: Astronomía: Hubble constant

cosmology > fundamental constant > astronomical constant > Hubble constant

Hubble constant

The Hubble constant (H₀) is a measure of the present expansion rate of the universe, in units of kilometers per second per megaparsec (km/s/Mpc). It relates the apparent recession velocity of a galaxy, or galaxy cluster, to its distance from the Milky Way. The larger the Hubble constant, the younger the universe. (Encyclopedia of Science, by David Darling, https://www.daviddarling.info/encyclopedia/H/Hubble_constant.html)

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