Artemis III: What It Is, What Changed, and What Comes Next

For decades, going back to the Moon felt like something humanity always meant to do but never quite got around to. The Apollo program ended in 1972, and somehow more than fifty years passed without a single human footstep on the lunar surface. That's about to change — and the mission at the heart of it all is Artemis III.

But there's a catch. If you've been following the news, you may have heard that Artemis III was supposed to be the big one — the moment humans finally set foot on the Moon again. And then, in early 2026, NASA changed the plan.

Here's the full story of what Artemis III actually is today, why it matters, and where the program is really headed.

How We Got Here: The Story So Far

To understand Artemis III, you need to understand the mission that came right before it.

Artemis I (November 2022) was uncrewed. NASA launched its new Space Launch System — the most powerful rocket it has ever built — and sent an empty Orion spacecraft on a 25-day loop around the Moon and back. No humans aboard, just instruments, test dummies, and sensors collecting data. The goal was simple: prove the hardware works. It did.

Artemis II (April 2026) carried people. On April 1, 2026, four astronauts climbed aboard Orion atop the SLS rocket and launched from Kennedy Space Center in Florida. Over the course of nearly ten days, NASA astronauts Reid Wiseman, Victor Glover, and Christina Koch, along with Canadian Space Agency astronaut Jeremy Hansen, flew around the Moon — farther from Earth than any human had traveled since Apollo 17 in December 1972. They didn't land. They weren't supposed to. This was a systems test, a shakedown of everything from life support to navigation to heat shield performance. The crew splashed down safely on April 10, 2026. By every measure, the mission was a success.

Now, with Artemis II behind it, NASA is preparing for Artemis III.

The Original Plan — and Why It Changed

When NASA first designed the Artemis sequence, the plan was straightforward. Artemis I tests the rocket and capsule uncrewed. Artemis II tests them with a crew in a lunar flyby. Artemis III lands on the Moon.

That original version of Artemis III would have placed two astronauts — including the first woman and first person of color — on the lunar surface near the south pole, where they would have spent about a week exploring, collecting samples, and conducting science.

It sounded clean. It was not going to be clean.

The complications started piling up years ago. The commercial lunar landers — massive spacecraft developed by SpaceX and Blue Origin under contract with NASA to carry astronauts from lunar orbit down to the surface — faced delays in development and testing. Neither lander had ever flown a crewed mission. Neither had been tested in the unique conditions of deep space. Going straight from "never tested with astronauts" to "landing humans on the Moon" was an enormous leap of faith that NASA eventually decided it wasn't comfortable making.

In February 2026, NASA Administrator Jared Isaacman announced the change. "We're essentially going to pull in Artemis III to launch in 2027 with a revised mission profile," he said. Instead of heading straight to the Moon, Artemis III would serve as a critical intermediate test — proving out the landers in Earth orbit before any astronaut rides one to the lunar surface.

It was the right call. Slower, yes. Safer, absolutely.

What Artemis III Will Actually Do

Artemis III will no longer land astronauts on the Moon. Instead, it will serve as a test flight in low Earth orbit.

Here is what the mission will actually involve:

Launching the crew. The Artemis III crew will ride the Orion spacecraft atop the SLS rocket from Kennedy Space Center, just as the Artemis II crew did. The mission will test rendezvous and docking capabilities between Orion and commercial spacecraft needed to land astronauts on the Moon.

Meeting the landers in orbit. Once in orbit, the crew will rendezvous with one or both of the commercial lunar landers — SpaceX's Starship HLS and Blue Origin's Blue Moon. Astronauts will physically dock with these vehicles, board them, test their life support systems, check communications, run through mission procedures, and practice the exact steps they will need to execute flawlessly during Artemis IV's lunar landing.

Testing the new spacesuits. Astronauts will also test new spacesuits and check the life support systems while the spacecraft are connected in orbit. The suits being tested are the Axiom Extravehicular Mobility Unit — AxEMU — developed by Axiom Space in collaboration with Prada. These suits are designed to handle the extreme cold, radiation, and sharp lunar dust that future Moon-walkers will encounter.

Gathering data to make Artemis IV safer. Every hour of Artemis III in orbit generates data. How do the landers handle power distribution in space? How do astronauts move between capsules in zero gravity while wearing the new suits? How do communications hold up between Orion and a docked lander? Testing these steps in LEO is designed to make the actual lunar landing safer.

Artemis III is currently scheduled to launch in late 2027. NASA continues preparing the hardware and teams to launch and fly the Artemis III mission in 2027 ahead of subsequent missions to the Moon's surface beginning in 2028.

The Hardware Being Built Right Now

It's worth pausing to appreciate the scale of what's being assembled.

The SLS core stage for Artemis III — the massive central structure of the rocket containing liquid hydrogen and liquid oxygen tanks — was completed at NASA's Michoud Assembly Facility in New Orleans and rolled out on April 20, 2026. It traveled 900 miles down the Gulf Coast aboard NASA's Pegasus barge, arriving at Kennedy Space Center in Florida on April 27, 2026. Technicians maneuvered NASA's massive core stage of the SLS rocket inside the agency's Vehicle Assembly Building on April 28 in preparation for Artemis III.

The four RS-25 engines that will power the rocket are scheduled to ship from NASA's Stennis Space Center in Mississippi by July 2026. Once integrated, the SLS for Artemis III will stand over 320 feet tall and produce more than 8.8 million pounds of thrust at liftoff — enough force to physically feel from miles away.

Meanwhile, inside Kennedy Space Center's processing facilities, engineers are completing functional testing of the Artemis III Orion crew module. All 186 Avcoat blocks for its upgraded heat shield have been installed, cured, and inspected. Teams also completed thermal cycle testing and ultrasonic inspections of the heat shield — improvements made after analysis of how the Artemis II heat shield performed during re-entry.

The Two Landers: SpaceX and Blue Origin

One of the most unusual aspects of the Artemis program is that NASA chose to fund two competing commercial lunar landers rather than building one itself. Both will be tested during Artemis III and both are being developed as options for the actual Moon landing in Artemis IV.

SpaceX Starship HLS is a lunar variant of the Starship vehicle — the same rocket SpaceX is developing for point-to-point travel on Earth and eventual Mars missions. It is enormous: over 160 feet tall. It launches separately, waits in orbit, and rendezvoused with Orion, from where astronauts transfer across and ride it down to the surface. Starship has completed multiple test flights, though it remains unproven in crewed missions or lunar orbit operations.

Blue Origin Blue Moon Mark 2 is the lander developed by Jeff Bezos's space company. Blue Origin's lander, launching uncrewed on top of the company's New Glenn rocket, will meet astronauts aboard NASA's Orion spacecraft in lunar orbit. Two astronauts will board the Blue Moon crew lander, which will ferry them to the surface and back to other crew members aboard Orion in lunar orbit following the conclusion of their surface stay.

NASA is currently training with full-scale mock-ups of both landers to prepare crews for what these vehicles look and feel like on the inside.

Where the Moon Landing Actually Happens: Artemis IV

The crewed Moon landing — the moment that will echo Apollo 11 across history — is now assigned to Artemis IV.

NASA continues to target early 2028 for the first Artemis lunar landing, a date that has remained unchanged since mid-2025. After reaching lunar orbit, the crew will transfer from Orion to a commercial lunar lander for their descent to the Moon's surface.

The destination is the Moon's south polar region — a place Apollo astronauts never visited. In the permanently shadowed craters near the south pole, temperatures plunge to nearly -250°C (-418°F), and those craters have never seen sunlight. Scientists believe those shadows have preserved something extraordinarily valuable: water ice, possibly deposited by ancient comets and asteroids over billions of years.

That water isn't just scientifically interesting. It's a potential fuel source. Split water into hydrogen and oxygen and you have rocket propellant. Compress and purify it and you have drinking water and breathable air. The Moon's south pole could become a refueling station for humanity's deeper push into the solar system — a base camp for the journey to Mars.

Why This Careful, Step-by-Step Approach Makes Sense

It's tempting to view the changes to Artemis III as a setback. A Moon landing pushed back, a mission rerouted to Earth orbit. But seen in a different light, this is NASA doing exactly what NASA should do.

The Apollo program moved extraordinarily fast because it had to — a geopolitical race with the Soviet Union drove the timeline. Apollo 1 caught fire on the launch pad in January 1967, killing three astronauts. Apollo 13 nearly didn't come home. Speed has consequences.

Artemis is being built for permanence, not just a flag and footprints. The goal is a sustained human presence on the Moon — bases, long-duration missions, international crews — and eventually Mars. For that to work, every piece needs to be proven before lives depend on it. Testing the landers in Earth orbit with astronauts aboard, where an abort can get the crew home in hours rather than days, is not excessive caution. It's engineering discipline.

The People Behind the Mission

NASA hasn't yet announced the Artemis III crew — that announcement is expected closer to the 2027 launch. But the Artemis program has already broken records.

Victor Glover, who flew on Artemis II in April 2026, became the first Black astronaut to travel to the Moon. Christina Koch, also on Artemis II, holds the record for the longest single spaceflight by a woman. The first woman to actually walk on the Moon will do so on Artemis IV — a milestone that has been fifty-plus years in the making.

The Bigger Picture

Artemis III is not the headline act. Artemis IV is. But Artemis III is what makes Artemis IV possible.

Without the data from Artemis II, engineers wouldn't know how Orion performs with a real crew in deep space. Without Artemis III, astronauts will have never practiced docking with the lunar landers or tested the AxEMU suits in the actual conditions of space. Every mission in the sequence does something the next one depends on.

What the Artemis program is attempting — steadily, methodically, with the resources of both government and private industry — is to permanently extend humanity's presence beyond Earth. Not a visit. A homecoming.

The Moon is the first step. Mars is the destination. And Artemis III, quiet and technical as it is, is one of the last doors humanity needs to open before someone sets foot on the lunar surface for the first time in over fifty years.