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Bigbang and the begginnig of time

  1. Apr 22, 2013 #1

    adjacent

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    What could have been happened in the bigbang.If there were an observer what would s/he see.
    And were there absolutely Nothing before big bang,Does that make any sense?
     
  2. jcsd
  3. Apr 22, 2013 #2

    Chronos

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    The big bang model does not attempt to address the origin of the universe. It's only applies to the post inflationary universe.
     
  4. Apr 22, 2013 #3

    phinds

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    The big bang theory does not make any statement about the singularity or if anything came before. It is a theory of how the universe evolved starting at about one Plank time after the singularity.
     
  5. Apr 22, 2013 #4

    adjacent

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    But bigbang theory claims that the universe started from a point.Am I right?
     
  6. Apr 22, 2013 #5

    phinds

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    Most emphatically NOT. The universe in the big bang theory is a hot dense plasma of unknown size and shape but DEFINITELY not a point. It might have been infinite in extent.
     
  7. Apr 22, 2013 #6
    There are many different ideas cosmologists are pursuing about what might have happened at the big bang, none of them are experimentally confirmed. The debate is ongoing. Google these terms for some of these ideas: (there are probably many more)
    loop quantum cosmology
    eternal inflation
    ekpyrotic universe
    conformal cyclic cosmology
    string gas cosmology
    matter bounce
    Gott-Li
    Caroll/Chen
    Braum Framptn
    Cosmic natural Selection
     
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