Definitions for hubble constant
Hubble's constant, Hubble constant, Hubble's parameter, Hubble parameter(noun)
(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
a number the expresses the rate of expansion of the universe; the velocity at which a distant object is receding from the Earth divided by its distance; its reciprocal gives the age of the universe
Origin: After Edwin Powell Hubble, American astronomer
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