What has been determined is at the center of a celestial body such as a "black Hole"?

It wasn't Hawking who came up with the theory, but at the core of a black hole is a body of super dense matter wherein even the space between the nucleus of an atom and its electrons has been compressed into nothingness.

Imagine all the matter that composes a large cruise ship occupying a space less than the size of a tear-drop.

All still theory, though the evidence has gotten pretty convincing over the last 60 years.

It wasn't Hawking that first wrote what we now think is inside black holes. It was Karl Schwarzschild, although John Michell was the first to theorize it. http://archive.ncsa.uiuc.edu/Cyberia/NumRel/BlackH...

It is a singularity. An infinitely dense 0-dimensional pinhead of matter with a mass several times larger than the sun. Its not like ultra-dense matter like is in neutron stars: the actual size of the singularity that is at the heart of the event horizon is zero.

Singularities were once stars that ran out of hydrogen to power the fusion reactions that kept them from collapsing under their own weight. The gravity is so strong that even light cannot escape. However, Schwarzschild didn't look inside the hole, he just used math and guesswork. No one really knows what is on the other side of an event horizon, and because nothing useful ever comes out of the horizon no one will ever know for sure.

A singluarity exists at the "center" of a black hole. Singularity is defined (if i remember correctly, and in this instance) as a point where known laws of physics and mathematics cease to function. In reality, the event horizon of a black hole (the distance from the singularity at which the gravity from it = the speed of light (no light can escape, but just barely) keeps us from being able to observe exactly what is going on. But think of it this way. Squeeze about 500 suns into the space about the size of a head of a pin.

The characteristic of a black hole is that it is so dense that no information can be transmitted from within its event horizon and reach the universe outside the event horizon. Therefore, we have no way of knowing exactly what is inside a black hole, except a given amount of matter. In any case, the matter is so dense that it is probably just a collection of quarks and leptons with no overarching structure.

If I remember correctly, when a star goes super nova it then collapses into a dwarf star. The star is extremely small and its matter is very dense. Because of this density, it has a high gravitational pull on objects, including light. I believe this is why the area around this star appears to be black; light passing near this object can't bounce off and back to the eye to be seen. It is absorbed by star, thus appearing to be a 'black hole.' That is, of course, if I remember correctly.

Very good answers before mine!

I want just to say something more.

There is no center in a black hole, there is not even

geometry inside a black hole.

The "near Euclidean" geometry of the Universe

collapses when you pass the border of a black hole.

think of a sprint a black hollow has an infinity mass ,that would desire to produce gravity it is from 5 to one hundred easy years for the era of. If it have been theory to be there each thing around it would be sucked in very as we talk. the only place i see the end results of this manner of extensive gravity properly is interior the midst of a galaxy.

Black holes are simply giant stars with giant gravity and they are in the center of every galaxy.

WE don't know!