Lunar dust could be used as a building material for future bases on the Moon

A 384,400-kilometer mission

Seen from Earth, the Moon appears to be a peaceful celestial body. But up close, the reality is quite different. It is a hostile world, where temperatures swing between scorching heat and freezing cold. The air is unbreathable, and fine, abrasive dust clings to every surface.

In this environment, how can we imagine a sustainable human presence? If men and women are to stay there for months, or even years, it’s unthinkable to ship everything from Earth. Every brick, every beam, and every tool adds weight and cost. Rockets, like budgets, have their limits.

That’s why scientists are exploring a radical solution: building with materials already available on site. That gray powder covering the lunar surface—regolith—could become the raw material for constructing shelters, landing strips, and even tools. A new study shows how a laser 3D printing method can transform this dust into solid, heat-resistant structures.

Turning Dust into High-Tech Material

For their experiments, the researchers did not use actual lunar dust, but rather a synthetic version known as regolith simulant. Using a high-power laser, they melted this fine powder, layer by layer. Each new molten layer bonded to the base beneath it, creating small objects capable of withstanding extreme temperatures.

The simulant used, called LHS-1, is a replica of the soil found on the lunar highlands. This is a heavily cratered region rich in dark basaltic rocks. This choice is by no means arbitrary: the chemical composition of the soil varies from one region of the Moon to another. If astronauts land on these highlands, they will have to work with materials that behave similarly to LHS-1.

This approach is part of a broader strategy known as “in situ resource utilization.” The principle is simple: use local resources at a mission site rather than transporting everything from Earth. For NASA’s Artemis program, which aims to establish a long-term human presence on the Moon by the end of this decade, this method could drastically reduce costs and risks. Fewer resupply missions mean fewer launch windows to meet and reduced dependence on Earth.

A detail that changes everything: the printing surface

Printing with lunar dust isn’t as simple as melting sand. The team tested the process’s effectiveness under various environmental conditions. One factor proved crucial: the surface onto which the layers were printed.

LHS-1 printing tests on stainless steel and glass proved challenging. The material did not adhere properly. However, when the researchers used an aluminosilicate ceramic surface, the simulant bonded much more effectively. The most likely reason is that the two materials form crystals together, which improves the thermal stability and mechanical strength of the structure.

Sizhe Xu, the study’s lead author and a research associate with a degree in industrial systems engineering at Ohio State University, highlights the sensitivity of the process. “By combining different raw materials, such as metal and ceramic, in the printing process, we found that the final material is highly sensitive to its environment,” he explains. “Different environments lead to different properties, which directly affect the mechanical strength and thermal shock resistance of certain components.” In short, even the slightest variation can make or break the success of the final product. This is a major challenge when planning to build on the Moon, where conditions are anything but forgiving.

When Space Imposes Its Own Rules

The researchers didn’t stop at varying the base surface. They also studied the impact of oxygen levels, laser power, and printing speed. Each of these factors influenced the stability and strength of the final structure. The challenge is immense, as recreating space conditions on Earth is no easy feat.

Sarah Wolff, senior author of the study and assistant professor of mechanical and aerospace engineering at Ohio State University, highlights this difficulty. “There are conditions that occur in space that are really difficult to mimic in a simulator,” she explains. “It may work in the lab, but in an environment where resources are scarce, you have to try everything to maximize a machine’s flexibility for different scenarios.”

Space presents an extreme vacuum, sudden temperature changes, and dust so fine that it seeps into joints and mechanisms. Any manufacturing system sent there must be able to survive this environment. Engineers cannot assume that what works in a controlled laboratory will behave the same way 384,400 kilometers away.

From the Moon to Earth: A Two-Way Innovation

Currently, the team’s printing system runs on electricity. On the Moon, energy will be a precious resource. Solar power is an obvious option, particularly near the lunar South Pole, where certain areas enjoy long periods of sunlight. The study suggests that future versions of the printer could be developed with solar or hybrid power systems.

Additive manufacturing, or 3D printing, is already commonplace on Earth. It allows engineers to build complex shapes without having to carve them out of blocks of material. In space, this flexibility could be even more valuable. Astronauts could print spare parts, tools, or structural components as needed, without having to wait for the next resupply mission. Sizhe Xu sees immense potential: “There are so many applications we’re working toward that, with new information, the possibilities are endless.”

But this research isn’t just about life on the Moon. Sarah Wolff is convinced that this work could have positive implications on Earth. “If we can make things in space using very few resources, that means we can also achieve greater sustainability on Earth,” she says. "To that end, improving the machine’s flexibility for different scenarios is a goal we’re working very hard on." Manufacturing with limited resources forces engineers to think differently, reduce waste, and design adaptable machines—skills that are crucial here on Earth, where supply chains can break down. The full study was published in the journal Acta Astronautica.

Source: earth.com

Lunar dust could be used as a building material for future bases on the Moon