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Hubble constant

British

noun

Also called: Hubble parameter. the rate at which the expansion velocity of the universe depends on distance away. It is currently estimated to lie in the range 60–80 km s ^–1 megaparsec ^–1

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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This research is presented in a paper titled "The Local Distance Network: A community consensus report on the measurement of the Hubble constant at ∼1% precision" to published in Astronomy & Astrophysics.

From Science Daily • Apr. 12, 2026

When they combined the stochastic siren method with existing measurements from individual black hole mergers, they achieved a more precise estimate of the Hubble constant.

From Science Daily • Mar. 1, 2026

The value of 73 km/s/Mpc for the Hubble constant agrees with observations of relatively nearby objects.

From Science Daily • Dec. 9, 2025

Scientists have developed several methods to estimate the Hubble constant, but until now they have all relied on so-called distance ladders.

From Science Daily • Dec. 9, 2025

Sandage, after years of careful calculations, arrived at a value for the Hubble constant of 50, giving the universe an age of 20 billion years.

From "A Short History of Nearly Everything" by Bill Bryson

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023