OriginsOfElements - ScienceGeek.net

OriginsOfElements - ScienceGeek.net

The Origins of Elements "The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pies were made in the interiors of collapsing stars. We are made of star stuff. Carl Sagan Our sun is a low mass, main sequence star. Throughout most of its life, a star produces helium from hydrogen fusion. Main Sequence refers to this hydrogen fusion stage of a stars life

Fusion reactions also produce enormous amounts of energy. Sol Our Sun http://www.popastro.com/solar/solarobserving/chapter.php?id_pag=30 The Hydrogen Fusion Reaction The helium producing reaction characteristic of main sequence stars, such as our sun. Commons.Wikimedia.Org/wiki/user:Borb

Life Cycle of Stars The Suns Future o The sun will not go supernova it is not large enough o Our sun will become a red giant in about 5 billion years o It will swallow Mercury, Venus and Earth Commons.Wikimedia.org/wiki/User:Mysid Nucleosynthesis in a Red

Giant Star The C-N-O Cycle 12 6 13 7 13 6 1 1 + 13 7 + +1.95

0 13 + 6 1 +1.20 + 11 147 + +7.54 14 7 1 1 + 15 8

15 7 15 8 + +7.35 0 15 + 7 1 +1.73 1 1 12

6 4 2 + + + 4 .96 The silicon-burning sequence in the core of a contracting massive star 28 14 + 42 32 16 32 16 + 42 36 18 36

18 40 20 + 42 40 20 + 42 44 22 44 22 + 42 48 24 48 24 52 26

+ 42 52 26 + 42 56 28 56 28 + 42 60 30 Nucleosynthesis Periodic Table Commons.Wikimedia.Org/wiki/user:Cmglee

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