How Fast is the Universe Expanding

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  • Опубликовано: 28 янв 2025

Комментарии • 10

  • @chrimony
    @chrimony 12 дней назад +2

    Solution 3: Not new physics, not a mistake in measuring. A mistake in assumptions.

    • @paulfellows5411
      @paulfellows5411  11 дней назад +2

      Yes, assumptions are frequently the issue with the models. An unavoidable problem in most cases

  • @flinxsl
    @flinxsl 16 дней назад

    Interesting discussion at the end. I have heard 10^120 come up in one other prediction: the number of bits of information contained in the universe. Could the two be related?

    • @paulfellows5411
      @paulfellows5411  2 дня назад

      Interesting isn’t it
      In the same way the radius of a black hole with the mass of the universe seems to be the size of the universe… (depending on various assumptions) and thereby the entropy of the surface of such a black hole might match that number of bits of information
      Are we actually in the matrix ? I think not, but it makes you think!

  • @Kraflyn
    @Kraflyn 20 дней назад

    where is Paul? 0o Paul, what's your take on us being inside the rotating black hole horizon please?

    • @paulfellows5411
      @paulfellows5411  19 дней назад +1

      I’m working towards it, but need to make sure I have a good storyboard and explanation that works without loads of hard maths :-)

    • @Kraflyn
      @Kraflyn 19 дней назад

      @@paulfellows5411 hubble tension, quasar discrepancy, great attractor, big bang singularity, cmb dipole, all point towards it. Yeah, would need geodesics, and possibly changing the signature of the interior metric... also, the Fridman metric assumes big bang happened everywhere at the same time, which is not relativistic. Maybe you have seen some paper already discussing this? It should be a rotating black hole, the Kerr black hole, because it is known that the Schwarzschild black hole doesn't cut it. Rotation would also produce the dipole observed in cmb, which enters through the horizon, and then different parts of the black hole interior rotate differently. I haven't encountered a paper on it yet.

  • @DavoidJohnson
    @DavoidJohnson 15 дней назад

    Shame about the rush to meet time restraints making some of the talk garbled. Perhaps a more documentary type of program would suit. Carbon 14 dating doesn't stretch to the age of the earth. For that you need a much longer half life such as uranium to lead.

    • @paulfellows5411
      @paulfellows5411  2 дня назад

      It was a live talk, recorded in a single take and unedited. As is generally the case with my channel since they all originate as part of our association’s lecture program at the university of Cambridge observatories