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