What are Black Holes?

Black holes are the most popular and most curious one thing in our universe.
What are Black holes


In universe some incidents can understand to our brain, and they can explain in science. To explain that cases, experts or scientist may use some laws, arguments and etc...
In that explanation they may justice for some cases. So, in this blog today we talk about Black Holes.
In 1961 German physicist and astronomer Karl Schwarzschild   gave the first explanation about Black holes. In that explanation he used Albert Einstein's relativity theory and by calculating and showed that any object given the right amount of thrust can become a black hole.
Black holes are not simply can learn object., let's try to understand this amazing topic in simple way. A black hole is simply an object where a large mass is squeezed into a small area. Actually, this can be described as a collection of several very small masses rather than a cavity. 
According to scientist the real reason for extreme gravity of black hole is the curvature of space and time. All Black holes have main parts of it. The boundary part of the black hole is called Event horizon. To Travel through this event horizon, any object has to travel at a speed greater than the speed of light, in other words, it is impossible. Yes, it can't do it. In the advance of science, it can be possible but it's not possible for next 20 or 100 years. Due to this reason, it is difficult for us as well as scientist to observe black holes. Because of the extreme gravity of black holes, even light cannot escape from them. 
After some years 1971 dispelling the myths about black holes scientists found first ever black hole. Cygnus X-1 is the first black hole they found. After some research scientists found that there are various size black holes in universe. There are three different sizes of black holes. Some black holes are small, some are medium, and some are extremely big. The biggest Black hole ever discovered so far is S50014+81, which is more than 40 billion times the mass of our sun.
                                                                       S50014+81

According to scientist, there are billions of years old massive black holes in the middle of every galaxy, and so there is a black hole in the middle of Milky way galaxy, which is our galaxy. It is called Sagittarius A.     
Your Astronomer Sagittarius A
                                                               Sagittarius A
 
Let's talk about what I think these black holes actually are (this is my personal opinions only); So, there are two options what I think black holes really are,
1. They are cosmic gates connecting galaxies - As in interstellar movie shows it can be cosmic gates that connects to other galaxies. We know it takes billions of years to go to other galaxies and some other planets. If this opinion become true and the advance of our future technology, we can easily and faster and we can discover new things that we don't discover yet.
2. So, the second option is it's a big black giant hole that swallows everything. 
 With what scientists have found so far, they are more weight to second option but some day we discover more and more things about black holes, and we can describe what black holes really are. 
So, my astronomers I hope this explanation is really helpful for you. So, stay tune for another blog like this and we can discuss about how we can see it. So, astronomers' comment what you think Black holes really are.

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