4
Although the deviation of the cosmic from the Newton time today amounts to only 1 millisecond per year, this has far reaching consequences for the history of the universe. Measured in its typical time ( cosmic time), the universe is infinitely old, and the big bang dissolves into the infinity of the past.The following deliberations are based upon axioms which today are accepted by the majority in science:
- Axiom 1: The speed of light is a universal natural constant
- Axiom 2: The laws of the GTR apply to the total universe
- Axiom 3: The universe spans out  a plane (Euclidean) space, in the average over large distances
- Axiom 4: The universe expands at the speed of light
Let me presume here, the „cosmic time“ is the result of solving the paradoxes arising from axioms 1 and 4, in context with the GTR. [9].
From the field equations of the GTR, Einstein had, for a plane expanding universe,( Einstein- de Sitter- universe) ( Fig. 2, world model III), deduced the relation [10]. p. 107 ff
        (2)
(k = coupling constant in the field equations of the GTR , r = average mass density of the universe,
h = H/c = 1/t H c = 1/R = Hubble expansion)
 
4