The creation of new elements in stars by combining lighter nuclei to make heavier nuclei. More about nucleosynthesis...
The chemical reaction by which atomic nuclei (of any chemical element) are created. Nucleosynthesis took place when the Universe was very young. Today it takes place, for instance, in the stars' cores: the hydrogen, the most abundant component of a star, is converted into helium (this is referred to as helium nucleosynthesis) a process by which a huge amount of energy is released. This is the energy that allows the star to keep shining. When the hydrogen is used up then the star begins to transform the helium into other elements, and so on. The elements are hence used as fuel for the star, and the kind of element used in each stage of the star's life is an indication of how long it has been shining. Therefore, the chemical components of a star can provide a lot of information about its history. See also Primordial nucleosynthesis.
The production of new elements via nuclear reactions. Nucleosynthesis takes place in stars. It also took place soon after the Big Bang.
The formation of the elements.
Formation of atomic nuclei by nuclear reactions either in the Big Bang or in stellar interiors. Hydrogen, Deuterium, Helium and Lithium are made early on in the Big Bang. Heavier elements (eg. Carbon, Nitrogen, Oxygen) are produced in stellar interiors.
The building up of heavy elements from lighter ones by nuclear fusion.
(astronomy) the cosmic synthesis of atoms more complex than the hydrogen atom
the formation of heavy elements by such nuclear burning processes.
Nucleosynthesis is the production of nuclei from lighter nuclei. Big bang nucleosynthesis in the first few minutes of the Universe formed deuterium, helium and traces of lithium nuclei from fusion of protons (hyrdrogen nuclei). Stellar nucleosynthesis takes place in stars and is reponsible for production of elements heavier than helium including carbon, oxygen and iron. It also Very heavy nuclei are formed in the late evolutionary stages of more massive stars including the final supernova explosion.
When 2 atoms get squeezed and heated so much that their nuclei (the central part of an atom) get fused together, making one larger and heavier nucleus. When this happens a very large amount of energy is released as heat and light. Our Sun has a very large amount of pressure and heat at it's core, which is why it is constantly fusing the simple atoms of an element called Hydrogen into a slightly larger, more massive element called Helium. Each second, inside the Sun, 600 million tons of hydrogen are converted into 596 million tons of helium. We can think of the Sun as a factory that makes (or "synthesizes") Helium from the nuclei of Hydrogen atoms. Every day we feel and see the heat and light that is released by the nucleosynthesis that is going on inside of our our Sun
The production of elements heavier than hydrogen.
The chain of thermonuclear fusion processes by which hydrogen is converted to helium, helium to carbon, and so on through all the elements of the periodic table.
The process of forming elements from protons and neutrons.
Nucleosynthesis is the process of creating new atomic nuclei from preexisting nucleons (protons and neutrons). The primordial preexisting nucleons were formed from the quark-gluon plasma of the Big Bang as it cooled below ten million degrees. This first process may be called nucleogenesis, the genesis of nucleons in the universe.