Webster's Online Dictionary
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Definition: Hubble's constant

Part of SpeechDefinition
Noun1. (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.[Wordnet].

Source: WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.

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Common Expressions: Hubble's constant

ExpressionsDefinition
Hubble's 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 today. Source: Wordnet 3.0 Copyright © 2006 by Princeton University. All rights reserved.

Source: compiled by the editor from various references; see credits.

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