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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

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Hubble constant

Currently, astronomers rely on two main approaches to measure the Hubble constant, but they do not agree with each other.

From Science Daily ● Apr. 29, 2026

Ideally, all these techniques would point to the same Hubble constant.

From Science Daily ● Mar. 1, 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

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

Ho has been known ever since as the Hubble constant and the whole as Hubble’s Law.

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