. The Artemis program is NASA’s plan to change that — not with a short visit, but with a sustained presence that lays the groundwork for eventually sending crews to Mars.

If you have been casually following the space news and feel a little lost about where things stand, this is your catch-up guide. Here is what the Artemis program is, what has already happened, and what comes next.

Artemis I: The Uncrewed Proving Flight

Artemis I launched on November 16, 2022, sending the uncrewed Orion spacecraft on a 25-day journey around the Moon and back. It was the first flight of NASA’s Space Launch System (SLS), the most powerful rocket ever to reach orbit, generating 8.8 million pounds of thrust at liftoff — about 15 percent more than the Saturn V that powered Apollo.

The mission tested everything: the SLS rocket, the Orion capsule, the European-built service module, the heat shield’s ability to survive a 5,000-degree-Fahrenheit reentry from lunar return speed, and the recovery operations in the Pacific Ocean. By every measure, it worked. Orion traveled farther from Earth than any spacecraft designed for humans — about 268,500 miles — before returning safely.

The success of Artemis I cleared the way for the crewed missions that follow.

Artemis II: The First Crew Beyond Earth Orbit Since 1972

Artemis II is the next major milestone. Four astronauts — Reid Wiseman, Victor Glover, Christina Koch, and Jeremy Hansen (a Canadian Space Agency astronaut) — will fly aboard Orion on a roughly 10-day mission around the Moon. They will not land on the surface. Instead, they will perform a free-return trajectory that swings around the far side of the Moon, testing the life support systems, navigation, and communication capabilities with a human crew aboard for the first time.

This is the most critical shakedown flight in the program. Artemis I proved the hardware works without people. Artemis II proves it works with people inside, operating the systems in real time. Victor Glover will become the first Black astronaut to fly beyond low Earth orbit, and Christina Koch will be the first woman on a lunar-distance mission — milestones that underscore how much the astronaut corps has evolved since the Apollo era.

The famous “Blue Marble” photograph, taken by the Apollo 17 crew in December 1972 — the last time humans traveled to the Moon. Artemis aims to end that long hiatus. Credit: NASA

Artemis III: Boots on the Lunar Surface

Artemis III is the one everyone is waiting for. This is the mission that will put astronauts on the Moon’s surface for the first time since Apollo 17. The landing site will be near the lunar south pole — a region Apollo never visited and one of the most scientifically interesting places on the Moon.

Why the south pole? Because permanently shadowed craters near the poles contain deposits of water ice. Water is not just valuable for drinking. It can be split into hydrogen and oxygen — rocket propellant. If lunar water can be extracted and used, it fundamentally changes the economics of deep space exploration. The Moon becomes a gas station, not just a destination.

The lander for Artemis III will be a modified version of SpaceX’s Starship, designated the Human Landing System (HLS). This is a departure from Apollo-era architecture, where NASA built the lander in-house. Under the current model, SpaceX develops and operates the vehicle while NASA supplies the crew and Orion capsule. Starship HLS will pre-position itself in lunar orbit before the crew arrives, then carry two astronauts down to the surface for approximately a week of exploration before returning them to Orion for the trip home.

The Lunar Gateway: A Space Station Around the Moon

Running in parallel with the landing missions is the Lunar Gateway, a small space station that will orbit the Moon. Think of it as a much smaller, Moon-orbiting version of the International Space Station. Gateway will serve as a staging point for lunar surface missions, a platform for science experiments, and a testbed for the deep-space habitation technology needed for Mars.

Gateway is an international effort. NASA is building the habitation module (HALO) and power/propulsion element (PPE), while the European Space Agency, the Japan Aerospace Exploration Agency, and the Canadian Space Agency are contributing modules and robotic systems. This multinational approach mirrors what made the ISS so successful — shared costs, shared expertise, and shared commitment.

What Does This Mean for Astronomy?

Artemis is not purely an exploration program. It has real scientific potential for astronomy. The lunar far side is permanently shielded from Earth’s radio noise, making it one of the quietest places in the solar system for radio telescopes. NASA and international partners have proposed deploying a low-frequency radio telescope on the far side that could detect signals from the cosmic dark ages — the period before the first stars formed — which no existing Earth-based or space-based instrument can observe.

The south pole itself holds geological records of billions of years of solar system history locked in its permanently shadowed craters. Understanding the composition and distribution of lunar volatiles (water, carbon dioxide, ammonia) will tell us about the delivery of water to the inner solar system — a question directly connected to how Earth got its oceans.

The Milky Way over the ALMA telescope array in Chile. Both ground-based observatories and future lunar telescopes will push the boundaries of what we can detect. Credit: ESO/B. Tafreshi (twanight.org), CC BY 4.0

How to Follow Along

One of the best things about Artemis compared to Apollo is that you can follow every step in real time. NASA streams launches, mission events, and press conferences live. Here are the best ways to stay current:

• NASA’s Artemis blog: blogs.nasa.gov/artemis — Mission updates and milestones.
• NASA TV: nasa.gov/nasatv — Live coverage of launches and major events.
• NASA’s official social media channels: Real-time updates on X, Instagram, YouTube, and Facebook.
• Spaceflight Now and SpaceNews: Independent outlets with detailed coverage of schedule changes, hardware milestones, and policy developments.

We are living through the early chapters of what may become the most consequential space program since Apollo. Decades from now, people will look back at Artemis and remember these years as the time humanity decided that the Moon was not just a place to visit — it was a place to stay.