Hubble's Constant

Of cosmology and constant.   May also be referred to as Hubble constant, Hubble parameter and Hubble's parameter.

(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.

This concept's ID is @1~68107