If I have done the arithmetic correctly, a Hubble constant of 72 kilometers per second per kiloparsec converts to 2.3 * 10e-19 meters/sec/meter (a tenth of a billionth of a billionth) for the current rate of expansion. Since there are 4.4e+17 seconds in 14 billion years, the cumulative expansion since the big bang is 10 centimeters/meter assuming that the current measured rate is accurate and valid. Recent measurements lead some observers to believe that the expansion rate is increasing i.e., not constant. It would not be much of a stretch to assume that the Hubble constant has always been a variable and that, due to the much greater density in the early universe and the time dilation attendant thereto, the Hubble coefficient may well have been much less than unity giving the universe a much greater age. Has anyone seen an analysis of how the enormous gravitational field strength present when the universe was 10e-30 seconds old was overcome to not only prevent a black hole type collapse but also to supply the kinetic energy associated with continuing expansion and what the time dilation characteristics of this period were?
There seems to be no evidence for expansion at small scales. At what scale does this expansion characteristic vanish? Local Group, Milky Way, solar system, earth, me, hydrogen, neutron, quark, neutrino, smaller ? :unsure: :unsure: