I wrote:

There is some debate about how much of these precious metals are available elsewhere in the solar system, but I do not think this matters much. Once you leave the Earth's atmosphere and go to the moon or an asteroid, you can then use raw solar energy to vaporize as much low-grade or as you like . . .

I meant "low-grade ore." Regarding the prospects for prospecting the solar system, see this interesting web site:

http://www.permanent.com/intro.htm

This web site is kind of unorganized. For lunar materials, see:

http://www.permanent.com/l-overvw.htm

Not many metal ores there, at least on the surface. Maybe asteroids or Mars would be a better choice.

- Jed

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