1. The Evolution of Artemis 3 Landing Sites
The journey to finalize the Artemis 3 landing site has been a rigorous, multi-year process merging planetary science, astrodynamics, and engineering constraints. When NASA first announced the Artemis 3 candidate regions in late 2022, they presented a list of 13 distinct zones measuring roughly 15 by 15 kilometers each.
These original regions included Faustini Rim A, Peak Near Shackleton, Connecting Ridge, Connecting Ridge Extension, de Gerlache Rim 1 and 2, de Gerlache-Kocher Massif, Haworth, Malapert Massif, Leibnitz Beta Plateau, Nobile Rim 1 and 2, and Amundsen Rim. However, as the 2026 launch window approaches, the reality of orbital mechanics and hardware readiness has forced NASA to narrow this list significantly.
As of March 2026, the scientific community and NASA's cross-disciplinary selection committees have transitioned from broad regional analysis to high-resolution, specific landing ellipses within just a handful of these regions. The refinement process utilizes continuous streams of data from the Lunar Reconnaissance Orbiter (LRO), ensuring that topological anomalies that were invisible a decade ago are fully accounted for.
2. Core Selection Criteria: What Makes a Good Site?
Selecting a lunar landing site in the 21st century requires balancing the safety of the crew with unprecedented scientific ambition. The criteria for Artemis 3 are vastly more restrictive than those of the Apollo missions, which primarily landed in the flat, well-lit equatorial regions.
- Lighting Conditions: The Lunar South Pole experiences extreme lighting dynamics. The sun hovers perpetually near the horizon, casting shadows miles long. A viable landing site must offer continuous sunlight for the planned 6.5-day surface mission to provide solar power and adequate thermal regulation.
- Earth Communication: Direct line-of-sight communication with Earth is critical. Because the Artemis architecture relies on the Deep Space Network, the landing site cannot be situated in a topological "blind spot" that drops radio contact during critical mission phases.
- Terrain Topography: The surface must be exceptionally flat. The allowable slope angle is highly constrained by the physical footprint of the lander. Furthermore, the region must be free of large boulders and hazardous craterlets.
- Proximity to PSRs: The primary scientific objective is to sample volatile materials from Permanently Shadowed Regions. Therefore, the landing site must be a safe, well-lit plateau that is within walking distance (via the Axiom extravehicular mobility suits) of a dark, icy crater.
3. The SpaceX Starship HLS Factor
Perhaps the most significant driver of the recent 2026 site selection updates is the lander itself. During the Apollo era, the Lunar Module was relatively small. By contrast, the SpaceX Starship Human Landing System (HLS) is a towering behemoth, standing over 50 meters tall.
The sheer scale of Starship introduces unique variables. Plume Surface Interaction (PSI) is a major concern; the massive Raptor engines will kick up a tremendous amount of lunar regolith upon descent. NASA scientists have had to model how this high-velocity dust might obscure sensors or damage the surrounding scientific areas of interest.
Additionally, the towering center of gravity of the Starship HLS demands a nearly perfectly level landing pad to prevent tipping. This strict slope tolerance has effectively eliminated several of the original 13 regions that featured slightly undulating terrain, leading to the current narrowed focus on wide, flat massifs and ridges.
"The architecture of the Starship lander rewrote our topographical rulebook. We aren't just looking for a clear spot; we're looking for an ultra-flat foundation capable of supporting a skyscraper on the Moon." — NASA Planetary Geology Team Memo, early 2026.
4. Deep Dive: The Top Contenders in 2026
With the September 2026 launch date looming, two primary locations have emerged as the dominant frontrunners for the Artemis 3 touchdown.
Mons Mouton
Formerly referred to as a plateau near the crater Nobile, Mons Mouton is a sprawling, flat-topped mountain standing taller than Denali. It is arguably the most extensively studied region at the South Pole. Mons Mouton offers vast stretches of flat terrain and excellent, prolonged sunlight. Furthermore, because it was originally the target site for NASA's VIPER rover (before program adjustments), scientists already possess an incredibly robust map of its surface hazards and resource potential.
Shackleton Connecting Ridge
The ridge connecting the Shackleton and de Gerlache craters remains an incredibly enticing option. This "Connecting Ridge" offers some of the most dramatic access to deep, permanently shadowed craters. It serves as a natural bridge providing constant line-of-sight to Earth while granting astronauts immediate, short traverse distances into the dark regions where water ice is most likely to be found on the surface.
5. Geological and Scientific Objectives
Whichever site is ultimately finalized, the scientific yield of Artemis 3 is expected to fundamentally alter our understanding of the Solar System. When the crew steps out onto the surface wearing their Axiom Extravehicular Mobility Units (AxEMU), their primary directive will be to execute core sampling.
By driving specialized tools into the lunar soil at the edge of the PSRs, astronauts aim to extract cryogenically preserved samples of lunar ice. These volatile compounds act as a time capsule. Studying the isotopic composition of this ice will reveal whether the Moon's water was delivered by ancient comets, generated by solar wind interacting with lunar dust, or released from volcanic outgassing from the Moon's interior billions of years ago.
6. Frequently Asked Questions (FAQ)
Why did NASA delay Artemis 3 to 2026?
How many astronauts are going on Artemis 3?
Is the Lunar Gateway involved in Artemis 3?
Can we see the landing site from Earth?
Will Artemis 3 build a permanent base?
7. Future Outlook & Next Steps
As we navigate through the Spring of 2026, the final decision regarding the Artemis 3 lunar surface landing site is imminent. NASA is expected to formally lock in the primary landing ellipse and its backup sites by mid-summer, finalizing the exact descent trajectory for the Starship HLS.
The success of the Artemis 3 landing site selection will set the precedent for humanity's permanent presence on the Moon. Finding that perfect balance between solar illumination, Earth communication, and access to water ice is the key that unlocks the door to Mars and deep space exploration for generations to come.