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Hubble constant

British  

noun

  1. 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

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This effectively alters the cosmic ruler used to measure distances and, in turn, the value of the Hubble constant inferred from the model, helping to ease the Hubble tension.

From Science Daily ● Oct. 4, 2026

By carefully measuring these delays, scientists can calculate the current expansion rate of the universe, known as the Hubble constant.

From Science Daily ● Apr. 29, 2026

"This isn't just a new value of the Hubble constant," the collaboration notes, "it's a community-built framework that brings decades of independent distance measurements together, transparently and accessibly."

From Science Daily ● Apr. 12, 2026

The team showed that if the Hubble constant were lower, the total observable volume of the universe would also be smaller.

From Science Daily ● Mar. 1, 2026

De Vaucouleurs was equally certain that the Hubble constant was 100.*

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

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