does the univerce have an end, a limit?

Discussion in 'Astronomy, Exobiology, & Cosmology' started by Shadow1, Jan 1, 2010.

  1. Emil Valued Senior Member

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    Is there a fourth dimension?
    If so, might our world be finite in the fourth dimension.
    Another idea would be: the absolute zero degrees (0K), there is no movement, so it is end.:bugeye:
     
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  3. Dywyddyr Penguinaciously duckalicious. Valued Senior Member

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    Yes: time.

    Yep, the world isn't going to last forever.

    That's if 0K can ever be achieved, which is slightly more than doubtful.
     
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  5. Emil Valued Senior Member

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    I was referred to the real fourth dimension, not time.
     
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  7. Dywyddyr Penguinaciously duckalicious. Valued Senior Member

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    I see. What do think is the "real" fourth dimension?
    What makes you think time isn't it?
     
  8. Emil Valued Senior Member

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    If there is a world of two dimensions, means that missing third dimension.
    So he has no volume.
    So he does not exist on the third dimension.

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  9. Emil Valued Senior Member

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    Time can be also.
    But xyzv is more interesting, more exciting.
    Everyone understands the time.
    But subspace? Speed greater than light?
     
  10. Dywyddyr Penguinaciously duckalicious. Valued Senior Member

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    Also? In addition to what?

    It may well be "more exciting" but what is "v"?

    What is "subspace" and what goes faster than light?
     
  11. Dywyddyr Penguinaciously duckalicious. Valued Senior Member

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    What does that have to do with your hypothetical 4th dimension?
    And yes he would have a third dimension - time is the 3rd in a 2D world.
     
  12. Emil Valued Senior Member

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    uh oh... Mi English not so good.
    A spreadsheet has two dimensions.
    Yu bend sheet and go from point A to point B, but in space and not on the sheet.
    Speed, calculated on the sheet is much larger than the true speed
    Since the distance is longer.
    If the world is curved in the fourth dimension.
    Get out in three dimensions.
    Go straight into the fourth dimension.
    Back into the third dimension.
    You came faster than light in the third dimension.
     
  13. Dywyddyr Penguinaciously duckalicious. Valued Senior Member

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    I think you mean "sheet of paper".
    And your English is pretty good.

    Yes, that's an old illustration.
    But the FACT is that we haven't found a "fourth dimension" to fold space into, and even if we had we don't have any idea of how to fold our space into it.
    It's all very speculating, but without evidence that it's possible or feasible then it remains speculation.
     
  14. Emil Valued Senior Member

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    That is the idea of movies SC-fi.Hyperspace.
     
  15. Dywyddyr Penguinaciously duckalicious. Valued Senior Member

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    But that's the point: it's science-fiction not science fact.
     
  16. Emil Valued Senior Member

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    Yes,is only speculation.
    If there is a world of two dimensions, means that missing third dimension.
    So he has no volume.
    So he does not exist on the third dimension.
    Extrapolated to the third and fourth dimension.
    Three-dimensional world not exist for the four dimensions.
     
  17. Dywyddyr Penguinaciously duckalicious. Valued Senior Member

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    It doesn't necessarily follow from a 2D world being able to be extended into a 3D world that it's possible there is a fourth spacial dimension to be found from our 3D existence.
    There may be (it's highly unlikely), but the 2D -> 3D does not mean that 3D -> 4D MUST exist.
     
  18. Emil Valued Senior Member

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    You are right but it is exciting.
    By the way, you can define time?
     
  19. Dywyddyr Penguinaciously duckalicious. Valued Senior Member

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  20. Emil Valued Senior Member

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  21. Cyperium I'm always me Valued Senior Member

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    I heard that the flow of time is also the result of the universe expanding, it isn't only expanding in space, but also in time.

    The observable universe (what is often meant with "the universe"), is what we can see, so the universe is as far as we can possibly see, and the edge is at the beginning (from our point of view), if we could see to the end of the universe then we would observe the big bang (actually, we wouldn't, simply because the Big Bang is surrounded by a event-horizon which is impossible to look through).

    Actually, in every direction, where-ever you look, at the end there is the big bang. The Big Bang was the start of everything, so all of space has been a part of the big bang, it happened everywhere.
     
    Last edited: May 21, 2010
  22. joepistole Deacon Blues Valued Senior Member

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    I don't think we have a definative answer to that question. We just do not know enough to be able to say with any degree of confidence if there will be an end to the universe.

    I think the current thinking is that there was never a begining and there will not be an end. Perhaps your question could be better answered if it were restructured, will the universe remain constant - without much change? I think we know enough about the universe to say that is not very likely. The one thing that appears to be constant about the universe is change...not with standing the prediction that the universe will rip itself (dark energy) into a pile of subatomic particles at some point in the distant future.
     
  23. Anna1 Registered Member

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    This is a really interesting question. It's hard to tell if there is a limitation or not. Just sitting here and guessing doesn't prove anything. It hasn't been proved yet, so let's just let it be a mystery.
     

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