Black hole cosmology suggests our entire universe formed inside a black hole from another universe

Black hole cosmology suggests that the Milky Way and every other observable galaxy in our universe is contained within a black hole that formed in another, much larger, universe.

The theory challenges many fundamental models of the cosmos, including the idea that the Big Bang was the beginning of the universe.

It also provides the possibility that black holes within our own universe may be the boundaries to other universes, opening up a potential scenario for a multiverse.

Mine blown 🤯

  • Null User Object@lemmy.world
    37·
    21 hours ago

    Last few paragraphs…

    Shamir noted that an alternative explanation for why most of the galaxies in the study rotate clockwise is that the Milky Way’s rotational velocity is having an impact on the measurements.

    “If that is indeed the case, we will need to re-calibrate our distance measurements for the deep universe,” said Shamir.

    "The re-calibration of distance measurements can also explain several other unsolved questions in cosmology such as the differences in the expansion rates of the universe and the large galaxies that according to the existing distance measurements are expected to be older than the universe itself.”

    That’s leading me to think that that’s actually the more probable explanation, and the black hole idea comes in a distant second in terms of probability, but is much more attention grabbing/sensational/click-baity.

    • CheeseNoodle@lemmy.worldEnglish
      142·
      21 hours ago

      The black hole idea is actually weirdly solid, its a case of the maths says we definetaly should be but observation and just intuition says its crazy. If you consider the event horizon to be the surface of a volume, black holes get less dense as their radius increases, you can have a black hole with the same density as rock, water, air, even the miniscule density of the gas in a vacuum, so long as teh black hole is large enough. The average density of the observable universe is higher than the density of a black hole the size of the observable universe so technically we should be in one.

      Technically this doesn’t have to affect anything, larger black holes can have gentler gravity gradients and nothing in physics actually demands all the mass inside be concentrated at a miniscule central point, it just works out that way for black holes of the size we’ve seen so far. So the entire universe could be a black hole (assuming its finite) with the event horizon just being functionally inacessable and the black hole so large that internal conditions aren’t really influenced in any way.

      • Soggy@lemmy.worldEnglish
        6·
        18 hours ago

        Surely at some point it stops being useful to apply the same terminology to such vastly different concepts. If the universe is a black hole and Sagittarius A* is a black hole then “black hole” doesn’t communicate anything effectively outside of extremely niche astrophysics conversations.

        • CheeseNoodle@lemmy.world
          2·
          8 hours ago

          It could totally have happened already and we just don’t notice, though there’s kind of a critical size where a black hole just gets infinitely big as adsorbing a stray hydrogen atom in the vacuum of space increases its radius enough to encompass multiple new hydrogen atoms and the whole thing just expands to encompass the entire universe. Kind of when everything is a black hole then nothing is a black hole sorta situation.