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Did the universe Absolutely begin?

  1. Dec 15, 2016 #1
    Did the universe Absolutely begin?
     
  2. jcsd
  3. Dec 15, 2016 #2

    phinds

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    Your question is extemely vague. What does "absolutely begin" even mean?

    In answer to what I THINK you are asking, the answer is we don't know
     
  4. Dec 15, 2016 #3
    Absolutely begin, In the sense of undeniable, and very, very likely.
     
  5. Dec 15, 2016 #4

    phinds

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    Then the answer remains, we don't know.
     
  6. Dec 15, 2016 #5
    What is more likely?
     
  7. Dec 15, 2016 #6

    phinds

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    We don't know. It's turtles all the way down.
     
  8. Dec 15, 2016 #7

    Chalnoth

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    There's no way to know at present what happened (if anything) before our region of space-time began.

    One reason for this is that cosmic inflation, which is one of the prevailing models for the early universe, wipes out almost all information about what the universe was like prior to inflation. Without evidence, we can't say what happened before that (if anything).
     
    Last edited: Dec 15, 2016
  9. Dec 15, 2016 #8
    The question is not knowing what was "before" (because time would also have begun), but if at some "moment" there was no universe.
     
  10. Dec 15, 2016 #9
    The universe we currently live in begins at every given moment.
     
  11. Dec 15, 2016 #10

    phinds

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    And again, we don't know. I take it you are just not going to take that for an answer and you are going to continue to ask questions that end up at the same place. Seems like a waste of time, but good luck.
     
  12. Dec 15, 2016 #11

    Chronos

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    If you are asking if a state unlike like that of the current universe preceded it, the answer is clearly yes. If you are asking if a state of absolute nothing preceded that of the currently known universe, that's more complicated. It starts with an argument in semantics [like how you define 'absolute nothing'?]. In the philosophical sense, absolute nothing never has and never will exist anywhere in the universe. That would imply a ponderable property enabling you to distinguish it from a pure state of nonexistence.
     
  13. Dec 15, 2016 #12

    PeterDonis

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    What does this mean?

    The fact that you keep on getting vague responses is because your questions are vague. I would advise taking a step back and thinking very carefully about what, exactly, you want to ask. It might help to ask yourself, what observations could we make (even if they're not at all practical, just possible in principle) that would tell us whether the answer to your question is yes or no? If you can't think of any, that's a red flag that your question is too vague.
     
  14. Dec 15, 2016 #13
    If 'there is no Universe' then there is no anything.
    Nothing happens.
    Ever.
     
  15. Dec 16, 2016 #14
    Scientists really need to get to the bottom of this. These questions are bugging a lot of people and it would help to have some answers.
     
  16. Dec 16, 2016 #15

    Drakkith

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    Hey, if you know a way to see past the CMB, invent brand new mathematical, philosophical, and scientific concepts that probably don't exist yet, and have the ability (and resources) to quickly develop the equipment necessary to carry out new observations to confirm these theories, please let scientists know.

    If you don't, then just try to have a little patience. It's taken about 13 billion years to get to this point. It may take a few years more to find the answer.
     
  17. Dec 17, 2016 #16
    Scientists _do_ think about it.

    More precisely, they are trying to develop mathematically valid theories which explain how Big Bang started. Of course, there are also alternatives where time is infinite in the past direction too, not only in the future direction (for example, "eternal inflation" models), and thus in these models there is no beginning.

    It's quite possible that several different fully consistent models will eventually be developed, but we won't be able to find any empirical means to distinguish them. Seeing 13bn years back into the past and past CMB "wall" is very hard.
     
  18. Dec 19, 2016 #17
    Is it starting every moment?
     
  19. Dec 19, 2016 #18
    [quote = "phinds, pós: 5644881, membro: 310841"] E mais uma vez, nós não sabemos. Acho que você simplesmente não vão tomar isso como uma resposta e você vai continuar a fazer perguntas que acabam no mesmo lugar. Parece ser um desperdício de tempo, mas boa sorte. [/ QUOTE]

    Thanks for your response. More sorry for my ignorance of wanting to hear what others have to say; Because you are the owner of the truth.
     
  20. Dec 19, 2016 #19
    [QUOTE = "Chronos, post: 5644961, membro: 10970"] Se você está perguntando se um estado diferente de como a do atual universo precedeu, a resposta é claramente sim. Se você está perguntando se um estado de absoluta nada precedeu a do universo conhecido atualmente, isso é mais complicado. Ela começa com uma discussão na semântica [como como você define "nada absoluto"?]. No sentido filosófico, nada absoluto nunca foi e nunca vai existir em qualquer lugar do universo. Isso implicaria uma propriedade ponderável permitindo-lhe distingui-lo de um puro estado de inexistência. [/ QUOTE]

    Was talking about the absence of space-time reality as a whole. Was the uniqueness eternal? Was it material?
     
  21. Dec 19, 2016 #20

    PeterDonis

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    Sorry, this doesn't make your question any less vague.

    (Also, your quote of my post appears to be translated into Spanish.)
     
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