Ich finde dass das Buch von Stephen Weinberg 'Die Ersten Drei Minuten" doch sehr lesenswert ist.
Hier ist ein Passus:
"The universe will go on expanding and cooling, but not much of interest will occur for 700,000 years. At that time the temperature will drop to the point where electrons and nuclei can form stable atoms; the lack of free electrons will make the contents of the universe transparent to radiation; and the decoupling of matter and radiation will allow matter to begin to form into galaxies and stars. After another 10,000 million years or so, living beings will begin to reconstruct this story.
This account of the early universe has one consequence that can be immediately tested against observation: the material left over from the first three minutes, out of which the stars must originally have formed, consisted of 22-28 per cent helium, with almost all the rest hydrogen. As we have seen, this result depends on the assumption that there is a huge ratio of photons to nuclear particles, which in turn is based on the measured 3° K temperature of the present cosmic microwave radiation background.
The first calculation for the cosmological helium production to make use of the measured radiation temperature was carried out by P. J. E. Peebles at Princeton in 1965, shortly after the discovery of the microwave background by Penzias and Wilson. A similar result was obtained independently and at almost the same time in a more elaborate calculation by Robert Wagoner, William Fowler and Fred Hoyle.
This result was a stunning success for the standard model, for there were already at this time independent estimates that the sun and other stars do start their lives as mostly hydrogen".
Steven Weinberg;The First Three Minutes; A modem view of the origin of the universe ; ppg 112
(meine Hrvhbg)
Das 'Standard Model' bzw. 'standard cosmological model' bezieht sich auf unser bisheriges Wissen * bzgl. des Werdegangs des Universums seit dem BB. Es ist also Quasi-Dogma.
* Aspekte des Wissens wurden in CERN und anderen Cyclotrons per Versuchsergebnissen in particle creation and annihilation bestaetigt,
Und noch eine andere Bestaetigung fuer die Richtigkeit des Standard Models , diesmal bzgl Nukleonsyntheis ( also die Herstellung von Atomen) die Dichtheitsverhaeltnissen von Helium und Deuterium ein Bruchteil einer sek. nach dem BB. Man bemerke dass in dem Chaos Elekronen dich nicht an Protonen binden konnten.
"For almost 30 years, the predictions of big-bang nucleosynthesis have been used to test the big-bang model to within a fraction of a second of the bang. The agreement between the predicted and observed abundances of deuterium, helium-3, helium-4, and lithium-7 confirms the standard cosmology model and allows accurate determination of the baryon density, between 1.7 X 1 0-31 and 4.1 X 1 OP3' grams per cubic centimeter (correspondingto about 1 to 15 percent of the critical density)."
(Big-Bang Nucleosynthesis and the Baryon Density of the Universe; Craig J. Copi, David N. Schramm, Michael S. Turner)
Ja , es ist ein 'Modell' , doch ein 'highly probable' Modell....