University of Phoenix SCI350: The Life Cycle of Star

Feb 3rd, 2012
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University of Phoenix
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An average galaxy is thought to contain over a hundred billion stars. A hundred billion galaxies are thought to exist in the universe. That adds up to a lot of stars. Where do these stars come from? How do they form?

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IntroductionAn average galaxy is thought to contain over a hundred billion stars. A hundred billion galaxies are thought to exist in the universe. That adds up to a lot of stars. Where do these stars come from? How do they form? Why are some stars brighter than others? How does the sun get and generate power? One of the great discoveries of modern science is that stars live only for a measurable amount of time and then die? Although the lives of the stars are enormously longer than a human lifetime, we can learn about the life story of stars by studying them at every stage and putting all the pieces together. We are going piece together the star's early beginnings; the formation of a star, it's birth, its energy and its life as a main sequence star. We will also distinguish between a low mass star and a high mass star and the significance of both. Each area will enrich our understanding and give us a clearer picture of how a star is born and its place in the universe.Image courtesy of NASAGiant Molecular CloudsOur universe is filled with clouds of gas and dust amid the black emptiness of space. These leftovers from the formations of our galaxies can have a diameter as big

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