What is a black hole?
Absolutely improbable concept - a black hole,was described and published by Einstein, in his theory of relativity. Only recently scientists have received more or less reliable evidence of the existence of black holes. What is a black hole? This is a heavenly body with certain properties.
- It is small - the diameter of a black hole is about 20 kilometers (although it is believed that there are similar objects and larger ones)
- Very dense. Its density is inversely proportional to the size, than the hole is larger - the less its density
- A black hole does not reflect light, because its attraction is so great that even photons of light can not leave it. Therefore, you can not see it
- This object draws in itself everything that approaches it at a critical distance
To develop and describe the properties of a black holefurther, we should use the basic postulates of the general theory of relativity. According to her, each body pushes, crumples the space around itself. Since the black hole has just a huge mass, it, like a heavy ball on a soft and elastic surface, falling through, forms a pit. So, the heavier this ball, the smaller will be the outer diameter of this pit, which sooner or later will close its edges. Thus, it will cease to exist, that is, be visible from the outside.
Since people can not see a black hole, they determine its presence by indirect signs. For example, the strength of gravity near it and the special properties of matter, which is in contact with it.
What's inside the black hole
Not seeing the object itself, it is even more difficult to say thatis inside it. If we set aside the crazy and fantastic theories that the black hole warps time and juggles the captured objects in time, then it only needs to remember that we talked about it earlier. The word "hole" does not quite represent the essence of the object. After all, in fact, this body, superdense matter.
Once upon a time, a black hole was a star thatHas exhausted the stock of fuel and as a result of a collapse has compressed in a point. So many physicists and astrophysicists believe. According to this theory, in the center of the black hole there is an area in which all the matter of the former star is destroyed. This region is called a singularity. But there is also an area surrounding this point, it is limited by the horizon of events. If a space object hits the horizon of events, it will not be able to return.
We can not get the information that isinside the black hole, because if you can get into it, you can not go back. That is why this "black" definition of this cosmic object was obtained. Scientists until now have not been able to come to a common solution, what is a black hole. That is, there are several directions of physical inferences that rely on circumstantial facts.
Studies of black holes, mainly, thisThe study of how the cosmic bodies moving in the zone of their action move and change. All the rest is just conjectures and theories that can not be proved and verified.