Goodbye, Big Bang. Hello, black hole?
Could the famous big bang theory need to be revised? A group of theoretical physicists suggests that the birth of the universe could have occurred as a result of a four-dimensional star collapsing into a black hole and throwing its debris.
Before plunging into work, let's agree: no one knows for sure. People were definitely not where it all began. Standard theory says that the universe came from an infinitely dense point or singularity, but who knows what it was before the Big Bang?
“To the attention of physicists, dragons could fly out of a singularity,” said Nyaesh Efshord, an astrophysicist at the Perimeter Institute for Theoretical Physics in Canada, co-author of the new study.
What are the problems of the Big Bang theory? First, the singularity, of course. Secondly, it is difficult to say why the universe appeared as a result, which has almost the same temperature throughout its length, because the age of the universe (about 13.8 billion years) is not enough, as far as we can judge, to achieve temperature equilibrium.
Most cosmologists say that the universe had to expand faster than the speed of light for this to be possible, but Ashford says that this theory also has problems: “The big bang was so chaotic that it was not clear whether there was at least a minimal message to for inflation to start working. ”
That's what physicists offer.
The model they built represents a three-dimensional universe floating in a membrane (or brane) in a superverse, which has four dimensions. Yes, from such a concept, your head can get sick, so it’s better to think of a brane as a two-dimensional space, and of a superverse, as a three-dimensional one.
Thus, if a superuniverse carries four-dimensional stars in itself, these stars can go through the same life cycle as three-dimensional ones known to us. The most massive of them will explode like supernovae, losing their flesh and collapsing into themselves in the form of black holes.
A 4D black hole would have an “event horizon,” like 3D, already known to us. The event horizon would be the boundary between the inside and outside of the black hole. There are a lot of theories about what happens inside a black hole, although none of this has ever been observed.
In a 3D universe, the event horizon would be displayed as a two-dimensional surface. Thus, in a 4D universe, the event horizon would be a three-dimensional object called the hypersphere.
In short, it follows from the model that when 4D stars explode, the remaining material can create 3D branes that surround 3D event horizons and then expand. That's how it was.