Hubble's Constant Definition
hŭbəlz
noun
A ratio used in Hubble's law to express the rate of apparent expansion of the universe, equal to the velocity at which a typical galaxy is receding from Earth divided by its distance from Earth, approximately 71 kilometers per second per megaparsec.
American Heritage
(singular only) Alternative spelling of Hubble constant.
Wiktionary
Origin of Hubble's Constant
After Edwin Powell Hubble
From American Heritage Dictionary of the English Language, 5th Edition
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