Hubble's law

noun

Astronomy.

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

Hubble's law

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

Hubble's law

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

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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.

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Hubble’s law says the recession velocity of a galaxy is equal to its distance multiplied by a quantity called Hubble’s constant.

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To test Hubble’s law, astronomers need to measure distances to galaxies.

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If the theory is correct, everything in the visible universe should be younger than the expansion time computed from Hubble’s law.

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This relation, now known as Hubble’s law, is just what one would expect in a uniformly expanding universe.

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