1. The Evolution of Artemis III Landing Sites
The journey to select the landing site for Artemis III—the mission that will land the first woman and the first person of color on the Moon—has been a multi-year effort combining orbital mechanics, geology, and mechanical engineering. In 2022, NASA announced an initial list of 13 candidate regions near the Lunar South Pole. Each of these regions measured roughly 15 by 15 kilometers.
However, as the mission architecture matured throughout 2024 and 2025, it became clear that not all 13 sites were viable. Data returned by the Lunar Reconnaissance Orbiter (LRO), coupled with advanced supercomputer modeling of the Moon's complex polar lighting, revealed that several sites posed unacceptable risks regarding temperature swings, communication dropouts with Earth, and extreme shadowing.
By early 2026, the Cross-Program Site Selection Analysis team, integrating input from SpaceX (HLS provider) and Axiom Space (spacesuit provider), systematically eliminated regions with overly hazardous terrain, reducing the list to a highly vetted few.
2. The Final Shortlist: Top Contenders as of March 2026
Today, mission planners are agonizing over a few prime pieces of lunar real estate. The selection is a delicate balance of competing interests: the engineers want flat, safe, well-lit terrain, while the geologists want dangerous, dark, and deep craters where the oldest ice resides.
| Candidate Region | Primary Advantage | Primary Challenge |
|---|---|---|
| Malapert Massif | Exceptional line-of-sight to Earth; highly stable solar illumination. | Further walking distance to the deepest, most pristine Permanently Shadowed Regions. |
| Peak Near Shackleton | Direct, immediate access to one of the Moon's largest polar ice traps. | Incredibly challenging terrain; narrow landing ellipses; severe shadowing risks for EVAs. |
| Mons Mouton | Large, flat plateau; geologically diverse surface samples. | Lighting conditions are highly dependent on the exact week of launch. |
Malapert Massif is currently favored by mission assurance teams. Its high elevation offers a commanding view of the Earth, ensuring unbroken Direct-to-Earth (DTE) communication via the Deep Space Network (DSN). However, Shackleton remains the darling of the planetary science community due to the tantalizing prospect of extracting core samples of ancient lunar ice.
3. Crucial Selection Criteria for the Lunar South Pole
Unlike the Apollo missions, which landed near the lunar equator on broad, flat maria bathed in two weeks of continuous, overhead sunlight, Artemis III is targeting the harsh environment of the South Pole. The sun never rises more than a few degrees above the horizon here, creating long, deep shadows and blinding glare.
- Illumination Dynamics: The astronauts will spend approximately 6.5 days on the surface. The landing site must provide continuous sunlight for the Starship's solar arrays to generate power, and to keep the astronauts warm during their surface EVAs.
- Earth Communication: Because the Moon is tidally locked, polar regions sit right on the edge of the visible lunar disc. A slight miscalculation could put the landing site out of the Earth's line of sight, severing communication unless orbital relays (like the Lunar Gateway, which won't be heavily utilized for Artemis III's initial descent) are in perfect position.
- Proximity to PSRs: The primary scientific goal is to step into a Permanently Shadowed Region. The landing site must be well-lit, but within a 2-kilometer walking distance of a PSR, dictated by the life support limits of the Axiom Extravehicular Mobility Unit (AxEMU) spacesuits.
4. SpaceX Starship HLS Constraints
The physics of landing the SpaceX Starship HLS dramatically influence site selection. At 50 meters tall, Starship is a skyscraper compared to the Apollo Lunar Module (LM).
Plume Surface Interaction (PSI): The Starship relies on highly modified Raptor engines for its final descent. As of late 2025 testing, NASA and SpaceX concluded that the immense thrust could excavate a massive crater or blast rocks outward at orbital velocities. The landing site must have a sufficiently dense regolith layer to prevent catastrophic blowout, and ideally, be clear of large boulders that could be deflected upward.
Slope Tolerances: Starship's towering height gives it a high center of gravity. Landing on a slope greater than a few degrees could cause the vehicle to tip. LRO data is currently being scrutinized at sub-meter resolutions to map every undulation in the final candidate zones.
Elevator Clearance: Astronauts will descend from the crew cabin to the surface via a mechanical elevator. The terrain immediately beneath the elevator's deployment zone must be flat enough to allow the platform to settle safely and allow astronauts to step out onto the lunar surface without a dangerous drop.
5. Scientific Objectives and EVA Architecture
The science yield from Artemis III will redefine our understanding of the Solar System's history. The primary tool for this is the human element, clad in the new Axiom Space AxEMU suits.
The chosen site will dictate the EVA timelines. Because the sun is so low on the horizon, astronauts will experience intense, high-contrast lighting. They will use specialized lunar flashlights and visor systems to see into the inky blackness of the PSRs.
Their primary objective: collect cryogenic ice cores. If they land near Shackleton, they will carefully venture into the shadowed rim, deploying specialized insulated core drills. These samples must be kept cryogenically frozen throughout the return trip to Earth aboard Starship and Orion—a logistical chain that NASA engineers in early 2026 are finalizing down to the last thermal wrap.
6. Future Outlook and Next Steps
As we pass the first quarter of 2026, the window for theoretical debate is closing. NASA's hardware is physically coming together at Michoud Assembly Facility, Kennedy Space Center, and SpaceX's Starbase.
By Summer 2026, the final site will be locked in. Once announced, the orbital mechanics teams will finalize the launch window for the Space Launch System (SLS) and the preceding SpaceX tanker flights required to fuel the HLS in low Earth orbit.
The ultimate choice of landing site for Artemis III will not just be a point on a map; it will be the foundation for the Artemis Base Camp and the future of lunar industrialization.