Monday , December 6 2021

What are white holes and why their existence is controversial – BBC News



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The universe can act as a huge Ying Yang.

It sounds mysterious, but in reality it's a good way to understand what the relationship between the known black holes and their brothers less known white holes.

From black holes we have news almost daily and there is evidence of how they are formed and how they behave. It is said, however, about the twins that apparently follow them and who behave like them … but in opposite direction.

"A black hole is a place you can come in but you can never get away," says physicist Sean Carroll, from the California Institute of Technology, in an article on the Nova portal. "A white hole is a place where you can go out but to which you can never go back".

White holes are the exact equivalent of black holes. Instead of swallowing everything that comes close to them, it's constant expel and reject the question as reaching its boundaries.

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The white holes help us understand the mysteries of the universe.

Thus, it is easy to understand which white holes, but they only have a small problem: We do not know if there is beyond the boards of mathematics.

That's why they are controversial: could there be anything going on counter of the laws of physics?

The two sides of the same coin

Currently there are only white holes in calculations by physicists and astronomers, as black holes once were.

"White holes are theoretical models like complement to black holes, "says physicist Edward Larrañaga, professor at the National Astronomical Observatory of Colombia, BBC Mundo.

"When performing the mathematical operations of the equations he raised Einstein it results in a white hole, "explains Larrañaga," but we still do not know any physical process that results in a white hole being generated. "

Albert Einstein
Einstein's equations result in white holes.

Make sure there is a white hole would mean checking the phenomenon that currently seems impossible, for example negative gravity which causes things to fall up or that time is interrupted or reversed.

But the fact that they seem impossible does not mean researchers discard of all its existence.

"The reason to suspect that there are white holes is that they could solve a mystery: What happens in the middle of a black hole, "he wrote recently on the portal New Scientist physicist Marco Rovelli, from the Center for Theoretical Physics in Marseille, France.

"We see large amounts of matter sprouting around the black holes and falling in. All this goes over the surface of the hole, the" horizon "or no return, falling down and then? Nobody knows. "

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Currently there are only white holes in mathematical calculations.

The conclusion is the key for some theorists to claim that the bottom of a black hole can be connected to a white hole by one "Wormhole".

"Theoretically you can get into the black hole, walk through the wormhole and go out through the white hole," explains Larrañaga. "But the physical conditions there are so extreme, gravity is so strong that you should end up crushed before you pass the wormhole. "

According to experts, the white holes can be the same black hole but in the future, or be a source of the so-called "dark energy", which is what makes the universe expand, but in general these mysterious mathematical volcanoes currently exclude more questions than answers.

So far no one has seen them, but as Rovelli writes, "the sky could be full of white holes ".


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