The Retarded Core Hypothesis

Abstract

In most ways, the hot big bang model of the universe is a good explanation of what we see around us. But if the Universe began from initially homogeneous and isotropic conditions, galaxies could not have formed in the time available. There is no reason why we should expect the initial condition of the Universe to have been one of perfect homogeneity and isotropy; it is quite permissible to postulate that the inhomogeneities which have given rise to the galaxies we see today were present at the very earliest stage of the exploding Universe. The latest discussion of this possibility is provided by Zel’dovich and Novikov (1974), and the problem is also mentioned by Misner, Thorne and Wheeler (1973).