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Hubble parameter   /hˈəbəl pərˈæmətər/   Listen
Hubble parameter

noun
1.
(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 today.  Synonyms: Hubble's constant, Hubble's parameter, Hubble constant.






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