# Hubble constant

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Related to Hubble constant: parsec

## Hubble constant

*n*

(Astronomy) the rate at which the expansion velocity of the universe depends on distance away. It is currently estimated to lie in the range 60–80 km s

^{–1}megaparsec^{–1}. Also called:**Hubble parameter**ThesaurusAntonymsRelated WordsSynonyms

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Noun | 1. | Hubble constant - (cosmology) the ratio of the speed of recession of a galaxy (due to the expansion of the universe) to its distance from the observer; the Hubble constant is not actually a constant, but is regarded as measuring the expansion rate todaycosmogeny, cosmogony, cosmology - the branch of astrophysics that studies the origin and evolution and structure of the universe constant - a number representing a quantity assumed to have a fixed value in a specified mathematical context; "the velocity of light is a constant" |

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