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shadow matter comparison table |
Subject | has definition | is a kind of |
---|---|---|
hypothetical particle | particle | |
shadow matter | Theoretical classes of particles, their existence intimated by supersymmetry, theory, that participate in few if any of the four known fundamental forces. Planets, stars, and galaxies made of shadow matter could conceivably exist in the same space and time we occupy without our sensing their presence. | hypothetical particle |
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