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Supernova’s

Supernova’s. By Blake Sharin. Introduction. How are stars formed? How do stars die? Supernova’s Type I Supernova Type II Supernova Neutron Stars Black Holes. How are Stars Formed?. Compromise between two forces. Strong Nuclear Force Star expands Gravity

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Supernova’s

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  1. Supernova’s By Blake Sharin

  2. Introduction • How are stars formed? • How do stars die? • Supernova’s • Type I Supernova • Type II Supernova • Neutron Stars • Black Holes

  3. How are Stars Formed? • Compromise between two forces. • Strong Nuclear Force • Star expands • Gravity • Pressure generated from thermonuclear reactions • Star contracts • Interstellar Medium • Cloud of dust and gas (sometimes visible)

  4. How are Stars Formed? (contd.) • Stars form from the cold dark cloud of gas and dust in outer space. • Some sort of disturbance causes clumps of matter to form. • Blast wave. • Gravity pulls this matter together. • Core Rotates, heats up the center. • Protostar. • Energy into radiation and thermal energy which increases temp. • Temp finally reaches 10 million K • Thermonuclear reaction (Hydrogen atoms fuse).

  5. Columns of cool interstellar hydrogen gas and dust that are also incubators for new stars

  6. How do Stars Die? • Two types of stars • Stars like our sun • Run out of hydrogen • Temperature cools, leading to its collapse • Becomes Red Giant Star • Turns into a White Dwarf Star

  7. How do Stars Die? (contd.) • Massive Stars • 8 times the mass of the sun • Similar to the death of the Sun • Starts off with a blue white color • Expands, cools, turns yellow • Pulsates for few months • Turns into Red Supergiant Star • 1,000 larger than our Sun

  8. Death of a Massive Star (contd.) • While the sun can burn helium and hydrogen to keep the star shinning, massive stars attain temperatures so great that Iron is produced in the core. • Iron is the most stable nuclei. • It is at this point where the core collapses and the imploding material produces a shock wave. • Shock wave blows the star apart and produces a Supernova.

  9. Illustration of a Massive Stars Life Cycle

  10. Type I Supernova • Caused by the collapse of a White Dwarf Star. • White Dwarf Star exceeds 1.4 solar masses, star will collapse. • Leaves no remnants behind.

  11. Type II Supernova • Similar to Type I Supernova, but these will leave behind a black hole or a neutron star. • If the mass of the core is less than 2 or 3 solar masses, it becomes a neutron star. • If the mass of the core is more than 2 or 3 solar masses, it becomes a black hole.

  12. Supernova 1987A

  13. Black Holes • Region of spacetime from which nothing can escape, even light. • It is impossible to see a black hole directly because no light can escape from them; they are black. • Inside the core, the brown disk weighs 100,000 times the mass of the sun. • Gravity is 1 million times as strong as the sun.

  14. Conclusion • www.hubblesite.org • www.scri.fsu.edu

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