: Astronomie: cold dark matter

high-energy astrophysics > dark matter > cold dark matter

intergalactic space > intergalactic matter > dark matter > cold dark matter

cold dark matter

In cosmology and physics, cold dark matter (CDM) is a hypothetical type of dark matter. According to the current standard model of cosmology, Lambda-CDM model, approximately 27% of the universe is dark matter and 68% is dark energy, with only a small fraction being the ordinary baryonic matter that composes stars, planets, and living organisms. Cold refers to the fact that the dark matter moves slowly compared to the speed of light, while dark indicates that it interacts very weakly with ordinary matter and electromagnetic radiation. Proposed candidates for CDM include weakly interacting massive particles, primordial black holes, and axions. (Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Cold_dark_matter)

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