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Stars Life cycles and Nuclear Fusion Taylor Wilson.

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Presentation on theme: "Stars Life cycles and Nuclear Fusion Taylor Wilson."— Presentation transcript:

1 Stars Life cycles and Nuclear Fusion Taylor Wilson

2 How are they born? Stars born within nebulae – Orion Nebula Knots arise as dust particles collect – Collapse When nuclear fusion begins, a star is “born”

3 Nuclear Fusion Core is environment of extreme pressure and temperature – 15 million K Counteracts forces of gravitational attraction Fuses together lighter elements to create heavier ones at core Exothermic process Energy released in the form of gamma rays

4 More on Fusion Remember Newton’s 3 rd Law?... Deuterium and Tritium are both isotopes of hydrogen. Deuterium is stable while Tritium is slightly radioactive.

5 Maday! We’re out of hydrogen… Star leaves main sequence The most massive of stars can fuse other elements (helium-iron) when deprived of hydrogen Red giant  Next size determines the star’s fate

6 The Cycle Continues The mass lost by the star (supernova or shedding outermost layers), in turn gathers elsewhere in the universe to create new stars!

7 Bibliography Cain, Fraser. "Nuclear Fusion in Stars." Universe Today RSS. N.p., 12 Feb Web. 07 July Choi, Charles Q. "Stars: Formation, Classification and Constellations." Space.com. Purch, 15 Nov Web. 05 July "Stars - NASA Science." Stars - NASA Science. NASA, n.d. Web. 07 July 2014.


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