Learning from a Stiff Past
Iconic images from the Apollo missions show astronauts bounding across the lunar landscape. While groundbreaking, their movements were often clumsy. The stiff, pressurized suits made bending over difficult and falling a common risk. Astronauts had to
develop a sort of “bunny hop” to get around, expending precious energy fighting their own gear. The suits were custom-tailored and offered limited dexterity, making simple tasks like picking up a rock a major challenge. Vision was restricted, and the abrasive lunar dust ground away at the suit's outer layers, posing a constant threat. For the ambitious goals of the Artemis program, which include establishing a long-term presence, a simple repeat of this technology wasn't an option.
A New Commercial Approach
Instead of designing the suits entirely in-house, NASA has embraced a new commercial model. The agency awarded a contract to Houston-based Axiom Space to develop and provide the next-generation moonwalking suits as a service. This Axiom Extravehicular Mobility Unit, or AxEMU, builds on years of NASA's own research but leverages private sector innovation to accelerate development. In a unique collaboration, Axiom even partnered with Italian luxury fashion house Prada to contribute expertise on materials and manufacturing for the suit's outer layer, blending high fashion with high-tech engineering. This approach allows NASA to focus on the broader mission architecture while its commercial partners handle the specifics of the hardware, a model intended to be more cost-effective and adaptable.
Engineered for Unprecedented Movement
The single biggest upgrade in the AxEMU is mobility. The suit is engineered with highly articulated joints, using a system of advanced bearings and both hard and soft components that allow for a much greater range of motion. Unlike their Apollo predecessors, Artemis astronauts will be able to bend, squat, kneel, and twist at the waist. During demonstrations, engineers have shown off the ability to perform deep squats and lunges—movements that were impossible in the old suits. This enhanced flexibility means astronauts can walk more naturally, reducing fatigue and allowing them to interact with the lunar surface in complex ways, from collecting geological samples low to the ground to setting up intricate scientific equipment with greater precision.
More Than Just Bending and Twisting
Beyond flexibility, the AxEMU incorporates a host of other critical upgrades. A key change is the rear-entry hatch, which allows astronauts to slide into the suit from the back, a design that is easier to use and reduces the risk of shoulder injuries. The suits are also designed to be far more accommodating, fitting a wider range of body types for both men and women, which was a significant limitation in the past. The helmet features built-in HD cameras and powerful lights, essential for exploring the permanently shadowed craters of the lunar south pole where temperatures can plummet and sunlight never reaches. Advanced materials and coatings will also provide better protection against the harsh lunar dust and extreme temperature swings.
Enabling the Next Era of Exploration
These technological leaps are not just for comfort; they are essential for the scientific ambitions of the Artemis program. NASA is targeting the Moon's south pole, a region believed to hold water ice in its dark craters. Exploring this challenging and uneven terrain requires a level of mobility and endurance far beyond what Apollo astronauts had. The AxEMU is designed to support spacewalks of at least eight hours and can endure the extreme cold of shadowed regions for extended periods. By giving astronauts the tools to be true explorers rather than just visitors, these upgraded suits are a critical component in NASA's plan to build a sustainable human presence on the Moon and prepare for the next giant leap: sending humans to Mars.
