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The moon already has a whole lot of helium 3 that'd be economically viable right now, if there were a use for it yet.
by caymanjim 5y ago
The moon already has a whole lot of helium 3 that'd be economically viable right now, if there were a use for it yet.
- pfdietz 5y agoThe moon has 3He, at a concentration of maybe 10ppb, in regolith the heating of which would use more energy than the released 3He would yield in fusion. Helium at cosmic isotope ratios is 120ppm 3He. So if there were a planet out there with an atmosphere of this helium, extracting the 3He would be much easier (just compress, liquefy and separate, which you'd have to do with lunar helium anyway.)