'Hubble's parameter' definitions:

Definition of 'Hubble's parameter'

(from WordNet)
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 [syn: Hubble's constant, Hubble constant, Hubble's parameter, Hubble parameter]

Words containing 'Hubble's parameter'