Has the Big Bang Theory Been Proven Wrong?

Discussion in 'Science' started by Bob0627, Apr 23, 2023.

  1. WillReadmore

    WillReadmore Well-Known Member

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    Experts have done no more than make statements about the range of effects that these data MIGHT support.

    Perhaps in the future you won't swallow the first indication of a question existing as if it is the proven end of all human knowledge concerning cosmology.

    TRY to hold your water until physicists can do some analysis.
     
  2. drluggit

    drluggit Well-Known Member

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    LOL... Physicists are the folks making these concerns known/public. I know, it might seem unseemly to you that folks can make decisions quickly and admit where they were previously misinformed and wrong. You? Don't get too close to the edge... you might fall off...
     
  3. WillReadmore

    WillReadmore Well-Known Member

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    Physicists have NOT concluded that these data can only be accounted for by ditching the big bang theory.

    You are unbelievably single minded about your desire to consider science to be crap.

    Why?
     
  4. WillReadmore

    WillReadmore Well-Known Member

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    Yes - it's pretty darn exciting stuff!

    But, decisions on early cosmology are NOT made in a reflexive manner. They require serious thought and confirmation.
     
  5. drluggit

    drluggit Well-Known Member

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    They have, which is why they are posting about it. Sorry this wrecks you so.
     
  6. drluggit

    drluggit Well-Known Member

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    Good to know that you won't be a part of that process. Thanks in advance for steering clear.
     
  7. Jack Hays

    Jack Hays Well-Known Member Donor

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    [This is a transcript of the video embedded below. Some of the explanations may not make sense without the animations in the video.]

    We don't know how the universe began, and we will never know

    Did the universe come out of a black hole? Will the big bang repeat? Was the universe created from strings? Physicists have a lot of ideas about how the universe began, and I am constantly asked to comment on them. In this video I want to explain why you should not take these ideas seriously. Why not? That’s what we’ll talk about today.

    The first evidence that the universe expands was discovered by Edwin Hubble who saw that nearby galaxies all move away from us. How this could happen was explained by none other than Albert Einstein. Yes, that guy again. His theory of general relativity says that space responds to the matter and energy in it by expanding.

    And so, as time passes, matter and energy in the universe become more thinly diluted on average. I say “on average” because inside of galaxies, matter doesn’t dilute but actually clumps and space doesn’t expand. But in this video we’ll only look at the average over the entire universe.

    So we know that the universe expands and on average matter in it dilutes. But if the universe expands today, this means if we look back in time the matter must have been squeezed together, so the density was higher. And a higher density of matter means a higher temperature. This tells us that in the early universe, matter was dense and hot. Really hot. At some point, matter must have been so hot that atoms couldn’t keep electrons around them. And even earlier, there wouldn’t even have been individual atomic nuclei, just a plasma of elementary particles like quarks and gluons and photons and so on. It’s like the alphabet soup of physics.

    And before that? We don’t know. We don’t know because we have never tested what matter does at energy densities higher than those which the Large Hadron Collider can produce.

    However, we can just ignore this difficulty, and continue using Einstein’s equations further back in time, assuming that nothing changes. What we find then is that the energy density of matter must once have been infinitely large. This is a singularity and it’s where our extrapolation into the past breaks down. The moment at which this happens is approximately thirteen point seven billion years in the past and it’s called the Big Bang.

    The Big Bang didn’t happen at any particular place in space, it happened everywhere. I explained this in more detail in this earlier video.

    Now, most physicists, me included, think that the Big Bang singularity is a mathematical artifact and not what really happened. It probably just means that Einstein’s theory stops working and we should be using a better one. We think that’s what’s going on, because when singularities occur in other cases in physics, that’s the reason. For example, when a drop of water pinches off a tap, then the surface curvature of the water has a singular point. But this happens only if we describe the water as a smooth fluid. If we would take into account that it’s actually made of atoms, then the singularity would go away.

    Something like that is probably also why we get the Big Bang singularity. We should be using a better theory, one that includes the quantum properties of space. Unfortunately, we don’t have the theory for this calculation. And so, all that we can reliably say is: If we extrapolate Einstein’s equations back in time, we get the Big Bang singularity. We think that this isn’t physically correct. So we don’t know how the universe began. And that’s it. . . . .
     
    Last edited: May 4, 2023

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