Black holes and the shape of the universe are the things that are causing discussion. The black hole is the place where time travels backward because energy travels to the center of the black hole. The black hole is in the middle of the whirl of the material. And that means the whirl continues its movement behind the event horizon. So the spiral shape whirl that we see in galaxies continues its travel in the form of a spiral inside the black hole.
So the black holes would be the brilliant place for the anti-universe where time moves backward. But there is one requirement. And that thing is that the material can have the shape of order. The material cannot form in chaos. But material always attempts to reach the order.
And there is a small possibility that the whirl inside the black hole forms the other universes. The fact is that that other universe would be the place where the energy that travels to the center of the black hole keeps material young until the black hole is vaporized.
The shape of the universe determines the ultimate fate of the universe. If the shape of the universe is a ball or spheric. It's closed. And it faces its fate in Big Crunch. Otherwise, the fate of the universe is big silence.
The universe's geometrical shape is important when we try to think about its ultimate fate. The ball-shaped universe is the only possibility that the end of the universe will be the Big Crash. If that thing is possible the phoenix universe is true. Only if the universe is positive curvature it's closed.
If Ω = 1, the universe is flat.
If Ω > 1, there is positive curvature or spheric or ball-shaped
If Ω < 1 there is negative curvature in the universe.
The fact is that the black hole is like a universe inside the universe. That thing means that the black hole is like the spheric universe inside a larger universe. So, the universe has the matryoshka model. There might be internal structures inside the larger structure that we call the universe that we cannot ever see.
So did the universe begin its life as the flat universe and then it would take the hyperbolic shape and when the energy level of the universe decreases enough the universe will get the shape of a sphere.
The local geometry of the universe is determined by whether the density parameter Ω is greater than, less than, or equal to 1.
The local geometry of the universe is determined by whether the density parameter Ω is greater than, less than, or equal to 1.
Image above: From top to bottom: a spherical universe with Ω > 1, a hyperbolic universe with Ω < 1, and a flat universe with Ω = 1. These depictions of two-dimensional surfaces are merely easily visualizable analogs to the 3-dimensional structure of (local) space. (Wikipedia, Shape of the universe)
If we think that the geometry of the universe is stable. That requires that the relativity between energy levels in space, material, and gravitation is stable. But we can speculate the possibility that the universe began its career as a quantum system in which energy level was extremely high. But when the energy level relativity to gravitational force decreases.
That thing means that gravitation starts to win. That means the advancement of the universe might consist of all three possible shapes. The beginning of the universe was a layer-shaped structure but when the universe is cooling or its energy level is decreasing it turns ball-shaped.
The universe loses lots of energy outside it. The wave movement and the most out particles of the universe should travel faster than they would travel inside the universe. But practically things like gravitation affect those things. Anyway, the universe loses energy and material all the time to the emptiness that is surrounding it. But also radiation inside the universe turns weaker. And that affects the relation between gravitation the mass of the universe, and energy.
The hypothetical gravitational hill in the middle of a flat universe can pull the flat universe to spherical form. And it's possible, that this thing can happen through the hyperbolic universe. So are those three possible geometrical shapes of the universe also the shapes that are following each other in the history of the universe?
One of the most interesting models there is a large "pothole" or "hill" in the middle of the layer-shaped universe. So when the radiation that is released when the universe is expanding turns too weak that gravitational point will pull the universe to the spheric shape.
The origin of the idea of the gravitational hill is coming from the Big Bang theory. The part of the material that was released in the Big Bang fell back into the giant black hole. When the power of the energy that expands the universe is decreasing to a level that is low enough. That giant black hole would pull the outer core of the universe to the spheric form.
The existence of that black hole is purely hypothetical. But when the material was released from the Big Bang. The energy level of that explosion was extremely high. But it was quite similar to a supernova explosion.
There was one difference between supernovas and the big bang. In the young universe was no quantum field outside that expanding quantum bubble. But energy travels also backward in the expanding quark-gluon plasma. And that energy could form a black hole.
That black hole will pull more particles into it. And it expanded. Until there was formed another black hole. That can make superpositions with it. That thing was the beginning of the forming of the universe.
https://en.wikipedia.org/wiki/Shape_of_the_universe
https://en.wikipedia.org/wiki/Ultimate_fate_of_the_universe
