science books tell us that black holes are real
if then , where is it and what actually is it ??

TUT317

Yes, there is very strong scientific evidence that Black Holes exist. They are hard to detect because their gravitational field is so strong that light cannot escape. This is why they appear black. Good evidence can be found for a black hole if it happens to be near a companion star.
One can see matter being drawn off the companion and large amounts of radiation being created.
There is no ONE BLACK HOLE. It would be impossible to know how many black holes actually exist because they are hard to detect. There is also the fact that they are being created and according to Hawking, evaporating.

There is probably a Black Hole at the centre of our Galaxy and there is another one in the vicinity of the Large Magellanic Cloud

jinxprotocol

TUT317 is spot-on.

Black holes happen to occur when a star - a star much bigger than, say, our own sun - collapses. It collapses because the gravitational force is stronger than the weakening counterbalancing energy/nuclear output, which causes an implosion of immense proportions.

See, stars have only enough energy to last for a limited period of time, sometimes only hundreds of millions of years. After the star has expended all of its energy, it implodes in on itself.

mathwiz3502

But here is a really hard concept to grasp.
There is evidence suggesting that there are decillions of black holes on Earth right now.
Luckilly, they are reallly, really small.

TUT317

I have to admit I'm not aware of that theory. If they are really tiny then they would probably evaporate very quickly.

Have you got any more info on tiny black holes? I do remember something about the Large Hadron Collider and the possibility of it creating tiny black holes

mathwiz3502

This theory is still being explored, even today.
I would either google or watch the history channel.

lisahall

Black holes might not exist - or at least not as scientists have imagined, cloaked by an impenetrable "event horizon". A controversial new calculation could abolish the horizon, and so solve a troubling paradox in physics.
The event horizon is supposed to mark a boundary beyond which nothing can escape a black hole's gravity. According to the general theory of relativity, even light is trapped inside the horizon, and no information about what fell into the hole can ever escape. Information seems to have fallen out of the universe.
One possibility researchers have proposed in the past is that the information does leak back out again slowly. It may be encoded in a hypothetical flow of particles called Hawking radiation, which is thought to result from the black holes' event horizons messing with the quantum froth that is ever-present in space.The theory of black hole is given in a flash card presentation and information on few sites which makes it easy to understand it better, e.g: Examville - Live Classes Online | GMAT GRE SAT LSAT Free Tests Online | Homework Help | Online Courses | Math Help | Literature Study Guides | Post Questions, Science news and science jobs from New Scientist - New Scientist, Black hole - Wikipedia, the free encyclopedia.