warm-hot intergalactic medium English

Meaning warm-hot intergalactic medium meaning

What does warm-hot intergalactic medium mean?

warm-hot intergalactic medium noun

— (astronomy) 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 in the universe at the current epoch.