Why the Cosmic Dawn Holds the Keys to Understanding Our Universe | Richard Ellis (337)

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  • Опубликовано: 20 дек 2024

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  • @DrBrianKeating
    @DrBrianKeating  Год назад +10

    Did the Big Bang happen? If so, only once or more than once?

    • @smlanka4u
      @smlanka4u Год назад +1

      Hungry Black Holes could make a Big Bounce soon after eating both ordinary matter and dark matter. An accelerated gravitational contraction could convert Black Holes into high-energy beams of matter. According to the Buddha, a high-energy rain of matter filled the early universe during the stable contraction period called Sanvatta-sthai Kalpa. The lifetime of the observable universe is a Maha-Kalpa. And there were Maha-Kalpas more than the sand particles in the Ganges river.

    • @nunomaroco583
      @nunomaroco583 Год назад +1

      Hi, if i understand its concensus in Cience comunity that yes it happens, what is not clear, is a fhase transition or not. ....

    • @nunomaroco583
      @nunomaroco583 Год назад +1

      Science, sorry. ...

    • @wearemany73
      @wearemany73 Год назад +2

      The cyclical method seems to be unpopular due to a particular failure of intuition humans have when imagining eons of time and being unable to fathom the number universal cycles required to achieve “fine tuning” If we wouldn’t exist in those eons that don’t measure up to fine tuning we would know about it. In any case, the “cyclical” model gets us into the fine tuning N-zone 😊

    • @wearemany73
      @wearemany73 Год назад +2

      I’m loving the content you’re putting out at the moment. I’d be interested in your take on the way the Chinese lab dealt with their “science” and how not to undertake the Socratic method. Since you’re an experimental physicist 👨‍🔬 it should be an interesting POV. 😊

  • @Ola-fh1er
    @Ola-fh1er Год назад +13

    Hi Brian. I'm a middle aged woman watching this with my 87 year old uncle. Just thought I'd let you know we are here screwing up your demographic and having a great time. ❤ ty

    • @DrBrianKeating
      @DrBrianKeating  Год назад +8

      I love it! Thank you, and please share with even older friends 😀

    • @Ola-fh1er
      @Ola-fh1er Год назад

      @@DrBrianKeating Thank you!!

  • @CandideSchmyles
    @CandideSchmyles Год назад +5

    He states at around 15.00 minutes that "the galaxies are not expanding relative to each other" which is born out observationally by galaxies clustering and galactic clusters in turn clustering along node points in the cosmic web. So it appears to be the 'voids' that are doing the actual expansion. So I would be interested to know is there observational evidence that the filamentary strings that connect the nodes exhibiting stretching consistent with the hypothesis of expansion? Personally I remain unconvinced that this apparent expansion is real, especially as accelerating expansion. As each new study is returning different values on the expansion rate scepticism is not unfounded. Filamentary expansion may be a good method to not just confirm any expansion but to measure it at local void level as well as universally providing evidence for the homogeneity, or lack there of, of any expansion.

    • @edcunion
      @edcunion Год назад

      Good point, the universal filaments are apparently rotating too, are red and blue shifted helical vortices, that channel galaxies, their supermassive black holes & dust along the filaments. There's info now too that the filaments are magnetized? How does this motion all gel with the idea that the universal contents and the metric itself is free falling outward toward its bounding horizon, and not inward toward its Hamiltonian centroid? Gravity has literally apparently collapsed in proximity to the centroid? Why we are not literally crushed out of existence by gravity & gravity wave radiation?

  • @גבריאל-ח3י
    @גבריאל-ח3י Год назад +1

    Thanks!

  • @mikeclarke952
    @mikeclarke952 Год назад +3

    Great presentation by Richard and discussion Brian, thanks.

  • @lindsayforbes7370
    @lindsayforbes7370 Год назад +4

    Fascinating presentation Prof Ellis. Many thanks from another 1950 enthusiast.

  • @1PrinceWilliam
    @1PrinceWilliam Год назад +3

    9:47 Dr. Keating, I couldn’t agree with you more. As a society, I feel there’s no excuse for every child being a junior astronomer (or scientist in general). With technology where it is a present, the most rudimentary of telescopes has to be cheaper and better than ever. In fact, I would argue that should another tool in every child’s tool kit, just as calculators and protractors are.
    Ethical issues notwithstanding, I could argue the value of class trips to an observatory or planetarium over the zoo.

    • @Ola-fh1er
      @Ola-fh1er Год назад +1

      we can do both! I did. I agree we need to include a telescope as a basic tool. Every house used to have binoculars , just an extension of that.
      (We should also have microscopes.)

    • @manifold1476
      @manifold1476 Год назад

      Did you study any "grammar" in school? How about Logic?
      Of course there's "no excuse" for "every child being a junior astronomer . . . " *because NOT EVERY CHILD is a junior astronomer!!!* - - - So you can STOP WORRYING OVER THAT ONE!!! ffs!!!
      P.S. ---> You're not "a society" either, so your "feelings" are not applicable.

  • @gerardbiddle1808
    @gerardbiddle1808 Год назад

    Thank you Richard and Brian for the history and travel through the cosmos! The presentation was wonderful and exciting even exhilarating. Many thanks for the journey. What an exciting time you have both had in your academic and scientific life to date. 56:27

  • @arctic_haze
    @arctic_haze Год назад +7

    "Proofs" is a term from mathematics. In physics, we can have several lines of evidence for something, but not proofs.

    • @GeneralSulla
      @GeneralSulla Год назад

      Physics is just a little more than a guessing game. An informed guessing game but a guessing game nonetheless. Now as a person trained in chemistry, I find guessing intolerable. Lol!

    • @arctic_haze
      @arctic_haze Год назад +1

      @@GeneralSulla You must mean theoretical physics. This is not the full story. Theory needs experimental tests. If this is not possible, even a most beautiful theory (meaning built on beautiful mathematics) is not really science

  • @lwss1617y
    @lwss1617y Год назад +2

    Thanks much for the time travel! Two things: 1. Astronomy is a fascinating Queen, and 2. the need to understand basic theory (not just for experimentalists,...). I really enjoy these shows.

  • @user-vi3sz3fg2r
    @user-vi3sz3fg2r Год назад +2

    Delightful :)

  • @the.trollgubbe2642
    @the.trollgubbe2642 Год назад +3

    I think our universe was created from a big black hole from another universe. I am not a physicist, but that makes sense to me, Is that a dumb speculation ?

    • @manifold1476
      @manifold1476 Год назад +1

      yes , very (not dumb), but "uninformed."
      🤖more study required🤖more study required🤖

    • @the.trollgubbe2642
      @the.trollgubbe2642 Год назад

      @@manifold1476 what should I study in order to understand ?

  • @nunomaroco583
    @nunomaroco583 Год назад +1

    Just amazing, some already think that the cause of much brigther galaxies, that theory predict, is caused by Black-Holes disk. ....amazing.

  • @nunomaroco583
    @nunomaroco583 Год назад +2

    Hi, from Portugal.....go.

  • @JtsTubes
    @JtsTubes Год назад +5

    I’m interested and will watch but please explain where all the material coalesced from in order for the Big Bang to even happen and not give us the typical bs story about how it’s not relevant or explainable in words. Thanks!

    • @MaryAnnNytowl
      @MaryAnnNytowl Год назад

      Why must something be explained to you which doesn't necessarily have a certain answer? Sometimes science has to say "we don't know yet." Deal with it.

    • @robbie_
      @robbie_ Год назад

      @@MaryAnnNytowl Good grief. Science rarely says "we don't know yet". It says "we're certain it's going to be very bad, give me more money to study it".

    • @JtsTubes
      @JtsTubes Год назад

      @@MaryAnnNytowl I’m sure science is glad to have you as it’s official spokes person.

    • @Kenneth-ts7bp
      @Kenneth-ts7bp Год назад

      @@MaryAnnNytowl That's how we got to the moon, by saying, "I don't know!".

    • @Ola-fh1er
      @Ola-fh1er Год назад

      Maybe they do not know!! but my guess at the moment is it is something like Matter and Antimatter. don't you think so?

  • @Lesser302
    @Lesser302 Год назад +1

    🙋🏻‍♂️question ? Do the Star expand in 90 degree or other vectors like magnets only to repel or attract at inverted vectors of parallels
    With in the Heaviside factors and formula in a vacuum of positive charged particles through space over time ?
    Do atoms and particles mapped reactions in the collider act the same as the expansion ? Dose the heat or cold interact to the forces applied through magnetic repletion and dissipation ?
    AI doesn’t know 😢

    • @Lesser302
      @Lesser302 Год назад +1

      50:52 origins of the wheel ?
      A cross or crux. The winch and tool of old. A pivot point a lever and a fulcrum all in 1
      The origins of a cross.
      A boomerang 😂 we all know how that went. Why won’t you burn stick “ throws bent stick”
      Sits down “ whack in the back of the head 😂👣 the birth of the wheel and flight with a simple weapon.
      It was just a stick 👁

  • @janklaas6885
    @janklaas6885 Год назад +1

    📍29:03

  • @csiri6758
    @csiri6758 Год назад +1

    lol sure it's gold coated to improve reflectance in the infrared... just admit it, it's to make feel scientists special