Is our Universe the Inside of a Black Hole?
The last couple of weeks has seen some interesting research and comentary on this proposal: The JWST has revealed that the vast majority of early galaxies are rotating in the same direction, whereas a random “Big Bang” would produce 50/50 directionalism – this asymmetry would be compatible with the universe being the inside of a rotating black hole. This is the “bounce” theory where all the matter inside a black hole converges in toward the centre but cannot form a singularity so then bounces/inflates outward again – effectively being the Big Bang of that Universe. Thus each black hole is our universe is the container of another smaller universe and so on. There is an implication here that there would be smaller and smaller universes as we dig down, although now there is a theory that “Extremely strong gravitational forces near this state cause an intense particle production, increasing the mass inside a black hole by many orders of magnitude and strengthening gravitational repulsion that powers the bounce.” (Poplawski). So he is suggesting that the mass inside the black hole could be vastly increased during the bounce. This theory does away with some of the unexplained issues in physics such as cause-of-inflation, dark energy etc. It also predicts a slight curvature to the universe rather than flat spacetime – so the thoery may be testable.
What fascinates me most about this idea is that because time dilation tends toward infinity at the event horizon of a black hole, matter moves slower and slower toward the event horizon, such that no black hole actually gets to form within the timeline of the parent universe – the matter just piles up as a shell on the horizon until infinite time has passed in the parent universe. Thus time in the baby universe does not start until after infinite time has passed in its parent universe. Mind-bending stuff!!
