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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 texp = 7.37 x 109 years for the universe. Hereby the observable red shift is limited to zmax = 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 RS = 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 rmax = 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 rA. - 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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copyright by Steffen Haase, Leipzig, 1998 and 1999

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