parvaz-e keyhânšenâsik, ~ keyhânšenâxti
Fr.: principe cosmologique
The → hypothesis that on → large scales the → Universe is → isotropic and → homogeneous, that is, it appears the same at all places and, from any one place, looks the same in all directions. See also → perfect cosmological principle.
perfect cosmological principle
parvaz-e keyhânšenâsik-e farsâxt
Fr.: principe cosmologique parfait
The → assumption, adopted by the → steady-state theory, that all observers, everywhere at all times, would view the same large-scale distribution of matter in the → Universe in all regions and in every direction. In contrast to the → cosmological principle, the perfect cosmological principle adds the assumption that the Universe does not change with time on the large scale.