 # The similarity of our universe

## Found at: gopher.erb.pw:70/roman/phlog/421.txt

```The similarity of our universe to a black hole
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```1. The universe is expanding, but, in turn, black holes can also
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```grow rather quickly in size due to the absorption of mass.
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```2. Nobody knows where the border of the Universe is - we know
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```only about cosmological horizon. The border of the universe has
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```never been seen, and can we ever get to it? The limits of the
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```black hole, the event horizon, no one and nothing can leave, not
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```even the light.
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```3. Another interesting point - in the center of the black hole there
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```is a singularity, which is a point in space-time, where the density
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```of matter is so high that the laws of physics that are familiar to
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```us no longer work in it. The same singularity is also present in
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```the cosmological model of the Universe - in the Big Bang Theory.
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```4. Among the similarities there is also spherical symmetry, in
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```which, if an object is inside a black hole, then wherever it looks,
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```it will be the same everywhere - there is only a black hole around.
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```In the Universe, too, at sufficiently large distances, wherever you
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```look, all is the same everywhere.
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```5. Scientists have noticed that the Schwarzschild radius for the
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```observable universe coincides with the radius of the black hole
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```event horizon. The essence of this statement is that if an object
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```with a certain mass is less than the Schwarzschild radius for this
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```mass, then it will be a black hole. For example, if you calculate
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```such a radius for the Earth, then, in order for the Earth to turn
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```into a black hole, it is necessary that this radius is slightly less
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```than a centimeter. The logic is that the radius of the observable
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```Universe and its mass are such that it should be a black hole, by
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```analogy with the fact that our planet was one and a half centimeters
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```in diameter. Our world and the black holes themselves are
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```described mathematically by the same Einstein equations, maybe
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```this is just a coincidence?
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```Hypothesis (https://bit.ly/3E7Y9QF). A particularly interesting
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```version is that each black hole contains its own universe, and they
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```all exist like a bubble in a bubble, and parallel worlds, possibly
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```very close to us. Matter from one universe is absorbed, drawn into
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```another, and there, in a parallel universe, it seems to them that
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```scientists are seeing some kind of Big Bang - the Big Rebound,
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```which may be the cause of the expanding universe. It turns out
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```that everything in the world is cyclical. One state passes into
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```another, and our Universe was born in the same way.
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