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Joined 2 years ago
Cake day: July 24th, 2023
  • A_A@lemmy.catoScience@beehaw.org•JWST Spots Giant Black Holes All Over the Early Universe | Quanta Magazine
    5·
    2 years ago

    I do believe there is a strong link to be understood between what is observed in this post and what was posted :
    X-Ray echo suggests our galaxy was “active” (quasar-like) just 200 years ago - Nature
    by @CanadaPlus one month ago.
    Thanks for this (X-Ray echo) post and for the last comment you made here in the other thread, about Penroses’ current work.

    So I will read through some of this and try to come back with something worthwhile to say.

    Update : I read some more and most of that is just out of my reach. The only paragraph I kind of understand somewhat is this :

    (…) conformal cyclic cosmology (CCC) theory.[67] In this theory, Penrose postulates that at the end of the universe all matter is eventually contained within black holes which subsequently evaporate via Hawking radiation. At this point, everything contained within the universe consists of photons which “experience” neither time nor space. There is essentially no difference between an infinitely large universe consisting only of photons and an infinitely small universe consisting only of photons. Therefore, a singularity for a Big Bang and an infinitely expanded universe are equivalent. [68]

    …and now I need some rest.

  • A_A@lemmy.catoScience@beehaw.org•JWST Spots Giant Black Holes All Over the Early Universe | Quanta Magazine
    1·
    2 years ago

    Under this very article you provided you can read, at criticism :
    At a conference in 2015, Penrose said :

    “inflation isn’t falsifiable, it’s falsified. … BICEP did a wonderful service by bringing all the Inflation-ists out of their shell, and giving them a black eye.” (…) Penrose’s shocking conclusion, though, was that obtaining a flat universe without inflation is much more likely than with inflation – “by a factor of 10 to the googol power!”

    Please read about this guy :

    Roger Penrose (…) mathematician, mathematical physicist, philosopher of science and Nobel Laureate in Physics.

    I read much more than the average person about it and my experience & education allows me to know how scientific research works. The fact is, not only inflation but Lambda CDM is dead.

    There is a lot more to say about it.

  • A_A@lemmy.catoScience@beehaw.org•JWST Spots Giant Black Holes All Over the Early Universe | Quanta Magazine
    1·
    2 years ago

    Cosmic microwave background (CMB) is very smooth ; if there was black holes in there I guess we would see (huge) unevenness.

    Hummm, or at least, that stupid LCDM would lead to such an expectation. … that model also put CMB at :
    400 000 to 500 000 years after the BBang.
    and most distant visible galaxies (and black holes) at :
    330 000 000 years after BB.

    if we go by this number we have a few hundred million years to produce such big things out of something very smooth.

    if we used a different model we could have much more time.

  • A_A@lemmy.catoSpace@beehaw.org•Beyond the Darkness - Dark Matter: A Baseless Hypothesis?
    2·
    2 years ago

    Thanks for explaining in simple words things that are out of my reach.

    I couldn’t understand the first equation in that article (which has 148 equations) : Hamiltonian formulation of gravity as a spontaneously-broken gauge theory of the Lorentz group by Tom Zlosnik.

    I read through the blog post you linked from Dr. Pavel Kroupa, The Dark Matter Crisis which is more easy to understand. From that blog I get that an explanation of the cosmos without the Big Bang is far from the main focus now.

    Before writing to you, I was already convinced MOND is superior to LCDM and this for the same reasons you give in your comments and some more.

    I hope in the next decades we will see consistent cosmology theories not only without dark matter but also without a big bang.

    P.S. : You might like this :
    A non-Standard model, David Merritt, Aeon Magazine, July 2021