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| WHIM (The warm–hot intergalactic medium (WHIM) refers to a sparse, warm-to-hot (105 to 107 K) plasma that cosmologists believe to exist in the spaces between galaxies and to contain 40–50% of the baryons (that is, "normal matter" which exists as plasma or as atoms and molecules, in contrast to dark matter) in the universe at the current epoch. Miyer) | |||