Today most people think, “What is inside a black hole?” I did my research, and I found that it is one of the most asked questions today. This question is very mysterious in modern astrophysics. Imagine a place where gravity is so strong that it devours all the things, where even a single ray of light can’t escape, and where time also slows down and space bends itself. There is no returning point. This place is what we called a black hole.

Today, no one can give a complete and satisfied answer related to this query. We know about black holes, that they exist, and how they came into existence, and we also have their real images. But we don’t actually know what is inside a black hole. No telescope can capture the inside of a black hole, and even a signal can’t return. If anything crosses the event horizon, it gets lost from the universe. Many scientists have their own theories. We will discuss them in this article in detail.

Mysterious black hole flash

Structure of a Black Hole

To know what is inside a black hole, first we need to understand its complete structure. A black hole is not just an empty hole; it contains several parts.

Singularity

The center of the black hole is called the singularity, and it is the most important part of the black hole. It is a small point at the center where all the mass of the black hole is compressed together. Here the gravity is very powerful; it can crush anything into extremely tiny particles. Physics laws, which we study today, are not working here properly. Even scientists do not know more about singularity.

Event Horizon

The starting boundary of the black hole is called the event horizon. The event horizon is not like a solid surface; it is an invisible outer line of a black hole. It is also called the “point of no return.” It is because if any matter, star, or light entered the event horizon, it couldn’t escape from the powerful gravity of the black hole. Black holes are not visible directly; they don’t emit light. We can detect them by seeing their effects on nearby objects.

Accretion Disk

Many black holes have a glowing structure around them; it is called an accretion disk. This disk is made of gas, dust, and matter that is pulled by gravity. When the matter gets close, it starts spinning and colliding with each other. As a result heat is produced. Because of this heat the disk seems glowing, and sometimes it is bright enough to be seen from very far.

Photon sphere

The region just outside of the event horizon is called the photon sphere. In this region gravity is very powerful; even a light can’t travel in a straight line. Due to strong gravity, light travels in a circular ring around the black hole. It creates amazing visuals around the black hole.

Jets

Jets are made of energy particles, and their speed is very close to the speed of light. These jets are emitted by some black hole from their top and bottom parts. These jets are one of the most energetic phenomena in the universe, and they can travel thousands of kilometers in space.

The journey into a black hole

I hope you get a brief structure of a black hole.

Now let us imagine a scenario where you move towards a black hole. What you actually feel or what happens to your body.

Extreme Gravity Pull

When you move towards a black hole, the first major effect you feel is its very strong gravity. The gravity of a black hole is very powerful. A black hole’s gravitational pull is capable of stretching space and bending light and time, unlike the earth’s gravity that only pulls objects. Near the black hole even light does not move in a straight line. Due to gravity, light bends, and it moves in a ring-like structure. One major effect is time dilation; when you get close to a black hole, you feel normal, but for a distant person, you would appear very slow, or sometimes you would seem like a frozen man to him.

Spaghettification (The Real Phenomenon)

Spaghettification is one of the most famous and real effects when someone falls into a black hole. This means gravity feels different in two parts of your body. For example, if you are falling, the gravity feels stronger in your head and it feels weaker in your leg. As a result your body stretches and compresses from the side. Your body turns into a thin shape like spaghetti. In a smaller black hole, you can feel this effect before crossing the event horizon, but in a massive black hole, you realize this effect after passing through the event horizon. 

Crossing the Event Horizon

The event horizon is like an outer or starting boundary of the black hole. It is also called the “point of no return.” If anyone crosses this invisible boundary, there is no escape route for him. That’s why we call it the point of no return; even a single ray of light can’t escape from here. A person who observes continuously couldn’t see you cross the line. You would seem to fade slowly to him and freeze due to time dilation, but you feel yourself continue falling towards the black hole. After crossing this point, it is impossible to come back or escape from the black hole.

Real Example: The First Image of a Black Hole

Scientists captured the first-ever image of a black hole in 2019. This image was captured by the Event Horizon Telescope collaboration. This collaboration was an international team of scientists from all over the world. They use a global network of radio telescopes to create an earth-sized virtual telescope to capture the image of a black hole. Scientists took the image of a black hole that is situated in the Messier 87 galaxy. This galaxy is also known as M87. It is about 55 million light years away from the earth. In that image, we saw darkness in the center and a bright glowing ring of light around the dark part. From the image we learn about the accretion disk and the existence of event horizons. It is very difficult to capture this image. It is a major scientific achievement that helps humans to see one of the most mysterious objects in the cosmos.

What Happens Inside A Black Hole?

A black hole is one of the biggest mysteries for modern science. No one knows exactly what is inside a black hole. But according to physics, many scientists give many theories on black holes.

Space and time behave very strangely inside the black hole. Normally, you can move in all the directions, but inside the black hole, if you try to move in any direction, you would fall towards the center. It means moving in any direction takes you to the center of the black hole (singularity). Everything is pulled towards singularity in the black hole.

Gravity is very powerful in the center; as you fall deeper, more gravity acts on your body. Singularity is the place where all the physics laws that we studied do not apply. Our scientists do not have any idea or any explanation about why our physics failed inside the black hole. Every scientist has their own assumptions, like some believe gravity crushes the matter into an extremely tiny point at the center, some believe matter changes into an unknown state of matter, and some believe singularity connects with other regions of spacetime. Another big effect is time dilation. If anything is falling towards the black hole. It appears in slow motion to a distant observer. Sometimes it appears frozen, but objects fall constantly in the black hole.

Could A Black Hole Be A Portal?

There are many theories regarding black holes. Could a black hole be a portal? That is also one of them. This idea is like science fiction. Scientists keep searching whether black holes connect to other universes or not. But there is no real evidence regarding this theory. But scientists propose a theory of wormholes, which says black holes might act as a portal. A warm hole is like a tunnel in space that connects two distant points in the universe. This idea comes from the general relativity theory proposed by Albert Einstein. In this theory, a warm hole’s one end looks like a black hole, and the other end is called a white hole. So a black hole might be a part of a wormhole. But this is only a theoretical concept; it is not proven yet.

Conclusion

What is inside a black hole? There is not any satisfactory answer yet for this question. But we have strong scientific clues. Gravity is so extremely strong that it crushes everything inside a black hole. The center of the black hole is called a singularity that contains all the mass, and our physics laws are not working here. Time and space don’t behave normally. Our scientists are trying to know what is inside a black hole. Black holes are one of the most mysterious objects in the universe, and still we have much to learn about our cosmos.