There are many black holes in the universe, which can devour all the celestial bodies in the universe and emit countless rays outward.
Hundreds of years ago, no one would have believed that such things existed in the universe, but now astronomers are observing and measuring them. So far, scientists have not fully demystified black holes.
Many children ask adults: Where did the objects that were swallowed by black holes go? Is it another universe? Or the so-called "parallel space-time"? Are black holes "bottomless pits"?
In fact, this is a question that even scientists cannot answer.
Einstein's theory pointed out that after being swallowed by a black hole, these celestial bodies will move faster and faster, moving all the way to the center of the black hole, but what about after reaching the center? People don't know, even the great Einstein did not answer this question, did these celestial bodies melt like winter ice?
We can observe the process of black holes devouring celestial bodies through telescopes, and we can also observe how these devoured celestial bodies travel to the center of the black hole, and we also know what black holes are theoretically made of.
Unfortunately, we just don't know where these objects that travel to the center of the black hole end up and what they become.
Still, scientists have come up with a possible conjecture.
Carlo Rovelli, an Italian theoretical physicist, writes that he and his colleagues are exploring a seemingly simpler and more plausible possibility: The objects began to slow down before reaching the black hole and eventually stopped moving, like a glass ball smashed on the ground and "bouncing."
Roveli believes that objects swallowed by black holes are subjected to a huge pressure to be "pushed out", which is similar to the pressure that prevents electrons from falling into atoms, which is essentially a quantum phenomenon.
If Rovelli's conjecture is true, then why have we only seen black holes devouring celestial bodies, but not black holes "bouncing" celestial bodies?
This may have something to do with the relativity of time. Time doesn't pass at the same rate everywhere, and because the gravitational pull of a black hole is so strong, the passage of time in a black hole also slows down. Therefore, the black holes we see seem to be "frozen", and it may take a long time to see these celestial bodies "bounced" out by the black hole.
Another theory is that the matter entering the black hole eventually falls apart into zero-dimensional particles, flows to the center of the black hole, and eventually merges with the original zero-dimensional particles in the singularity. They may converge into a point, they may converge into a one-dimensional ring structure, constantly rotating, but they will never be three-dimensional structures, that is, they are no longer matter.