Question

Black Hole has such a huge gravity, impacting space and matter in its vicinity the way that velocity reaches infinity, thus the time is close to zero, why or why not?

include a short description of the Black Hole (how it forms, its characteristics after it forms and the definition of the Event Horizon. Perhaps you can also come up with a live example, which would help to explain the processes happening around the black hole.

Answer 1

This has been one of the most fascinating and unsolved mysteries of the universe; A question that stumped scientists for years after they hypothesized the existence of black holes, and there was really no way to study them. Just as light becomes trapped in a black hole, so too do X-Rays and Electromagnetic Radiation - the signals that modern telescopes detect to "see" the universe. However, after several years, scientists have discovered that it is possible to locate black holes indirectly: by observing the X-ray signals that were being emitted by the matter destroyed by the tidal stress caused by the black hole's gravity.

It's difficult to know what happens on the other side of a black hole, since no information can cross back through the event horizon. The accepted theory is that near the center of every black hole lies a ‘singularity’ - or a point where the density - and therefore the curvature of space-time also - reaches infinity. In other words, all the mass contained in zero volume. As regards what happens to matter inside a black hole, we can only use our imagination, and scientists have thought about every scenario that is even remotely possible.

Any mass which crosses the event horizon will accelerate inwards towards the singularity. When it is approaching it, it will experience tremendous tidal stress. Because the singularity contains huge mass - anywhere from one supergiant star to several million of them - and is infinitely dense, the end of the object which is closer to the singularity will experience significantly more gravitational force than the end facing away. This will manifest itself as a gradually increasing stretching of the mass, something colloquially referred to as "spaghettification."

The falling mass will reach the singularity and become part of it in finite time in the reference frame of the mass. To an outside observer, things are different due to the relativistic effects of such a strong gravitational field. Beyond the event horizon, time is essentially frozen, so to anyone watching the black hole, nothing ever happens inside it. So if an object starts to get close to it and fall in, it will gradually slow down and turn red (the light is red-shifted) and never cross the horizon. The light will get more and more red-shifted until it is infrared, microwaves, radio waves, etc--until it totally disappears. But it appears to never cross the horizon. The object itself will cross the horizon normally, however it will still always look like it hasn't crossed the horizon--because all light is rushing down towards the singularity, and none can come back the other way, it will always appear that the horizon is just beyond reach.

There are no theories about what happens to anything inside a black hole, that there are only hypothesis.

It is thought that the matter that goes into a black hole gets crushed into a tiny point at the center called a "singularity". That's the only place that matter is, so if an object were to fall into a black hole it wouldn't hit a surface as it would with a normal star. Once it's there, it's there. Scientists believe, nothing would survive going into a black hole. People sometimes talk about "wormholes" as portals to other universes, but it is now thought to be very likely that these can't exist at all.

Other than that, we can only use our imagination. Whatever you can dream up might happen to stuff in the center of a black hole, some physicist has probably thought of it and tried to determine its feasibility.