Hubble constant

noun Hub·ble constant \¦həbəl-\

Definition of Hubble constant

  1. :  a proportionality constant indicative of the rate of expansion of the universe that is used in relating the apparent velocity of recession of a distant galaxy and its distance

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Origin and Etymology of hubble constant

after Edwin P. Hubble †1953 American astronomer

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a trip made at another's expense

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