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

Together, these improvements help us measure the Hubble constant more precisely than ever before using gravitational waves, bringing us closer to understanding one of modern physics' most important open questions.

From Science Daily ● Jul. 2, 2026

Their findings, published on April 10 in Astronomy & Astrophysics, place the Hubble constant at 73.50 ± 0.81 kilometers per second per megaparsec, achieving a precision slightly better than 1%.

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

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

From Science Daily ● Mar. 1, 2026

Almost the only thing constant about the Hubble constant has been the amount of disagreement over what value to give it.

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