Meaning | (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. |
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Synonyms | Hubble's constant, Hubble constant, Hubble's parameter |
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Category | cosmology, cosmogony, cosmogeny | The branch of astrophysics that studies the origin and evolution and structure of the universe |
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Broader | constant | A number representing a quantity assumed to have a fixed value in a specified mathematical context |
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Catalan | constant de Hubble |
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