Seattle-based Interlune says it has managed to provide 99% pure helium-3 from an ordinary provide of industrial-grade helium, marking a milestone for a expertise that the corporate goals to make use of on the moon.
The method, generally known as Chilly Seize, could possibly be profitably used on Earth even earlier than Interlune begins lunar mining operations.
Solely 0.000137% of the world’s helium exists within the type of helium-3, versus the rather more widespread helium-4 isotope. However helium-3 is uniquely suited to use as a refrigerant for quantum computer systems. It will also be utilized in radiation detectors, medical scanners and finally fusion reactors.
Due to its rarity and utility, the worth of helium-3 can vary as excessive as $20 million per kilogram ($9 million per pound). Interlune is betting on the proposition that helium-3 is extra considerable and simpler to entry on the moon, as a result of lunar floor’s publicity to the photo voltaic wind. If Interlune’s enterprise mannequin works out, the corporate will be capable to flip a revenue by delivering lunar helium-3 to Earth for industrial purposes.
Interlune’s first goal was to point out that Chilly Seize may work as marketed. The method makes use of cryogenic distillation to separate helium-3 from bizarre helium at temperatures approaching absolute zero.
“Capturing helium-3 from present helium sounds deceptively easy,” Gary Lai, Interlune’s chief expertise officer, mentioned in a information launch. “However helium-3 and bizarre helium are nearly chemically similar, making them terribly tough to separate. Chilly Seize exploits refined bodily variations between the 2 isotopes at cryogenic temperatures to recuperate helium-3 in a course of designed to scale.”
Interlune demonstrated Chilly Seize at a small scale in early 2025, and obtained a $1.25 million small-business grant from the Division of the Air Pressure final November to scale up the expertise for industrial manufacturing.
Primarily based on the experiments carried out since then, Interlune tasks that its expertise may triple the present home manufacturing charge of helium-3.
“Each liter of helium produced on the earth comprises hint quantities of helium-3,” mentioned Rob Meyerson, co-founder and CEO of Interlune. “Chilly Seize plugs into present helium liquefaction plant infrastructure to recuperate that helium-3 and switch it right into a precious product.”
Interlune has already struck offers with the U.S. Division of Power and Maybell Quantum to ship shipments of helium-3. The primary shipments are prone to come from terrestrial sources of helium, courtesy of Chilly Seize.
In the meantime, the corporate is following a step-by-step plan for lunar prospecting and manufacturing. A digital camera designed to estimate lunar ranges of helium-3 is due for supply to the moon late this yr aboard Astrobotic’s Griffin-1 lander.
That mission, generally known as Crescent Moon, is anticipated to open the way in which for a NASA-supported experiment referred to as Prospect Moon in 2028. The experiment will take a look at strategies to extract gases resembling helium-3 and hydrogen from lunar soil and rocks.
Observe-up missions may deal with harvesting hydrogen for rocket gasoline and different lunar energy purposes, whereas additionally gathering helium-3 for supply to Earth.
Interlune was based in 2020 and reported elevating $18 million in seed capital in 2024. This January, the corporate introduced an extra $5 million funding providing geared toward advancing key technical milestones.
