Dark Matter — definition

1. dark matter (Noun)

1 definition

dark matter (Noun) — (cosmology) a hypothetical form of matter that is believed to make up 90 percent of the universe; it is invisible (does not absorb or emit light) and does not collide with atomic particles but exerts gravitational force.

1 type of
matter
2 parts
WIMP weakly interacting massive particle
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