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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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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 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

"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

Different methods produce conflicting values for the Hubble constant, the number used to describe how fast the universe is expanding.

From Science Daily Mar. 16, 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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