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Abstract:

Some supplementations to already published parts of this essay are given. In particular we again deal with differences between the Hubble relation derived in part I and the Hubble relationship which can be found in the literature. The assumption that cosmic objects with rest mass cannot move faster than at speed of light, gives a today's maximum possible expansion time of t_exp = 7.37 x 10⁹ years for the universe. Hereby the observable red shift is limited to z_max = 1.25. Therefore the mean red shift is < z > = 0.418. At the beginning of the expansion the radius of the universe was equal to the Schwarzschild radius R_S = 1424 Mpc. The present velocity of expansion of the universe amounts to 2/3 of the speed of light. The maximum density of the universe r_max = 8.32 x 10^-29 g cm^-3 at the time of the beginning of the expansion was only 11,4 times the present ascertainable density r_A. - Simple equations for the looking back time as function of the red shift and the apparent brightness, respectively, are given.

Key words: cosmology, Hubble relation, lock back time, red shift, Hubble time, expansion rate

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last update: 12/23/2000
last correction of spelling mistakes: 05/13/2005