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Stars And Galaxies


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star and galaxies

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Stars And Galaxies

  1. 1. Nolan and Eric
  2. 2. <ul><li>A giant luminous ball of plasma held together by gravity. </li></ul>
  3. 3. <ul><li>The first stage of a star is a nebula. </li></ul><ul><li>A nebula is where stars forms in a dusty molecular clouds. </li></ul>
  4. 5. <ul><li>The next life stage of a star is a Proto star. </li></ul><ul><li>A Proto star is the birth of a star. </li></ul>
  5. 6. <ul><li>The next stage of a star life stage is main sequence star or a massive star. </li></ul><ul><li>A main sequence star is our typical sun. </li></ul><ul><li>A massive star is a star that is made out of heavier gas </li></ul><ul><li>A massive star is about 50,000K </li></ul><ul><li>A regular star is around a few K. </li></ul><ul><li>K stands for Kelvin, a measurement of heat that starts at Absolute zero. </li></ul>
  6. 7. <ul><li>After about 1-10billion years a main sequence star will turn into a red giant. </li></ul><ul><li>And a massive star will turn into a red supergiant. </li></ul><ul><li>They turn into these stars because they expand when they exhaust their hydrogen and change to helium. </li></ul>
  7. 8. <ul><li>When a star dies a red giant will turn into a planetary nebula </li></ul><ul><li>And a red supergiant will turn in a supernova which will explode. </li></ul>
  8. 9. <ul><li>After the stars die the planetary nebula will turn into a white dwarf. </li></ul><ul><li>After a supernova explosion the star will either become a neutron star or if the supernova collapse it will become a black hole. </li></ul><ul><li>Then after a white dwarf there is a black dwarf which is a dead sun. </li></ul>
  9. 11. <ul><li>1.The star gets smaller or bigger in size </li></ul><ul><li>2. Nuclear fusion will turn the hydrogen turns into helium </li></ul><ul><li>It will expand to become a red super giant depending on what star it is. </li></ul>
  10. 12. <ul><li>At every center of a galaxy there is a super massive mass black hole. </li></ul><ul><li>There is a spiral galaxies </li></ul><ul><li>There is an elliptical </li></ul><ul><li>There is an irregular </li></ul><ul><li>And there are m orphologies </li></ul>
  11. 13. <ul><li>Spiral Galaxies consists of rotating disk of stars. </li></ul><ul><li>They look like spirals. </li></ul><ul><li>They usually have a bright bulge at the center. </li></ul>The Milky way galaxy>>>
  12. 14. <ul><li>They have an elliptical shape. </li></ul><ul><li>There are a cluster of suns and planets that makes up the elliptical shape. </li></ul><ul><li>M87 is below </li></ul>
  13. 15. <ul><li>They do not have a regular shape like the elliptical and spiral galaxies. </li></ul><ul><li>Irregular galaxies were once spiral or elliptical galaxies but were deformed by gravitational action. </li></ul>
  14. 16. <ul><li>Morphologies galaxies have unusual formation </li></ul>
  15. 17. <ul><li>The difference between apparent magnitude and absolute magnitude is that apparent magnitude is a what a star looks from earth and how bright it is and absolute is how bright a star really is. </li></ul>
  16. 18. <ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li>Eric B. </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul>