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.