A black hole is a region of space where the pushing force of gravity is so strong that light can not escape. The gravity is so strong that the matter has been pressed into a small space. This compression can result in the end of life of a star. The result of his death may cause a black hole.
|Because light can not escape them, they are invisible to the human eye. However, space telescopes that contain special instruments can observe the behavior of the material and stars that are close to this region.|
How big are black holes?
Black holes may have a wide range of sizes, but mainly there are three types. Its mass and size determine what type belongs to which.
- The smallest type is known as a ” black hole paramount “. Scientists believe that this type of black hole is as small as a single atom, but has the mass of a mountain.
- The most common type has a medium size and is known as ” stellar “. The mass of a stellar black hole may be up to 20 times the mass of the sun and can fit within it a ball with a diameter of about 10 miles. Dozens of stellar black holes may exist within the Milky Way galaxy.
- The largest black holes are known as ” super massive “. This hole types have more than 1 million suns combined mass and may contain inside a ball with a diameter the size of the solar system.
|Scientific evidence suggests that every large galaxy contains at its core a supermassive black hole. That is in the center of the Milky Way known as Sagittarius A. It has a mass equal to about 4 million suns, and may contain inside a ball with a diameter the size of the sun.|
How do black holes form?
It is thought that the primordial black holes were formed in the early universe just after the big bang. While stellar black holes form when the center of a very massive star collapses on itself. This also causes a collapse of the supernova, or exploding star, throwing part of the star into space.
Scientists believe that supermassive black holes formed at the same time as the galaxy in which they find themselves. The size of this is related to the size and mass of the same galaxy.
5 interesting facts about black holes
1. You can not directly see the black hole.
Because it is “black” – the light can not escape it – it is impossible for us to perceive the hole directly through our instruments, regardless of what type of electromagnetic radiation we use (light, X-rays, anyway).
The key is to observe the effects of the hole in the nearby environment, says NASA. For example, you can display what happens to a star that is too close to a black hole. This begins to naturally attract it and tear it to pieces. When the matter of the star begins to leak into the black hole, it gets faster, hotter and glows in X-rays
2. Dying stars create stellar black holes
Say you have a star about 20 times more massive than the sun. Our Sun will end its life quickly; when its nuclear fuel burns to end, it gradually fade to become what is known as a white dwarf.
The big stars are fading that may eventually lead to a new black hole
However, this is not what happens to the most massive stars. When these monsters are out of fuel, gravity overwhelm the natural pressure that keeps the star to maintain its stable form. When the pressure of nuclear reactions collapses, according to the Space Telescope Science Institute, gravity collapses violently crushes and forms the core, while other layers are blown away; this is known as a supernova. The core remaining collapses into a singularity – a point of infinite density with virtually no volume. This is another name that can meet a black hole.
3. The nearest black hole probably is 1,600 light years.
An erroneous measurement Sagitarii V4641 which led to a series of media reports in which it was said that the closest to Earth black hole was surprisingly close, only 1,600 light-years. Not close enough to be considered dangerous, but more than had been thought.
However, further research has shown that the closest black hole is probably further from this. Given the rotation of its companion star, and other factors, the result of 2014 is that the closest is over 20,000 light years.
4. Black holes are only dangerous if you are too close to them.
Black holes are only dangerous if you are located near them
As reptiles are in a cage, if you look at black holes outside their horizon – think its gravitational field and in that of a planet -Nothing would happen. This area is the point of no return, when you’re too close to it you do not have any chance of rescue. However, if you observe from a far, you are in a safe place. Therefore, this means that it is probably impossible for a black hole can get to eat everything in the universe.
5. We are not sure if there are wormholes.
A popular science fiction theme is about what happens if a body falls into a black hole. Some people believe that these objects are like a small wormhole leading to other parts of the universe, traveling faster than light.
Scientists do not know for sure all structures of spacetime
However, according to Abi Loeb, professional Harvard-Smithsonian Center for Astrohysics, ” we do not have a theory that unifies reliably general relativity with quantum mechanics, we do not know all possible structures of spacetime that could accommodate the worm holes. ”
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