Black holes

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Black holes

  1. 1. BlackHoles
  2. 2. Black HolesThe intensegravitational field leftwhen a giant starcollapses
  3. 3. It is called a blackhole because noteven light canescape
  4. 4. Photon SphereThe outer edgewhere light bends butis still escapable
  5. 5. Event HorizonThe point at which nolight can escape
  6. 6. SingularityThe shrunken startoo small to bemeasured but withindefinite density
  7. 7. Galaxies
  8. 8. GalaxyA large assembly ofstars and nebulae
  9. 9. Group of Galaxies
  10. 10. The Milky WayOur galaxyFlat disk with spiralarms
  11. 11. Three Types of Galaxies
  12. 12. EllipticalOval shapedMost common typeof galaxy found
  13. 13. Contains little gasand dustMost are dim anddifficult to see
  14. 14. SpiralDense center withspiral armsBright and easy tosee
  15. 15. Contains largeamounts of gas anddust – alwaysproducing new stars
  16. 16. IrregularNo specific shapeContains largeamounts of gas anddust
  17. 17. Small and fainttherefore hard to see
  18. 18. Quasars
  19. 19. QuasarsSmall, powerfulsource of energythought to be coresof distant spiralgalaxies
  20. 20. They emit radiowaves and brightlight
  21. 21. This powerpoint was kindly donated towww.worldofteaching.comhttp://www.worldofteaching.com is home to over athousand powerpoints submitted by teachers. This is acompletely free site and requires no registration. Pleasevisit and I hope it will help in your teaching.

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