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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

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

To determine how fast it is growing today, scientists calculate a value called the 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

In their latest work, Yunes, Cousins, and their colleagues describe a new way to estimate the Hubble constant by studying black hole collisions that current detectors cannot individually pick up.

From Science Daily ● Mar. 1, 2026

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