Define Nucleosynthesis

Define Nucleosynthesis-63
Yet, hydrogen and helium together won't make anything as complex and as interesting as the Earth, or a bacterium, or a refrigerator, or you and I.To do that we need carbon and oxygen and nitrogen and silicon and chlorine and every other naturally occurring element.Big Bang nucleosynthesis produced no elements heavier than lithium.

Yet, hydrogen and helium together won't make anything as complex and as interesting as the Earth, or a bacterium, or a refrigerator, or you and I.To do that we need carbon and oxygen and nitrogen and silicon and chlorine and every other naturally occurring element.Big Bang nucleosynthesis produced no elements heavier than lithium.

(This alternative theory was called a steady state theory and fell out of favor when the cosmic microwave background radiation was detected.) The simplest type of atom in the universe is a hydrogen atom, which contains a single proton in the nucleus (possibly with some neutrons hanging out, as well) with electrons circling that nucleus.

These protons are now believed to have formed when the incredibly high energy of the very early universe lost enough energy that quarks began bonding together to form protons (and other hadrons, like neutrons).

with a sprinkling of deuterium, a dash of helium-3, and a trace of lithium-7. The atoms in your body – apart from the hydrogen – were all made in stars … Stars on the main sequence get the energy they shine by from nuclear reactions in their cores; off the main sequence, the energy comes from nuclear reactions in a shell (or more than one shell) around the core.

There are several different nuclear reaction cycles, or processes (e.g.

Heavier elements are created in different types of stars as they die or explode.

The idea that stars fuse together the atoms of light elements was first proposed in the 1920s, by Einstein's strong supporter Arthur Eddington.

the unstable isotopes left then decayed, as did the neutrons not already in some nucleus or other.

Most matter was then hydrogen (actually just protons; the electrons were not captured to form atoms until much later), and helium-4 (alpha particles) …

All of the atoms in the universe began as hydrogen.

Fusion inside stars transforms hydrogen into helium, heat, and radiation.

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