The Big Bang Theory

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The Big Bang Theory
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The Big Bang Theory
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The Big Bang Theory
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The Big Bang Theory
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THE BIG BANG THEORY

• States that the universe began as a single cosmic
  explosion about 15 billion years ago.

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Background Radiation

• Energy left over from the Big Bang that is evenly
  spread out throughout the universe.

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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.

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After the Big Bang

• Gravity began to affect matter racing in every
  direction.

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After the Big Bang

• Gravity began to affect matter racing in every
  direction.
• The clumps formed into huge clusters of matter.

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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.

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HUBBLES LAW

• The farther away the galaxy, the faster it is
  receding (moving away) from the earth.

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Galaxies seem to be racing away from the center
of the Universe.

• Every galaxy seems to be moving away from Earth.

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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.

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Expanding Universe

• If the universe is expanding, then the objects
  near the very edge of the universe are the oldest
  objects in the universe.

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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

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What Happens Next?

• Astronomers feel that the Big Bang theory leads
  to two possible futures for the Universe.

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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.

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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.

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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 10 cent piece). Then
  another Big Bang will occur and the formation of
  the universe will begin all over again.

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Um I think we may have been here before.

• This restructuring may occur once every 80 to 100
  billion years.

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Quasar