If the galaxies are as numerous as the molecules of a gas and behaves as a gas, the actual expansion of Universe is simply a local phenomenon that affects only our neighborhood of 3x10^10 light-years. In this region, by chance, the expansion is accelerated, in other regions can be a compression or a steady flux. For that, the Newton's Gravitation Constant is not such a universal constant because it mesures the volumetric acceleration of the local galaxies by unity of mass. Ludovicus
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