NASA has turned the concept of a sustained presence on the Moon into a very concrete list of engineering challenges. On September 8, the agency released the final solicitation for the NextSTEP-3 Lunar Enabling Infrastructure Accelerator program, calling on industry, academia, nonprofits, and U.S.-led international teams for proposals on technologies needed for a settlement in the lunar South Pole region.
The five priority areas illustrate what building a base actually entails far better than any rendering: generating electricity, producing oxygen from the soil, operating in the dark, manufacturing materials away from Earth, and developing advanced components on-site. These are not yet awarded contracts. NASA is seeking proposals and may use the resulting data and demonstrations to inform future acquisition strategies.
Vertical solar towers to chase the light
The lunar South Pole features regions that receive light for relatively long periods, alongside deep shadows. NASA is seeking vertical solar arrays capable of elevating panels above the ground and combining generation, distribution, and storage.
Building a tower on the Moon is nothing like installing one in the desert. Reduced gravity, abrasive dust, thermal swings, and transportation constraints limit mass and mechanisms. Every kilogram launched comes at a cost.
Oxygen from regolith
Lunar soil contains oxygen chemically bound to minerals. Extracting it could provide breathable air and, down the line, oxidizer for propellants without shipping everything from Earth.
The process requires energy and equipment capable of processing abrasive material in an extreme environment. Yet in-situ resource utilization is crucial, as a sustainable base cannot depend forever on every liter and kilogram sent from home.
Radioisotopes for areas where the Sun falls short
NASA includes Stirling generators powered by the heat of radioactive materials to deliver power in remote, dark, and dusty regions. Combining energy sources is essential, as some missions cannot afford to shut down during long periods without light.
Stirling generators convert temperature differences into mechanical motion and ultimately electricity, offering a more efficient use of heat than traditional passive radioisotope systems.
Manufacturing in space reduces reliance on Earth
In situ manufacturing is perhaps the most ambitious step. If tools, spare parts, or structures can be produced locally, the base becomes more resilient. Every breakdown will no longer require waiting for a resupply mission.
Initially, production will likely be limited to relatively simple components. But learning to use local materials or feedstock brought from Earth is a necessary step for long-duration missions.
Nanomaterials can leverage unique conditions
NASA also includes the advanced manufacturing of nanomaterials. Microgravity, vacuum, and the lunar environment can offer conditions distinct from those on Earth for certain processes.
The goal is not only to support the base. If materials with commercial value were to emerge, the Moon could become a production site as well as an exploration destination. It is still a distant prospect, but the program aims to begin testing it.
A base is a system, not a single vehicle
The Artemis program has often focused attention on rockets and landers. A lasting presence, however, requires power, communications, mobility, maintenance, and resources. The new solicitation shifts the focus squarely onto infrastructure.
It is a natural evolution. Getting to the Moon once is a mission challenge; staying there is a matter of economics and logistics.
NASA is using procurement to build a market
Involving private companies allows the agency to fund multiple approaches and enable certain technologies to find commercial applications beyond a single program. This is the rationale already used in commercial cargo and crew.
Not all proposals will become operational systems. The program's value lies in creating expertise and prototypes capable of competing.
The South Pole is strategic for water
Permanently shadowed regions near the South Pole contain water ice deposits detected by previous missions. Water can serve the crew and, when split into hydrogen and oxygen, provide propellant.
This makes the base's geography part of the energy and logistics strategy. Access to resources and access to sunlight do not necessarily coincide, meaning infrastructure must connect different areas.
The Moon Base is not yet a city ready to be built
NASA’s language is explicit about the goal of a sustained presence, but timeline, budget, and configuration will depend on political decisions and technical results. It would be a mistake to read the solicitation as an announcement of a fully funded, complete base.
It is, however, a concrete step: needs are translated into requirements that companies and laboratories can work on. Before living on the Moon, it is necessary to learn how to produce oxygen, power, and spare parts. NASA is starting to buy that very knowledge.
