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Meteors, Asteroids and Comets
Stardust impact tracks and light gas gun impacts of sulfide in aerogel both display
metal beads with sulfide rims indicating that GEMS-like objects in Stardust are
generated by impact mixing of comet dust with silica aerogel. (left) Stardust
GEMS-like material and (right) light gas gun shot GEM-like material. GEMS in
cometary IDPs do not contain sulfide-rimmed metal inclusions.
Credit: Hope Ishii, LLNL


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