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cosmological principle

noun, Astronomy.
the hypothesis that the universe is isotropic and homogeneous on a large scale: used to simplify the equations of general relativity for models of the universe. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for cosmological-principle

cosmological principle

(astronomy) the theory that the universe is uniform, homogenous, and isotropic, and therefore appears the same from any position
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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