Before helium-3 can become a product delivered from the Moon, developers need to establish what is in the regolith and how reliably it can be recovered. Mission planning and prototype machinery are tackling different parts of that problem.
A lunar helium-3 operation would need to move soil, release gases and separate a useful product, all within the constraints of equipment sent from Earth. Before engineers can size that operation, they need reliable information about the ground it would work on.
Two strands of development show how that question is being approached. Black Moon Energy’s proposed Fusion 1 mission focuses on characterising a lunar resource. Interlune and industrial equipment manufacturer Vermeer Corporation have developed an excavation prototype intended for a future harvesting system.
The distinction matters. Resource measurement helps establish what equipment must handle; machinery tests examine whether a proposed process can do the work. Both are needed to connect a promising material with a credible production plan.
From lunar soil to a measured resource
The loose material covering the Moon’s surface is known as regolith. Solar-wind gases held in this material are among the targets for lunar resource development. Extracting and measuring those gases can help determine what a particular location might provide.
Black Moon Energy describes Fusion 1 as a proposed survey of an operational area in Mare Tranquillitatis. Its planned year-long traverse would investigate helium-3 and other volatiles, how gases are released under different thermal conditions, and the physical characteristics of the terrain and regolith.
These objectives address different engineering uncertainties. Concentration affects how much material must be processed. Release behaviour helps inform the extraction approach. Terrain characteristics influence how equipment can move and work. The measurements would need to be considered together when designing a larger operation.
The company also proposes demonstrating robotic operation through lunar day and night cycles. These remain mission objectives, rather than results from an already operating helium-3 mine.
Why the measurement chain matters
NASA announced a $6.9 million contract with Interlune in May 2026 to advance resource-prospecting technology. The work includes equipment designed to collect regolith, sort particles, release volatile gases, and measure their quantities.
NASA describes a mass spectrometer in the proposed payload inspired by its MSOLO technology. A mass spectrometer helps identify gases by measuring the mass and charge of their ions.
For resource assessment, the useful result is more than a signal that helium is present. Engineers need to relate the recovered gas to the amount and type of material processed and the conditions used to release it. That relationship supports a calculation of recovery performance.
It also helps separate resource characterisation from production claims. Detecting material at one location does not, on its own, establish the output of a future operation across a larger working area.
Excavation is one stage of the process
In May 2025, Interlune and Vermeer unveiled a full-scale excavator prototype. They described a design intended to handle 100 metric tonnes of regolith per hour, with material moving through the machine and being returned to the surface.
That figure describes a regolith-handling design rate, not helium-3 output. The quantity of usable isotope would depend on the feed material and the efficiency of the subsequent processing steps. Prototype work on Earth also has to be distinguished from sustained operation on the Moon.
Interlune identifies excavation, sorting, extraction, and separation as stages of its harvesting approach. The sequence illustrates why digging capacity cannot stand in for the performance of the complete system.
For example, a faster excavator would not necessarily increase product output if the extraction stage could not process the additional feed. Power, equipment reliability, and the interaction between stages would also affect the operation. The design has to work as a connected process.
What would make the next milestone useful?
The most informative progress would connect measurements with operating evidence: the composition of a sample, the conditions used to process it, the material recovered and the resources required to do so.
Those results could help developers move from a proposed resource towards equipment and delivery requirements. A future customer would ultimately need a product with an agreed specification, quantity and timetable. Establishing that chain starts with knowing what is in the ground and demonstrating how it can be recovered.
