China Develops Solar Powered Machine to Turn Moon Soil Into Construction Bricks

Sunlight and Moon Dust Could Supply Lunar Building Sites

Chinese scientists have developed a machine that concentrates solar energy more than 3,000 times compared with normal sunlight on Earth, reaching temperatures above 1,300°C to turn lunar soil into construction bricks. The technology could supply materials for roads, landing pads, equipment platforms and protective shells around future Moon habitats without transporting those heavy materials from Earth.

Developed at the Deep Space Exploration Laboratory (DSEL) in Hefei, the device combines a curved reflector, fiber optics and a process similar to 3D printing. It needs no water, chemical binders or other additives to make the bricks. Its raw material is regolith, the dusty soil covering the lunar surface.

As of August 17, 2025, the work is part of a broader Chinese effort to prepare for construction on the Moon. Laboratory testing has used simulated lunar soil and artificial sunlight, while simulated lunar bricks were sent to China's Tiangong space station in November 2024 for testing in space.

The immediate purpose is practical infrastructure rather than complete houses made entirely from bricks. The material is intended to protect separate habitat modules that hold breathable air, as well as provide solid surfaces for equipment and spacecraft operations.

China's longer ambition reaches further: robots that manufacture, move and assemble building materials using local resources and solar energy. Such a system could help establish permanent lunar bases and, eventually, support much larger settlements. Before that can happen, engineers must understand how the materials perform in space and connect brick production with automated construction.

How the Machine Turns Light Into Heat

A large parabolic reflector sits at the heart of the system. This curved mirror collects sunlight and focuses it, gathering energy that would otherwise fall across a wider area. Bundles of optical fibers then carry the concentrated light to the point where the soil is processed.

The system intensifies solar energy more than 3,000 times relative to normal sunlight on Earth. At its focal point, temperatures rise above 1,300°C, or 2,372°F, hot enough to melt lunar regolith.

The melted material is shaped into bricks through a process similar to 3D printing. Instead of relying on water or an added substance to hold loose particles together, the machine uses heat to turn the soil itself into a dense, solid building material.

That combination matters for lunar construction. A process that requires imported ingredients would still depend on deliveries from Earth. By making bricks from regolith without binders or additives, the DSEL design aims to reduce the amount of material that construction missions must carry.

Two Years of Work on Soil and Solar Energy

The development effort lasted two years and addressed two central engineering problems: differences in lunar soil and the need to deliver concentrated solar energy efficiently.

Lunar regolith varies in composition from place to place. A machine intended for construction on the Moon must therefore work with more than one carefully selected soil mixture. The DSEL team created multiple simulated regolith samples to test how the process handled that variation.

The reflector and fiber optic system presented another challenge. Collecting sunlight is only part of the task. Engineers also needed to transmit and focus that energy precisely enough to produce the heat required for melting.

Extensive laboratory tests used simulated lunar soil and artificial sunlight. Those tests confirmed that the process could reliably produce bricks with the strength and durability required for the proposed construction uses. Testing the materials in space is another part of assessing their suitability for lunar conditions.

Why Local Materials Matter on the Moon

Transporting heavy building supplies from Earth to the Moon is expensive and complicated. Every kilogram launched adds cost and risk, making construction that depends entirely on deliveries difficult to sustain.

The alternative is known as in situ resource utilization, or ISRU. In plain language, it means using materials found at the destination instead of bringing everything from home. For this project, the local resource is the fine, powdery regolith spread across the Moon's surface.

Regolith is abundant and can be shaped into solid structures after melting. Using it for bulk construction could reduce mission expenses and make long stays on the Moon more practical. The machine's ability to work without additives is a central part of that approach.

The proposed products serve several different needs. Roads would provide prepared routes across construction areas. Landing pads and equipment platforms would create solid working surfaces. Bricks assembled around habitat modules would form protective outer shells.

China's wider construction concept joins those uses into a single workflow: produce the material near the building site, transport it with robots and assemble it into structures. The benefit would come from reducing both the cargo sent from Earth and the human labor required in a hazardous environment.

What the Tiangong Tests Will Examine

Simulated lunar bricks reached China's Tiangong space station aboard the Tianzhou-8 cargo spacecraft in November 2024. The testing program calls for astronauts to expose the samples to harsh space conditions, including extreme temperature changes, radiation and microgravity.

The assessments cover mechanical strength, resistance to temperature changes and radiation shielding. Each property affects a different part of construction: whether a brick remains strong, how it handles heating and cooling, and how effectively it can help protect a habitat.

The material tests form part of the work needed before deploying the brick making technology on the Moon. No date was given for sending the machine to the lunar surface or for completing the space testing program.

The development milestones and plans span several years:

• November 2024: Simulated lunar bricks were delivered to Tiangong aboard Tianzhou-8 for testing in space.
• April 2025: Participation in China's International Lunar Research Station initiative had reached 17 countries and more than 50 international research institutions.
• August 17, 2025: The solar powered brick machine was part of China's preparations for future lunar construction.
• 2035: China aims to establish a basic International Lunar Research Station facility at the lunar south pole.
• The 2040s: An expanded version of the research station is planned.

Bricks Would Protect Habitats, Not Hold Their Air

The bricks are dense and robust, but they cannot maintain internal atmospheric pressure in the Moon's vacuum and low gravity. A usable lunar home would therefore combine different types of construction, with each serving a particular job.

Rigid or inflatable habitat modules would provide the pressurized interior. The bricks would form an outer protective layer around those modules. This arrangement separates the need to keep air inside from the need to shield people and equipment from conditions outside.

Radiation shielding is one proposed function of the brick shell. The material would help protect against harmful cosmic rays and solar radiation. Its density would also help defend the habitat against impacts from micrometeorites, tiny objects traveling at high speed.

Temperature protection is another purpose. The lunar surface can range from -173°C at night to 127°C during the day. A protective brick layer could help moderate those extreme changes around a habitat, supporting the systems that maintain conditions inside.

The distinction shapes what the machine is being developed to build. Its bricks could become part of a protected living space, but the plan still requires a separate module capable of maintaining the internal atmosphere.

Robots Would Make, Move and Assemble the Bricks

Automated construction is central to the next stage of the project. If material testing succeeds, the proposed next step is to integrate the brick making machine with robotic systems that can manufacture and assemble lunar infrastructure.

The intended process extends beyond producing individual blocks. Robots would need to move the bricks and place them into modular structures. Fleets of machines could then build roads, landing pads and protective shells while reducing the amount of work people must perform on the lunar surface.

Yang Honglun, a senior engineer on the project, described the goal as a complete construction process based on local resources and solar energy:

Our goal is to create a fully automated construction process on the lunar surface, where robots manufacture and assemble building modules using only local resources and solar energy. This will enable a permanent human presence on the Moon.

The ambition is to make construction repeatable and capable of expanding as a base grows. Producing bricks, transporting them and assembling them would need to operate together to support construction on a large scale.

How the Project Fits China's Lunar Plans

DSEL is a national research hub founded jointly by the China National Space Administration (CNSA), the Anhui provincial government and the University of Science and Technology of China. Its work extends beyond making bricks to energy capture, water extraction and infrastructure planning for missions to the Moon and Mars.

The International Lunar Research Station (ILRS) provides a wider setting for the construction effort. China plans the station in two phases, beginning with a basic research facility at the lunar south pole by 2035 and followed by an expanded model in the 2040s.

By April 2025, 17 countries and more than 50 international research institutions had joined the initiative. That participation reflects growing international interest in lunar exploration and in the infrastructure needed to support it.

Local construction materials could help support the station's development by reducing dependence on heavy supplies from Earth. The brick machine is one element of that work, alongside the energy, water and planning technologies being developed for a lasting presence.

Several Approaches to Building on the Moon

China is pursuing lunar construction alongside other international efforts. In the United States, NASA's Artemis program is also developing ways to use lunar regolith for habitats and infrastructure.

China's rapid progress and demonstration of a system combining solar energy with additive manufacturing place it among the leaders pursuing this technology. Additive manufacturing is the approach behind 3D printing, in which material is formed into a planned shape during production.

Other Chinese research teams have explored different methods. Some use binders to hold regolith together. Others study sintering lunar soil into bricks and assembling it with robotic masons. Sintering uses heat to join particles into a solid material.

Natural lunar tunnels, known as lava tubes, have also been proposed as shelters. These ideas address the same broad need through different routes: manufacturing building materials, assembling structures or making use of existing features of the Moon.

The effort carries scientific and political stakes as well as engineering demands. Establishing a sustainable lunar base could set important precedents for resource use, governance and international cooperation. Growing participation in lunar projects makes construction a focus of both collaboration and competition.

Possible Uses Beyond Lunar Construction

The principles behind the DSEL machine could also be adapted for Mars and other celestial bodies, where transporting building materials from Earth would be even more costly. Using local resources and solar energy could help future missions become more self sufficient.

The same combination of concentrated sunlight, automated 3D printing and robotic assembly has potential uses on Earth, particularly in remote places or areas where resources are scarce. These are possible applications of the underlying technologies, while the current project focuses on preparing materials and systems for lunar construction.

The immediate work remains concrete: assess the bricks in space, understand how they respond to difficult conditions and develop the robotic systems needed to turn individual blocks into useful infrastructure. Those steps connect a laboratory machine in Hefei with China's longer plans for permanent bases and, eventually, lunar cities.

Key Points

• DSEL in Hefei developed a machine that uses sunlight and lunar regolith to make construction bricks without water, binders or other additives.
• A parabolic reflector and fiber optics concentrate solar energy more than 3,000 times, producing temperatures above 1,300°C.
• Laboratory testing used different simulated lunar soils and artificial sunlight during a development effort lasting two years.
• Simulated lunar bricks reached Tiangong aboard Tianzhou-8 in November 2024 for tests of strength, temperature resistance and radiation shielding.
• The bricks are intended for roads, landing pads, equipment platforms and protective shells around separate pressurized habitat modules.
• China aims to combine brick production with robotic construction and establish a basic lunar research station at the south pole by 2035, followed by expansion in the 2040s.