uploaded by kelly on Dec 19, 2007.

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Description: Of course the Hubble Law must still be fulfilled: it does follow from spatial homogeneity and isotropy. It could be said that the Perfect Principle is merely one particular case of the Generalized Copernican Principle, just as the Generalized one is merely one particular case of the Genuine Copernican Principle. The Perfect Principle puts more constraints on the models of the Universe.