Note

To understand the full article, please first have look at the analysis of the book- Black Holes by Stephen Hawking which can be found here.
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“Black holes” this word is a mystery of its kind. It has got a lot of irony in itself! Though, it is black but not pure black. Neither it is a hole. This huge piece of matter is easy to think of but is hard to find out one in the space. Till now, it is the scientific fact that even outcasts fiction. In this article, I will dig deep into the concept of the black hole, (See the irony? It is accepted worldwide but still I make it just a concept) and make everything clear about those little singularities is in the universe.

What is a black hole?

Black Hole

To spell the phase black hole is very easy, but to mean it is very difficult. I mean, to find one in space is very difficult because they suck in everything that crosses their Event Horizon. They don’t even let light escape from them, so they appear black. Since the speed of light is the ultimate speed attained by anything or observed till now, it means if the light even can’t escape, nothing has the escape velocity equivalent to get out of a hole. But how do they get search power?


To Explain on the outlines, when a star of at least 1.5 times the size of the Sun collapses on itself, its wings to a very small size causing a Supernova. But the mass is still constant and about 1.5 times the size of the Sun, so the density increases to infinite. As mass is the same the gravitational pull becomes infinite.

How are Black holes are formed?

Black Holes are formed when stars of about 1.5 times the size of our sun collapse under the gravitational pull of themselves. This is the result of a supernova.

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How stars burst and collapse?

When a star has used up its nuclear fuel, it first starts to expand as the last few moles of fuel released has enough energy to overcome its own gravitational pull. But this does not continue for long. When the energy is used up, gravitation takes the lead. Now, contraction occurs and there is an explosion that releases a bit of the mass and the used up fuel of the star. The blast causes what we know as a supernova. What is left after the completion of the burst, it is a black hole.

Are Black holes actually black?

Blackhole is not actually black!

What seems from the name black hole is that they are completely black. Yes, it is, they are black- neither wholly nor partly. What I mean is that the singularity- up to the Event Horizon is purely black. What I mean is, as I told in the analysis of the book- Black Holes by Stephen Hawking, that to assume a black hole in the space, we can paint a ball fully black ok and hang it in the space. This is much like a black cat in a coal cellar. The ball is black but the surroundings are not!

We can’t differentiate a black thing in a black room or space. But if there is light, we can see them. I told you that everything that comes near hole gets one with the singularity. So can this applied to the stars. Massive black holes rip apart the stars near them releasing observable effects. This also releases what is known as gravitational waves- the recent study of which it was a huge scientific discovery.

Blackhole ripping apart stars

This destruction releases radiations. The dust particles that are released when a star gets sucked in a black hole, orbits the hole and is the source of gamma rays. Some, such as the Cygnus X-1 is also a source of X-rays, which are detectable. This makes black holes detectable. Check the illustration on the left for a more visual effect!

Final thoughts

This is my favorite topic and I cannot stop when I start this question about it. Since this post has got very long(on Patreon, it’s Even big as it is thoroughly analyzed with examples), I would like to finish it here and leave the rest topic for later discussions.

Special note

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