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Life Cycle of the Stars

Life Cycle of the Stars. By Aiyana and Meredith. http://techcenter.davidson.k12.nc.us/spring026/images/OuterSpace.jpg. Nebula. A nebula is made of gas and dust T he nebula is the birth place of a star They g et their light from nearby stars.

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Life Cycle of the Stars

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  1. Life Cycle of the Stars By Aiyana and Meredith http://techcenter.davidson.k12.nc.us/spring026/images/OuterSpace.jpg

  2. Nebula • A nebula is made of gas and dust • The nebula is the birth place of a star • They get their light from nearby stars. http://www.windowsmoviemakers.net/PapaJohn/117/Blue-Screen_Outer_Space_Clips_files/image004.jpg http://sunshine.chpc.uh.edu/labs/star_life/starlife_main.htmlta

  3. Protostar“Fetus” • The protostar is the first stage of a star’s life • Formed when gravity clumps the hydrogen and helium of a nebula together • In order to grow in life it needs to maintain equilibrium • Balance between gravity pulling atoms towards center and gas pushing heat and light away form center http://sunshine.chpc.utah.edu/labs/star_life/starlife_proto.html

  4. Main Sequence“Adulthood” • Phase in which stars live out the majority of their lives • Stars last in main sequence for billions of years • During entire life the star battles gravity, trying to crush it • http://spaceflightnow.com/news/n0009/15supernova/supernova.jpg http://www.presentationstation.com/Backgrounds/Miscellaneous_2/orange_spot.jpg

  5. Red Giant“Middle Age” • During this short phase the star starts cooling and the fusion fuel starts going away • Core shrinks but fusion keeps on going • When our sun reaches the phase of a red giant its diameter will expand to the size of the orbit of Mars http://sunshine.chpc.utah.edu/labs/star_life/support/red_giant.html http://www.awesomebackgrounds.com/templates/fire-on.JPG

  6. http://www.freestockfootage.com/Thumbs/t600-100-023.jpg White Dwarf/Black Hole“Old Age” • When a star runs out of fuel to burn, gravity collapses it in • Low mass stars, who have electrons that prevent the collapse of the core, shrink to a white dwarf • When crushed by gravity high mass stars totally leave space become a black hole White Dwarf Black Hole http://spaceflightnow.com/news/n0005/22astronext10/000522blackhole.jpg http://www.vgaplanets.com/v4doc/PLAN0020.gif

  7. Brown Dwarf • Star like objects in space that have masses less than .08 times that of the sun • Unable to sustain hydrogen fusion • Brown dwarf is a protostar that didn’t have enough dust and gas to achieve a temperature hot enough to ignite fusion Arrow is pointing at a Brown Dwarf http://www.universetoday.com/html/pictures/big2002-0109a.jpg

  8. Planetary Nebula“After Life” • After explosion the core remains extremely hot which emits high energetic radiation • When a star explodes a large cloud of gas is expelled called a Planetary Nebula • The first planetary nebula ever seenwas the Dumbbell Nebula M27 • One of the largest planetary Nebulae is NGC246 http://www.ask.com/bar?q=planetry+nebula&page=1&adt=0&qsrc=2417&ab=0&title=Planetary Nebula&u=http%3A%2F%2Fschmidling.com%2Fplanebs.htm

  9. http://www.awesomebackgrounds.com/ss-explosion.htm Helium fusion • Nuclear fusion with the nuclei being involved with helium. • Powered by fusing the element hydrogen into the element helium. • When stars exhaust their hydrogen fuel and build up a lot of helium, they begin to fuse helium together to form carbon. http://www.oufusion.org.uk/newsspring05/helium2carbon.jpg

  10. Hydrogen Fusion • Four hydrogen nuclei come together to make a nucleus. • There are electrons, neutrinos, and photons involved in making fusion of hydrogen into helium. • This fusion cycle generates energy in our Sun. http://www.physics.uiowa.edu/~umallik/adventure/spangle/spangle_files/image018.gif

  11. Neutron Star • Neutron stars are objects created in the cores of massive stars. • The core of a star collapses and crushes together every proton combined with electrons. • Neutrons can stop the collapse and remain as neutron stars.

  12. http://chandra.harvard.edu/photo/2004/rxj1242/rxj1242_still3.jpghttp://chandra.harvard.edu/photo/2004/rxj1242/rxj1242_still3.jpg Supernova • Most energetic explosion. • Occur at the end of a star’s life, when nuclear fuel is exhausted and can no longer be supported by the nuclear energy. • When the explosion occurs, the brightness can be as that of many millions of stars. http://www.ask.com/bar?q=supernova+information&page=1&adt=0&qsrc=2417&ab=3&title=Supernovae&u=http%3A%2F%2Fimagine.gsfc.nasa.gov%2Fdocs%2Fscience%2Fknow_l2%2Fsupernovae.html

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