Black Hole: a cosmic monster or a wonderful gift of science!

Black Hole: a cosmic monster or a wonderful gift of science!

        Black Hole

 

       ‘Black Hole’ is a very interesting subject for physicists. But even as ordinary people, we are more or less familiar with the word.
The first picture of the black hole was published in April 2019. Black holes are still very obscure with many things. Today we will give you some detailed information about black holes.

 

But the first question is why do we know about BLACK HOLE?

The question is appropriate. We know that the speed of light is the highest in this world. But surprisingly, light cannot enter and exit through this black hole. Of course a source of curiosity.

You would be surprised to think that the mass of a black hole is more than that of the Sun, or it maybe 1000 times or more. The funny thing is, it’s not possible to see a black hole with the naked eye. This is not the end, despite being so big, or they are constantly growing!

Yes ‘they’ because the numbers are innumerable.

Well! If something enters a black hole, it can no longer exit the black hole, so what if the earth enters a black hole. What will happen to us?

Such questions will only increase our curiosity about black holes. It is because of these curiosities as ordinary people that we will learn about black holes.

Let’s see…

 

What is a black hole?

A black hole is a place in the cosmic world where the gravitational force is the strongest. So strong that the light cannot pass. Very densely packed lightweight objects distort space-time, creating black holes. Since light cannot pass through a black hole, the black hole disappears. It is observed by telescopes made with the latest technology.

But, How big can a black hole be?

 

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There is no doubt that everything in the universe, or at least the worldly mysteries we know about, is enormous in size. In the same way, black holes are bigger and bigger than stars. But according to the theory, black holes can be not only big but also small. According to scientists, the size of a small black hole maybe like a molecule but the mass is like mountains. Some black holes may be larger in size than stars, whose mass may be several thousand times the mass of stars.

 

Classification of Black Holes –

Black holes can be divided into four parts according to mass.

 

1. Super Massive Black Hole –

The largest black hole. The mass can be about 10 ^ 5 to 10 ^ 10 times the mass of the Sun. The radius can range from 0.001 to 400 AU.
AU is the unit of length. Whose value is equal to the distance of the sun from the earth.

Examples – Milky Way Galaxy, NGC 3031 (M81), NGC 891.

2. Intermediate Mass Black Hole-

Its mass is about 10^3 times the mass of the Sun. The radius can be equal to the radius of the earth from 10^3 km.

E.g. – HLX – 1

3. Stellar Black Hole –

The mass of the Stellar black hole is about 10 times the mass of the Sun. Radius 30 km or less.

Examples – LB-1, Cyg X-1, XTE J1118 + 480 etc.

4. Micro Black Hole –

The mass of this black hole may be equal to the mass of the maximum moon. Radius 0.001 mm. The smallest black hole class.

How are black holes formed?




 

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In the beginning, the galaxy started with the Big Bang. This collision created tiny black holes. The concentration of stars was much higher after the Big Bang. Due to the high density, the pressure inside the star often cannot hold the elements in the star. This is why gravitational collapse occurs. Which causes black holes. The collision of two stars and the formation of a black hole. These black holes gradually turn into supermassive black holes, absorbing gases, cosmic dust, and cosmic objects formed after the destruction of the constellations. Black holes are created due to the various cosmic conflicts that take place in the world in general and it continues to grow over time.

 

How do scientists find black holes?

Black holes are certainly dark but how did scientists find them in dark space. Scientists do not usually study black holes by collecting images. The light is also lost due to the extra strong gravitational ball inside the black hole. So the black hole disappears. So scientists keep an eye on the stars. They consider the religions of the stars and the gas of the stars. When a star comes in contact with a black hole, very bright light is created. Scientists use telescopes and special equipment to see blackhole. It is impossible to observe with the human eye.

So, will black holes cause the destruction of the earth?

In fact, a black hole is not a cosmic monster that will travel from place to place eating (not exactly like eating food)   planets and stars. So there is no such possibility. Moreover, black holes are slowly getting bigger, but they are much smaller in size. So there is no possibility of such a black hole ever reaching near the earth. And if the sun is destroyed and a black hole is created, then! In fact, there is no reason to be afraid because if the sun turns into a black hole, it will not be very strong. So the Earth and other planets are more likely to revolve around that black hole.

History and Receipts –

The first and earliest mention of a black hole is found in the Vedas of ancient India. The idea has been slowly coming to the West since the 180s. Albert Einstein then outlined the concept in his General Theory of Relativity (GTR) in 1918. In 1967, the American astronomer John Wheeler first mentioned the word ‘black hole’.Stephen Hawkings then went on to give some interesting information from his research about black holes. He went with the idea of ​high energy light radiation. For which we came in 2019 and saw the picture of the first black hole. There are also two important gains, redshift and time dilation. Normally, black holes cannot penetrate any high-speed electromagnetic rays like the light.

We can understand black holes by studying the stars. It takes a few light-years for the light emitted when the bullets in the star disappear into a black hole to reach our Earth, which is said to be weak.

This light looks much redder than usual in our eyes. This is known as the “redshift” according to Einstein’s theory of relativity. Also, the idea that light cannot pass through the contact of a black hole is another idea that it takes infinite time to pass through the light, probably because the time in contact with a black hole is much slower. From the earth, it will seem that time is moving slowly there and from there it will seem that time is moving fast on the earth. Which is known as ‘time dialysis’.

Future –

Of course, black holes are a complex concept. However, it can give a lot more in the future.

First of all, we see the light stuck. In that case, time is moving very slowly, just as it is true that time can be fixed in a black hole. It can give us the gift of two groundbreaking discoveries in the future.

1. Time machine
2. Go faster than light.

Second, there may be the idea that nothing is missing in a black hole. Maybe everything that has disappeared is going to another universe. Which gives us the concept of a Universal Gate. From where we can get the idea of ​​‘Multiverse’, ‘Parallel Universe’.

All of these are at the research level. Time will tell how many mysteries can be solved by accurate and sophisticated technology. Hopefully, I have been able to give some ideas about black holes. Stay well. Thanks.

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