</ref>, or that there exists [[Hubble time dilation]] causing such an effect in stationary [[Einstein's universe]]. The latter effect is expected by observational predictions of [[Einsteinian gravitation]]. It also complies with the [[perfect cosmological principle]]. | </ref>, or that there exists [[Hubble time dilation]] causing such an effect in stationary [[Einstein's universe]]. The latter effect is expected by observational predictions of [[Einsteinian gravitation]]. It also complies with the [[perfect cosmological principle]]. |