cosmological principle
Noun
Meaning
English Wikipedia has an article on:Cosmological PrincipleWikipedia
cosmological principle
(astronomy) The assumption that the universe, on a large enough scale, is homogeneous and isotropic.
Examples
Peacock (1999), chapter 3 That space is undergoing metric expansion is shown by direct observational evidence of the Cosmological principle and the Copernican principle, which together with Hubble's law have no other explanation.
Modern mathematical cosmology is based on the assumption that the Cosmological principle is almost, but not exactly, true on the largest scales.