Did a hyper-black hole spawn the Universe?

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Big Bang was mirage from collapsing higher-dimensional star, theorists propose.

It could be time to bid the Big Bang bye-bye. Cosmologists have speculated that the Universe formed from the debris ejected when a four-dimensional star collapsed into a black hole — a scenario that would help to explain why the cosmos seems to be so uniform in all directions.

The standard Big Bang model tells us that the Universe exploded out of an infinitely dense point, or singularity. But nobody knows what would have triggered this outburst: the known laws of physics cannot tell us what happened at that moment.

“For all physicists know, dragons could have come flying out of the singularity,” says Niayesh Afshordi, an astrophysicist at the Perimeter Institute for Theoretical Physics in Waterloo, Canada.

It is also difficult to explain how a violent Big Bang would have left behind a Universe that has an almost completely uniform temperature, because there does not seem to have been enough time since the birth of the cosmos for it to have reached temperature equilibrium.

Written By: Zeeya Merali
continue to source article at nature.com

12 COMMENTS

  1. Taken from the OP:- “The standard Big Bang model tells us that the Universe exploded out of an infinitely dense point, or singularity…”

    I don’t think so ~ nature abhors an infinity. Classical GR breaks down at the time before the Universe reached the Planck temperature, time & distance. I think the BB model makes sense AFTER approx 10^-44 of a second, but to claim a physical infinity at the limit t=0 is absurd.

  2. Of course, if our universe is the event horizon of a 4 dimensional black hole, then the question is, is the universe of that 4 dimensional black hole the event horizon of a 5 dimensional black hole, and is that one’s universe in a 6 dimensional black hole, etc? Black holes all the say up?

    • In reply to #2 by SelfAwarePatterns:

      Of course, if our universe is the event horizon of a 4 dimensional black hole, then the question is, is the universe of that 4 dimensional black hole the event horizon of a 5 dimensional black hole, and is that one’s universe in a 6 dimensional black hole, etc? Black holes all the say up?

      If the 4-D star’s home universe was also highly uniform, any physicists living there (not that they easily could, but that’s another story) might repeat the argument. But no such uniformity is to be expected yet.

    • One black hole, all the way down…?

      In reply to #2 by SelfAwarePatterns:

      Of course, if our universe is the event horizon of a 4 dimensional black hole, then the question is, is the universe of that 4 dimensional black hole the event horizon of a 5 dimensional black hole, and is that one’s universe in a 6 dimensional black hole, etc? Black holes all the say up?

  3. Thank you. About time someone suggested this. I’ve been saying it for decades and I’m pig ignorant. I’ve actually made posts on this site suggesting it. Assuming it’s right, if not, I never said a thing.

  4. I like the part about the Big Bang being a mirage. So things “look like” they emerged from a singularity, but that’s just an (optical?) illusion. As for the rest of it, yes it opens the way to an infinite regress. But, hey, what doesn’t?

    Yes, I know, “liking” something doesn’t make it any more (or less) likely.

    Afterthought: calling these concepts “branes”, as in (mem)branes, isn’t intuitive, especially when they go all multidimensional. I propose we call them Turtles.

    • It reminds of the theory that our reality is more like a computer simulation.

      In reply to #6 by OHooligan:

      I like the part about the Big Bang being a mirage. So things “look like” they emerged from a singularity, but that’s just an (optical?) illusion. As for the rest of it, yes it opens the way to an infinite regress. But, hey, what doesn’t?

      Yes, I know, “liking” something doesn’t make it any more…

  5. But nobody knows what would have triggered this outburst: the known laws of physics cannot tell us what happened at that moment.

    There are various theories and hypotheses:
    http://hyperphysics.phy-astr.gsu.edu/hbase/astro/planck.html

    But inside a black-hole event horizon we don’t know if there are other event horizons or other forms of physics as yet undiscovered.

    Similarly there are backward projections to a singularity in the big-bang, but we really don’t know the details.

  6. Here’s what I find confusing about this most of all. Why can’t it be both exactly? Most of the ‘Big Bang Theory’ would still be accurate, and it’s not like it doesn’t have different formulations. Last time I checked it didn’t require a strict singularity, and for all we know black holes make something that is similar to a singularity. I guess they have to write it up this way though, even though it bugs me to no end. And we wonder why people don’t get that scientific theories are rarely invalidated wholesale, but are instead demonstrated to be incomplete.

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