The Universe is dynamic, not steady-state. There is no expansion of space with time.
Space is constant, it is time itself that changes with time.
This variation in the rate of time results in the Hubble red-shift vs. distance relation. By invoking a Generalized Mach Principle, a gravitationally bound Universe is thermalized. This view implies an interrelation of fundamental constants which provides some vindication of Dirac's Large Number Hypothesis. To break the matter-antimatter symmetry, white holes would decay further into matter and high energy photons. Star burst clusters decay further into globular clusters, while QSOs form elliptical galaxies.