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Regulus is a multiple star system consisting of at least four stars. Regulus A is the dominant star, with a binary companion 177" distant that is thought to be physically related. Regulus D is a 12th magnitude companion at 212", [33] but is an unrelated background object.
Alchemical symbols were used to denote chemical elements and compounds, as well as alchemical apparatus and processes, until the 18th century. Although notation was partly standardized, style and symbol varied between alchemists. Lüdy-Tenger [1] published an inventory of 3,695 symbols and variants, and that was not exhaustive, omitting for ...
In alchemy and philosophy, prima materia, materia prima or first matter (for a philosophical exposition refer to: Prime Matter ), is the ubiquitous starting material required for the alchemical magnum opus and the creation of the philosopher's stone. It is the primitive formless base of all matter similar to chaos, the quintessence or aether.
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Stellar nucleosynthesis. In astrophysics, stellar nucleosynthesis is the creation of chemical elements by nuclear fusion reactions within stars. Stellar nucleosynthesis has occurred since the original creation of hydrogen, helium and lithium during the Big Bang. As a predictive theory, it yields accurate estimates of the observed abundances of ...
Ouroboros. An ouroboros in a 1478 drawing in an alchemical tract [1] The ouroboros or uroboros ( / ˌjʊərəˈbɒrəs /; [2] / ˌʊərəˈbɒrəs / [3]) is an ancient symbol depicting a serpent or dragon [4] eating its own tail. The ouroboros entered Western tradition via ancient Egyptian iconography and the Greek magical tradition.
The use of astronomical symbols for the Sun and Moon dates to antiquity. The forms of the symbols that appear in the original papyrus texts of Greek horoscopes are a circle with one ray () for the Sun and a crescent for the Moon. [3] The modern Sun symbol, a circle with a dot (☉), first appeared in Europe in the Renaissance.
Nucleosynthesis. Diagram illustration the creation of new elements by the alpha process. Nucleosynthesis is the process that creates new atomic nuclei from pre-existing nucleons (protons and neutrons) and nuclei. According to current theories, the first nuclei were formed a few minutes after the Big Bang, through nuclear reactions in a process ...