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Hubble's constant

DEFINITIONS OF: Hubble's constant

1

n (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 constant, Hubble parameter, Hubble's parameter
Type of:
constant
a number representing a quantity assumed to have a fixed value in a specified mathematical context
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