Life Cycle of a Star
Nebula <ul><li>1 st  Stage of Life </li></ul><ul><ul><li>Ball of gas and dust that is pulled together by gravity </li></ul...
 
Protostar <ul><li>As a nebula collapses and gravitational forces and rotation factor in a nebula will condense in the cent...
<ul><li>Four types of stars make up the life of a star </li></ul><ul><ul><li>Main Sequence </li></ul></ul><ul><ul><li>Gian...
<ul><li>Main Sequence (the Sun) </li></ul><ul><ul><li>2 nd  stage </li></ul></ul><ul><ul><li>Longest stage </li></ul></ul>...
 
<ul><li>Giants and Supergiants </li></ul><ul><ul><li>3 rd  stage </li></ul></ul><ul><ul><li>Main Sequence star becomes a r...
 
<ul><li>White Dwarf   small hot star that is the leftover center of an older star </li></ul><ul><ul><li>Final stage </li>...
 
<ul><li>Hertzprung-Russell Diagram </li></ul><ul><ul><li>Shows the relationship between a star’s surface temperature and a...
 
<ul><li>Age of stars </li></ul><ul><ul><li>Average stars become red giants then white dwarfs </li></ul></ul><ul><ul><li>Mo...
<ul><li>Supernova   gigantic explosion in which a massive star collapses  </li></ul><ul><ul><li>Occurs after a massive st...
 
 
 
<ul><li>Black Hole   an object that is so massive that light cannot escape its gravity </li></ul><ul><ul><li>Remnants of ...
 
Question 1 <ul><li>What kind of a star is the sun? </li></ul>
Answer <ul><li>Main Sequence </li></ul>
Question 2 <ul><li>What is the H-R diagram? </li></ul>
Answer <ul><li>A graph that shows the relationship between a star’s temperature and absolute magnitude </li></ul>
Question 3 <ul><li>What are the four main types of stars? </li></ul>
Answer <ul><li>Main-Sequence </li></ul><ul><li>Giants and Supergiants </li></ul><ul><li>White Dwarfs </li></ul>
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L Ife Of A Star

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L Ife Of A Star

  1. 1. Life Cycle of a Star
  2. 2. Nebula <ul><li>1 st Stage of Life </li></ul><ul><ul><li>Ball of gas and dust that is pulled together by gravity </li></ul></ul><ul><ul><li>Nuclear fusion starts as gas cloud becomes denser and hotter </li></ul></ul><ul><li>Nuclear Fusion  hydrogen atoms fuse into helium </li></ul><ul><ul><li>Creates the intense energy found in stars </li></ul></ul>
  3. 4. Protostar <ul><li>As a nebula collapses and gravitational forces and rotation factor in a nebula will condense in the center. </li></ul><ul><li>Eventually the amassed heat becomes enough to start nuclear fusion. </li></ul>
  4. 5. <ul><li>Four types of stars make up the life of a star </li></ul><ul><ul><li>Main Sequence </li></ul></ul><ul><ul><li>Giants </li></ul></ul><ul><ul><li>Super Giants </li></ul></ul><ul><ul><li>White Dwarfs </li></ul></ul>
  5. 6. <ul><li>Main Sequence (the Sun) </li></ul><ul><ul><li>2 nd stage </li></ul></ul><ul><ul><li>Longest stage </li></ul></ul><ul><ul><li>Hydrogen changes into helium which creates enormous amounts of energy </li></ul></ul><ul><ul><li>The size of the star does not change much </li></ul></ul>
  6. 8. <ul><li>Giants and Supergiants </li></ul><ul><ul><li>3 rd stage </li></ul></ul><ul><ul><li>Main Sequence star becomes a red giant </li></ul></ul><ul><li>Red giant  star that expands and cools once is loses all its hydrogen </li></ul><ul><ul><li>Center shrinks and atmosphere grows large and cools </li></ul></ul>
  7. 10. <ul><li>White Dwarf  small hot star that is the leftover center of an older star </li></ul><ul><ul><li>Final stage </li></ul></ul><ul><ul><li>Can shine for billions of years before they extinguish </li></ul></ul>
  8. 12. <ul><li>Hertzprung-Russell Diagram </li></ul><ul><ul><li>Shows the relationship between a star’s surface temperature and absolute magnitude </li></ul></ul><ul><ul><li>Used to study the lives of stars </li></ul></ul><ul><ul><li>Most stars lie along the main sequence portion of the diagram </li></ul></ul>
  9. 14. <ul><li>Age of stars </li></ul><ul><ul><li>Average stars become red giants then white dwarfs </li></ul></ul><ul><ul><li>More massive stars explode into a variety of objects </li></ul></ul>
  10. 15. <ul><li>Supernova  gigantic explosion in which a massive star collapses </li></ul><ul><ul><li>Occurs after a massive star uses up its fuel source </li></ul></ul><ul><li>Neutron Star  a star that has collapsed to a point at which all particles are neutrons </li></ul><ul><ul><li>A neutron star that spins and sends out beams of radiation is called a pulsar </li></ul></ul>
  11. 19. <ul><li>Black Hole  an object that is so massive that light cannot escape its gravity </li></ul><ul><ul><li>Remnants of a supernova </li></ul></ul><ul><ul><li>Astronomers can detect black holes by using X-ray telescopes </li></ul></ul>
  12. 21. Question 1 <ul><li>What kind of a star is the sun? </li></ul>
  13. 22. Answer <ul><li>Main Sequence </li></ul>
  14. 23. Question 2 <ul><li>What is the H-R diagram? </li></ul>
  15. 24. Answer <ul><li>A graph that shows the relationship between a star’s temperature and absolute magnitude </li></ul>
  16. 25. Question 3 <ul><li>What are the four main types of stars? </li></ul>
  17. 26. Answer <ul><li>Main-Sequence </li></ul><ul><li>Giants and Supergiants </li></ul><ul><li>White Dwarfs </li></ul>

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