Eventually, on a cosmic scale, atomic decay would release the confined energy and the energy would return to infinity, creating the appearance of a contracting universe that restarts the Big Bang.
If this idea is reality it would create a geodesically complete cosmology. In relative terms, the ratio of the age of the universe now, to 10 seconds is much much smaller than the ratio of 10 seconds to $10^$s.
As the universe cools, the matter content changes - new particles are formed out of the preexisting ones, such as protons and neutrons forming out of quarks.
From about one second to a few minutes cosmic time, when the temperature has fallen below 10 billion Kelvin, the conditions are just right for protons and neutrons to combine and form certain species of atomic nuclei. While the early universe is totally unlike our everyday world, the basic nuclear physics at the appropriate energies is well within the range of laboratory experiments.
Taking into account a wealth of nuclear reactions similar to the ones pictured above, one can then apply general statistical formula which govern the relative abundances of the different matter constituents.
What nuclei are produced, and in what amounts, is the result of a race between the various nuclear reactions on the one hand and the inevitable cooling that accompanies the expansion of the universe on the other.Check out this Astronomy Cast episode, tailor-made for this Guide to Space article: Nucleosynthesis: Elements from Stars.Definition of Nucleo Synthesis:- The procedure in which from old or existing atoms (mostly protons and neutrons) newer atoms are created out of them. In Short this was overall responsible for the formation or the starting of the Big Bang .During the subsequent expansion, this plasma has progressively cooled down.By examining how the cooling affects the matter content of the universe, one can derive one of the most impressive testable predictions of the big bang models.Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.Visit Stack Exchange Further thoughts: The metaphor for the expansion of the universe is often described as an inflating balloon, but could it be equally valid to think of expansion as matter falling into its own gravity well, away from infinity minus other matter within its gravity field.The nucleons that date back to the stage of the starting of the universe were made in the same procedure.This was when the Big Bang contained quark-glucon plasma which cooled the temperature below approximately 10 million degree Celsius.In astronomy – and astrophysics and cosmology – there are two main kinds of nucleosynthesis, Big Bang nucleosynthesis (BBN), and stellar nucleosynthesis.In the amazingly successful set of theories which are popularly called the Big Bang theory, the early universe was very dense, and very hot.