Artemis III Lunar Module Testing: Complete 2026 Progress Report
Key Takeaways
- Status Update: As of March 2026, NASA and SpaceX are conducting final vacuum chamber evaluations of the Starship Human Landing System (HLS) environmental controls.
- Cryogenic Milestones: SpaceX successfully demonstrated sustained cryogenic propellant transfer (liquid methane and oxygen) in Low Earth Orbit (LEO) earlier this year, clearing a major hurdle for the mission architecture.
- Uncrewed Demo: The Artemis III uncrewed lunar landing demonstration flight is scheduled to launch within the next 90 days.
- Axiom Spacesuits: The Axiom Extravehicular Mobility Unit (AxEMU) has passed thermal-vacuum testing and is now fully integrated with the HLS airlock mockup at Johnson Space Center.
Key Questions & Expert Answers (Updated: 2026-03-14)
Is Artemis III still launching in 2026?
Following the schedule readjustments made in early 2025, NASA is currently holding a target launch date of late 2026 for the crewed portion of Artemis III. However, this is heavily contingent on the upcoming uncrewed Starship HLS landing demonstration. If the uncrewed test requires significant redesigns, the crewed landing will likely slip into 2027.
What is the exact status of SpaceX's Starship HLS today?
SpaceX is in the late-stage integration phase for the flight hardware of the uncrewed demo module. As of this week, thermal protection systems and the complex elevator mechanism (used to transport astronauts from the cabin to the lunar surface) are undergoing continuous cycle testing at the Boca Chica facility.
How did the in-orbit cryogenic refueling tests go?
The "ship-to-ship" propellant transfer tests conducted in early 2026 were successful. SpaceX demonstrated the transfer of over 10 metric tons of super-chilled liquid oxygen and methane between two Starships in LEO, proving the viability of the "depot" architecture essential for sending the HLS to the Moon.
Table of Contents
1. The Road to Artemis III: Where We Stand Today
Today marks March 14, 2026. Humanity is closer to returning to the lunar surface than at any point since Apollo 17 in 1972. The Artemis III mission—designed to land the first woman and the first person of color on the Moon near the lunar South Pole—relies on an incredibly complex architecture of rockets, spacecraft, and orbital logistics.
Unlike the Apollo missions, which utilized a single Saturn V launch to carry both the command module and the lunar lander, Artemis III relies on a distributed launch architecture. NASA's Space Launch System (SLS) will carry the Orion spacecraft and its crew, while SpaceX's Starship system will handle the lunar landing. The synchronization of these elements requires rigorous, exhaustive testing of the Artemis III lunar module hardware.
2. SpaceX Starship HLS: The Primary Lunar Module
The Starship Human Landing System (HLS) is a drastically modified version of the standard Starship currently being tested in South Texas. The HLS lacks the aerodynamic fins and heat shield required for Earth reentry, as it will remain in space once launched, operating exclusively between Earth orbit and the lunar surface.
Testing in early 2026 has focused heavily on the unique hardware required for lunar operations. Because the HLS stands over 160 feet (50 meters) tall, the crew cabin is located high above the surface. Consequently, SpaceX and NASA engineers have been rigorously testing the mechanical elevator system. Last month at the Marshall Space Flight Center, a full-scale mockup of the elevator was subjected to simulated lunar dust (regolith) to ensure the winches and rails do not jam in the highly abrasive lunar environment.
3. Cryogenic Fluid Management (CFM) Breakthroughs
Perhaps the most technically daunting aspect of the Starship HLS architecture is the requirement to refuel in orbit. To break out of Earth's gravity well and reach the Moon with enough payload capacity, the HLS must be fully fueled in Low Earth Orbit (LEO) by a dedicated "Depot" Starship, which itself is filled by multiple "Tanker" Starships.
As of recent mission reports from February 2026, SpaceX successfully executed a sustained transfer of cryogenic liquid methane and liquid oxygen between two vehicles in microgravity. Why is this difficult? In zero gravity, liquids do not settle at the bottom of a tank; they float in globules. SpaceX utilized a small amount of forward thrust (ullage) to settle the propellants before engaging the transfer pumps. This successful milestone essentially validated the core architectural premise of the Artemis III landing plan.
4. Environmental Control and Life Support Systems (ECLSS)
A lunar module is not just a vehicle; it is a habitat. For Artemis III, astronauts will live inside the Starship HLS for roughly a week during the lunar surface operations. The ECLSS must provide breathable air, regulate cabin pressure, remove carbon dioxide, and maintain a stable temperature amidst the extreme thermal shifts of the lunar South Pole.
Currently, vacuum chamber tests are being conducted on the HLS ECLSS modules at NASA’s Johnson Space Center. Engineers are deliberately injecting high levels of CO2 and moisture into the closed-loop system to test the efficiency of the scrubbers. Data from these tests as of early March indicates that the system is operating within a 2% margin of error of its theoretical maximum efficiency, clearing the way for human-in-the-loop (HITL) testing later this spring.
5. Axiom Spacesuit Integration
No lunar module test is complete without verifying its interaction with the extravehicular mobility units (spacesuits). Axiom Space, contracted to build the AxEMU suits for Artemis III, has been conducting joint integration tests with the HLS hardware.
Astronauts in full AxEMU gear have been practicing egress and ingress procedures using the HLS airlock mockup. These tests verify that the hatch dimensions, umbilical connections, and handholds are ergonomically suited for astronauts wearing pressurized suits. Additionally, the suits are being tested against the HLS life support umbilicals to ensure seamless transition from vehicle-supplied oxygen to the suit's portable life support system (PLSS).
6. Future Outlook & Next Steps
Looking ahead from our current vantage point in March 2026, the aerospace community is bracing for the critical uncrewed Starship HLS demonstration mission. This flight will launch the HLS into orbit, refuel it via the orbital depot, and send it to the Moon for an autonomous landing.
If the uncrewed landing is successful, it will set the stage for the Artemis III crew to launch aboard the Orion spacecraft later this year. Once Orion arrives in the Near Rectilinear Halo Orbit (NRHO) around the Moon, it will dock with the waiting Starship HLS. If, however, the uncrewed demo uncovers issues with the landing radar, terrain-relative navigation, or engine plume interactions with the lunar surface, NASA will mandate a secondary uncrewed test, pushing the historic crewed landing into 2027.
7. Frequently Asked Questions (FAQ)
Why does the Artemis III lunar module need to be refueled in space?
Unlike the small Apollo lunar module, the SpaceX Starship HLS is a massive vehicle capable of carrying dozens of tons of payload. Launching a vehicle this large from Earth requires immense fuel. By the time it reaches orbit, its tanks are nearly empty. Refueling in Low Earth Orbit gives it the necessary delta-v (change in velocity) to travel to the Moon, land, and ascend back to lunar orbit.
Where will the Artemis III module land?
The mission targets the lunar South Pole. This region is of massive strategic and scientific importance because its permanently shadowed craters are believed to contain water ice. This ice can be harvested for drinking water, oxygen, and rocket propellant in future missions.
Who is building the lunar module for Artemis III?
SpaceX is the sole provider for the Artemis III lunar module, using a modified version of their Starship vehicle. Blue Origin is currently developing an alternative lander (Blue Moon) for the later Artemis V mission.
How do astronauts transfer from Orion to the HLS?
The Orion spacecraft, launched by NASA's SLS rocket, will fly to a Near Rectilinear Halo Orbit (NRHO) around the Moon. The Starship HLS will already be waiting in this orbit. The two vehicles will dock, and the crew will transfer through an airtight tunnel into the Starship before descending to the lunar surface.
What happens if the uncrewed test fails?
If the upcoming uncrewed HLS landing demonstration fails, NASA and SpaceX will conduct a failure analysis, implement hardware or software fixes, and fly another uncrewed test. NASA maintains a strict "safety first" policy, meaning the crewed Artemis III mission will not launch until a successful uncrewed landing has been proven.