HUBBLE'S CONSTANT

Pronunciation (US):

(GB):

 I. (noun) 

Sense 1

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

Synonyms:

Hubble's constant; Hubble's parameter; Hubble constant; Hubble parameter

Classified under:

Nouns denoting quantities and units of measure

Hypernyms ("Hubble's constant" is a kind of...):

constant (a number representing a quantity assumed to have a fixed value in a specified mathematical context)

Domain category:

cosmogeny; cosmogony; cosmology (the branch of astrophysics that studies the origin and evolution and structure of the universe)

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