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Cosmology

Discussion in 'Current Events' started by Raoul, Feb 7, 2018.

  1. Feb 7, 2018
    #1

    Raoul Admin Staff

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    Thought we should have a dedicated thread for all things quantum mechanics to general relativity to cosmology.

    Interesting new piece on the big bounce.

  2. Feb 7, 2018
    #2

    11101 Full Member

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    Most books I read are around this subject... mind boggling stuff. I've personally always thought the cyclical universe sounded the most plausible as it fits a lot better with the human understanding of how things work. Things don't appear out of nowhere, but they do often expand/contrast/explode/bounce etc.
  3. Feb 7, 2018
    #3

    Ian Reus Ended 14 years of Grand National sweepstakes

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    This guy is worth a listen to.
    He's has quite a few peer reviewed papers published. He's also the brainchild of the unified field theory.
  4. Feb 7, 2018
    #4

    GBBQ Full Member

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    But there still had to be a first big bang though so at some stage everything appeared out of nowhere.
  5. Feb 7, 2018
    #5

    Tarrou Full Member

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    Brian Cox on Joe Rogan was fascinating stuff and made me want to read more - it's been 20 years since I read much about it so most of what I read is probably obsolete by now. He talked a lot about cosmic inflation and all the possibilities that arise should that theory by true.

  6. Feb 7, 2018
    #6

    11101 Full Member

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    If time is infinite there is no need for there to be a beginning. Everything has just always been there. So the theory goes anyway, although our brains can't comprehend infinity of any sort.
  7. Feb 7, 2018
    #7

    jackofalltrades Full Member

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    Sounds Godlike.
  8. Feb 7, 2018
    #8

    Raoul Admin Staff

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    Only if you think time actually started. If it is infinite then beginnings are irrelevant.
  9. Feb 7, 2018
    #9

    Kentonio Full Member

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    Or maybe god theories just sound Sciencelike? ;)
  10. Feb 7, 2018
    #10

    jackofalltrades Full Member

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    I can never get my head around these "it always was " ideas, nor if there was nothing before something and how it went from one to the other.

    Think I'll stick to the Lingard thread.:confused:

    While we're on the subject, why don't people experience time the same way physicists explain it ?

    I'll stick to Sandy Denny on this one.
  11. Feb 7, 2018
    #11

    GBBQ Full Member

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    I have enough existential fear over the fact that we're on a rock flying through outer space. Infinite past is too much to handle of a Wednesday.
  12. Feb 7, 2018
    #12

    Rob Full Member

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    Even if it’s something I know practically nothing about, I find it one of the most interesting subjects.

    How and why we are here - essentially, what’s the point of it all, and how, when and why it’ll end (because surely it will).
  13. Feb 7, 2018
    #13

    Kentonio Full Member

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    People only experience anything through a very narrow lens of relevance. For instance when its raining you can't see and detect how many drops of rain hit you right? You just know that you're getting wet. You don't see or feel how many blades of grass you walk on even barefoot, you just have the sensation that you're walking on grass. We evolved sensory inputs that are useful for maintaining our survival, the really amazing thing is that our minds can even comprehend this stuff that is so much greater and at so many different scales to our own. Even though we do still struggle with concepts like vast numbers or tiny scales.
  14. Feb 7, 2018
    #14

    jackofalltrades Full Member

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    Those are definitely questions for a windy,rainy,cold Wednesday night game in Stoke.:confused:
  15. Feb 7, 2018
    #15

    Rob Full Member

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    In Stoke? Then yeah, I suppose it is:lol:
  16. Feb 7, 2018
    #16

    The Firestarter Full Member

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    Not sure QM stuff should be here. Since, you know, it's not really agreeing with GR, yet.
  17. Feb 7, 2018
    #17

    Raoul Admin Staff

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    It doesn't have to agree with GR since this isn't a GR thread. Its an all things QM/GR/Cosmology thread where we can discuss any of the above without getting side tracking about news of the latest telescope or the latest Elon Musk publicity stunt.
  18. Feb 17, 2018
    #18

    Raoul Admin Staff

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  19. Feb 17, 2018
    #19

    Silva Full Member

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    Smoke crack like Isaac Asimov
    things kept colliding with it, you're welcome quanta's twitter handler
  20. Feb 17, 2018
    #20

    Raoul Admin Staff

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    They are disputing whether this was possible given its size and the amount of time required for it to grow that much.

  21. Feb 18, 2018
    #21

    hobbers Full Member

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    Two black holes colliding?
  22. Feb 18, 2018
    #22

    Raoul Admin Staff

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    It may have needed more than that to reach a mass of 780m suns
  23. Feb 18, 2018
    #23

    Silva Full Member

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    I'd hate to expose my mathematical ignorance, but that just tells me the Eddington rate is wrong (as applied to black holes).
  24. Feb 18, 2018
    #24

    Silva Full Member

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    Black holes are pretty common, there's little reason why there can't have been multiple collisions.
  25. Feb 18, 2018
    #25

    Raoul Admin Staff

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    I know they collide with one another on occasion, but this would be one hell of a collision.