The oxygen burning process is a nuclear fusion reaction that occurs in massive stars that have used up the lighter elements in their cores. It occurs at 1.5×10⁹K and densities of 10¹⁰kg/m³. In physics, nuclear fusion (a thermonuclear reaction) is a process in which two nuclei join, forming a larger nucleus and releasing energy. ... For alternate meanings see star (disambiguation) Hundreds of stars are visible in this image taken by the Hubble Space Telescope of the Sagittarius Star Cloud in the Milky Way Galaxy. ... The kelvin (symbol: K) is the SI unit of temperature, and is one of the seven SI base units. ...

With the neon burning process an inert core of O-Mg forms in the centre of the star. As the neon burning turns off, the core contracts and heats up to the ignition point for the oxygen burning. In about six months to one year the star consumes its oxygen, accumulating a new core rich in silicon. This core is inert because is not hot enough. Once oxygen is exhausted, the core cools and contracts. This contraction heats it up to the point that silicon burning process ignites. Proceeding outward, there are a oxygen burning shell, followed by the neon shell, the carbon shell, the helium shell and the hydrogen shell. General Name, Symbol, Number Oxygen, O, 8 Chemical series nonmetals Group, Period, Block 16 (VIA), 2, p Density, Hardness 1. ... General Name, Symbol, Number sulfur, S, 16 Chemical series nonmetals Group, Period, Block 16 (VIA), 3 , p Density, Hardness 1960 kg/m3, 2 Appearance Lemon yellow at STP Atomic properties Atomic weight 32. ... This article is about electromagnetic radiation. ... General Name, Symbol, Number sulfur, S, 16 Chemical series nonmetals Group, Period, Block 16 (VIA), 3 , p Density, Hardness 1960 kg/m3, 2 Appearance Lemon yellow at STP Atomic properties Atomic weight 32. ... Properties In physics, the neutron is a subatomic particle with no net electric charge and a mass of 940 MeV/c² (1. ... This article is about the chemical element. ... General Name, Symbol, Number Hydrogen, H, 1 Chemical series nonmetals Group, Period, Block 1 (IA), 1 , s Density, Hardness 0. ... General Name, Symbol, Number silicon, Si, 14 Series metalloid Group, Period, Block 14 (IVA), 3, p Density, Hardness 2330 kg/m3, 6. ... General Name, Symbol, Number Helium, He, 2 Atomic weight 4. ... General Name, Symbol, Number magnesium, Mg, 12 Series alkaline earth metals Group, Period, Block 2 (IIA), 3, s Density, Hardness 1738 kg/m³, 2. ... General Name, Symbol, Number Helium, He, 2 Atomic weight 4. ... Neon burning process is a set of nuclear fusion reactions that take place in massive stars (at least 8 MSun). ... In astrophysics, silicon burning is a nuclear fusion reaction which occurs in massive stars. ...