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Marty,
The idea came to me more than a decade ago when NASA flew a spacecraft with a gadget containing "aerogel" about the size of a tennis racket to sample the dust in the solar system, then it returned to earth.
The aerogel was silica, in an incredibly low density soft matrix, 99% empty space, to provide a soft landing for anything collected.
The regolith is a very fine powder and below a certain size microscopic particles just embed themselves in it without significant damage in much the same way. The challenge is sorting out which bits are "moon" and what isn't.
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