What is formed by nucleosynthesis
To do that you need stars, which means waiting around for at least billion years.
Thus, the limit to our observable Universe is back in time outward in space to the moment of recombination. Matter, on the other hand, is free to interact without being jousted by photons.
Its harder and harder to make nuclei with higher masses. Stars like the sun Details were discussed in the section on Fusion.
The goal of the theory of nucleosynthesis is to explain the vastly differing abundances of the chemical elements and their several isotopes from the perspective of natural processes.
The primary stimulus to the development of this theory was the shape of a plot of the abundances versus the atomic number of the elements. Elements beyond iron are made in large stars with slow neutron capture s-process.
Nucleosynthesis periodic table
For instance, fusing carbon requires a temperature of about one billion degrees! However, much of the Universe is in the form of dark matter, which brings the value of M to 0. A very influential stimulus to nucleosynthesis research was an abundance table created by Hans Suess and Harold Urey that was based on the unfractionated abundances of the non-volatile elements found within unevolved meteorites. Our Sun is currently burning, or fusing, hydrogen to helium. Star formation has occurred continuously in galaxies since that time. The s-process happens in the inert carbon core of a star, the slow capture of neutrons. To do that you need stars, which means waiting around for at least billion years. Today, radiation in the form of photons have a very passive role in the evolution of the Universe. In stars less massive than the Sun, this is the only reaction that takes place.
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