Hubble's law

American  

noun

Astronomy.

1. the law that the velocity of recession of distant galaxies from our own is proportional to their distance from us.

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Hubble's law British  

noun

1. astronomy a law stating that the velocity of recession of a galaxy is proportional to its distance from the observer

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Hubble's law Scientific  

/ hŭb′əlz /

1. A law of cosmology stating that the rate at which astronomical objects in the universe move apart from each other is proportional to their distance from each other. Current estimates of the value of this proportion, known as Hubble's constant, put its value at approximately 71 kilometers per second per megaparsec.

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Etymology

Origin of Hubble's law

First recorded in 1930–35; named after E. P. Hubble, discoverer of the relationship

Example Sentences

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Hubble's law

Pythagoras wasn’t the first person to derive the Pythagorean theorem, Edwin Hubble wasn’t the first to formulate Hubble’s law, and so on.

From Scientific American ● Apr. 2, 2020

Why is Hubble’s law considered one of the most important discoveries in the history of astronomy?

From Textbooks ● Oct. 13, 2016

This equation is now known as Hubble’s law.

From Textbooks ● Oct. 13, 2016

The relationship between the velocity of recession of galaxies and their distance from Earth that we call Hubble's law was first formulated by Belgian cosmologist Georges Lemaître.

From Nature ● Mar. 22, 2012

By Hubble's law it appeared to be some 4 billion light-years away.

From Time Magazine Archive