Big Bang
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Big Bang



Ideas of the Big Bang

Ideas of the Big Bang



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Big Bang Big Bang Presentation Transcript

  • Please explain on your note card how this picture explains the Doppler Effect and how it relates to “Shifts in light”.
  • THE BIG BANG THEORY States that the universe began as a single cosmic explosion about 15 billion years ago .
  • Background Radiation
    • Energy left over from the Big Bang that is evenly spread out throughout the universe.
    • This background radiation is one observation that supports the Big Bang Theory.
  • After the Big Bang
    • Gravity began to affect matter racing in every direction.
    • The clumps formed into huge clusters of matter.
    • These clumps became the galaxies of the universe.
  • HUBBLES LAW The farther away the galaxy, the faster it is receding (moving away) from the earth.
  • Galaxies seem to be racing away from the center of the Universe.
    • Every galaxy seems to be moving away from Earth.
    • After examining the Red Shift that appears from distant galaxies astronomers conclude the universe is expanding at tremendous speeds.
  • Expanding Universe
    • If the universe is expanding, then the objects near the very edge of the universe are the oldest objects in the universe.
    • The most distant known objects in the universe are over 12 billion light years from the Earth
  • Three Pieces of Evidence Supporting the Big Bang
    • The presence of Background Radiation
    • The observation of the galaxies spreading away from the center of the universe (Red Shift)
    • Heat in space 3 °K
  • What Happens Next?
    • Astronomers feel that the Big Bang theory leads to two possible futures for the Universe.
  • Open Universe
    • Galaxies will continue racing outward (continue to expand). All of the stars will die off as the last of their energy is released. There will be nothing left, total emptiness.
  • Closed Universe
    • Gravitational attraction between the galaxies will cause the movement away from each other to slow and, eventually come to a halt. The gravitational pull will begin to pull the galaxies back to the center of the universe.
  • Closed Universe cont.
    • All of the matter and energy will again come close together and end in a central area (possibly no larger than a dime). Then another Big Bang will occur and the formation of the universe will begin all over again.
  • Um… I think we may have been here before.
    • This restructuring may occur once every 80 to 100 billion years.
  • Quasar