الخميس, سبتمبر 24

All you need to know about Black holes

The black hole is the only discovery made that has changed everyone’s perspective about outer space and the Universe. 

What is Black Hole?

When we here the term black hole, we usually assume a massive hole that engulfs anything that comes in its way, but scientists explain it from a more different and diverse point of view. In technical terms, the black hole is a region of spacetime exhibiting strong gravitational force that nothing can get out of it, not even a ray of light. The general relativity theory foretells that adequately compact mass can deform spacetime to create a black hole.

In simpler terms, a black hole is a place in space where gravity pulls so much that even light cannot get out. The gravity is strong because the matter has squeezed into a tiny space.

Size

Regarding the size of black holes, they can be as small as one atom or can be massive as 1 million suns put together. After studying some more about these mysterious black holes, scientists, and researchers have found proof that every large galaxy has an enormous black hole at its center. So our Universe is home to many different sizes of a black hole that can be found almost anywhere in space.

History of Black Holes

Black holes have been a part of our Universe for a long time, but the first theoretical explanation of black holes was given in 1916 by a scientist named Karl Schwarzschild. He was the first scientist to have explained a modern solution of general relativity that would characterize a black hole. Different scientists tried to learn more about black holes, and the first-ever physical black hole was spotted in 1971. Then in 2019, the Event Horizon Telescope collaboration revealed the first image of a black hole.

Scientific theories

For the past couple of years, different scientists have tried to study the Universe, and its working, and everyone has come forward with their theory. Galileo, Stephen Hawking, Einstein are a few of the many scientists that have studied outer space and have tried to find answers of our origin in the infinity we inhabit.

Phases of Black hole

A black hole also passes through some phases i.e., birth, growth and death.

Birth Phase

A black hole is formed when the massive stars had completed their life cycle, so they collapse, and this process causes supernova. A “supernova” is a star that explodes and blasts its small parts into space. Inside the black holes, gravity is so much that even light cannot get out of it. So that is why it also called Black Hole.

There is a close link between the birth of the black hole and the explosion of a star. It is common happening all across the Universe. Black Holes and Stars are entwined, mostly in the part of the universe where star formation is at stirring at very high speed. Dead stars are easy to find. Its life span depends on its mass. They have short life-span as they die very quickly because they burn through their fuel real fast.

A super large black hole, in the beginning, is smaller, and then it becomes a lump of million or a billion times than the mass or lump of the sun. You will think about how they become such massive masses.

Growth Phase

Black holes gradually increase in size. As things fall them into and because of high gravity, they are unable to come out, so all the things collectively form the mass of the black hole, letting it grow. It does not matter whether it is the gas, the exploding stars, ripped out the planet that falls into it. Whatever falls into it, becomes a mass of the black hole.

Black Holes are supermassive or stellar-mass black holes; there is a considerable size gap between the two. Whereas, all accounts there should be medium-sized black holes; Goldilocks approved black holes that fit in between the massive and stellar-mass black hole. The only issue is that researchers have not observed them yet. So it is not like that medium-sized black hole does not exist, they are, but it is tough to point them out as they are not much brighter.

Death Phase

The question which arises that how long these black holes stay? As they come into existence, then gradually grows, then what happens. Can they die? According to Stephen Hawking, this might be possible with a physics mechanism known as Hawking radiation. It is not possible to directly focus on the slow leak of Hawking radiation from the black hole. It is mainly because of the enormous scale and time difference between black holes and subatomic particles.

Blackhole not like movies

As we are concerned about black holes, it has sparked a lot of interest among everyone around the world. Different people have come forward with their idea regarding this entity. To some, it is a portal to some other universe or is concerned with time travel. It has also been the main topic of so many different movies, but sorry to burst your bubble, but the black hole is not as it is shown in these fictional movies. It is not a portal to some other world but is merely a hole that is made when a star collapses.

Various discoveries have been made that more thoroughly explains the origin of black holes and how it is going to affect us, humans.

Physical proof

So now that we have physical proof of black holes, what would it mean for us? Well, our demise won’t be like, as many assume. Black holes may be supermassive, but our planet well never falls into one. Not any black hole is close enough, and the sun, will never turn into one. Even if it does, having the same mass as of the sun, all the planets instead of falling into the black hole would orbit around. Scientists still do not know what is inside a black hole, no one can travel into one, and because it has a massive amount of gravity, no one will be able to return.

Our Universe is more than just planets and stars, and more we study it more diverse it becomes. All these discoveries have given us a chance to learn more and be aware of the world in which we live. 

Black Holes dangerous or safe

Black Holes are so puzzling, massive, and still unspecified, but they are not dangerous. Nobody needs to worry about them. They are so far away from human beings; they can not cause any kind of harm to humans.  However, Stephen Hawking, who was a British theoretical cosmologist, died in a black hole as he was shining a light on them. His name will always be tied with the black holes.

Concluding it, black holes are merely compact objects. Only stars that are huge become black holes after their life cycle. Not a single particle can escape through it as they have a high gravitational pull. They are huge and are not dangerous at all. Researches are in the process of their precise nature.

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