Black Holes
Black Hole has become one of the most important problems nowadays. People from all over the world are preoccupied by this problem. It is also called Collapsar.
Collapsar in a zone in time and space, gravitational attraction of which is so strong that even objects that move with the speed of light can't get out of it. Later Collapsar was named "collapsed stars" or "frozen stars".
The existence of Black Holes is the result of theory of gravitation. And if they don't exist then the whole theory of gravitation is wrong. Besides, an object that doesn't fully correspond given definition may be also called Collapsar. The surface of Collapsar is supposed to be similar to membrane, and all the objects pass freely through it but then can't exit it. All kinds of objects may get into Collapsar, dust, gas and even stars.
The existence of Black Holes is the result of theory made by Einstein.
The object that gets into Collapsar gets very hot and turns into a strong source of energy. And this energy may be watched from the Earth and helps to astronomers to find Collapsar. But this Collapsar is considered to be potential and no Collapsar was found till nowadays.
The problem that worries a lot of people nowadays is that our planet can get into Collapsar. Some people say that human activity can cause the appearance of Black Hole that will damage our planet.
Besides, there are a lot of films and movies that describe us the catastrophes and the phenomenon of Black Holes that will damage our planet and humanity. Recent investigations and experiments of hadron collider made this problem extremely important. According to one of films, scientists put experiments using collider and the Black Holes appeared. People are afraid of the same situation that may happen.