Hubble's law(redirected from Galactic drift)
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An empirical law of observational cosmology stating that the velocities at which galaxies in the universe recede from one another is directly proportional to the distances between them.
[After Edwin Powell Hubblewho first formulated it.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Astronomy) astronomy a law stating that the velocity of recession of a galaxy is proportional to its distance from the observer
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|Noun||1.||Hubble's law - (astronomy) the generalization that the speed of recession of distant galaxies (the red shift) is proportional to their distance from the observer|
law of nature, law - a generalization that describes recurring facts or events in nature; "the laws of thermodynamics"
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