by The Idea of Black Hole is extremely intriguing and amusing, ever since the movie Interstellar, the fascination towards the Black Holes has improved vastly. The Black Holes are the Volumes in space where the gravity is so extreme that even the light can't escape it. So can we fall into a Black hole and make out alive or is it going to make Time Travel possible? Are the Black holes portal to another universe, opening up our understanding of the Multiverse?
What is a Black Hole?
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| Simulation of a Super Massive Black Holes |
A Black hole is an area in space in which even the light can't outrun the force of gravity. The Bending in space-time occurs because of the Black Hole's Gravity. The particles of the Dying star are compressed into a small point called singularity and it is hidden by the object's surface called the Event Horizon also know as the point of no return. Inside the Event Horizon, the escape velocity (the velocity needed to evade the gravitational field of the space body) is greater than the speed of light, so even the light rays can't evade the gravity of the Black hole. Thus the direct observation of the Black hole is not possible.
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| The Bending of Space-time by the Black Hole |
Recently in 2019 scientists and astrophysicists made the attempt and photographed the image of the Black hole by creating a network of telescopes called the Event Horizon Telescope. The Black holes are sprinkled throughout the Universe and they are typically 10 to 24 times the mass of the sun. Astronomers have predicted that they could be billions of Black holes in the Milkyway galaxy only, imagine the number of Black holes that might be present in our universe! There are four types of Black holes in the observable universe:
- Stellar Black Holes,
- Intermediate Black Holes,
- Supermassive Black Holes and
- Miniature Black holes.
The largest stars collapses and compresses to become the Stellar-mass Black Holes, they keep growing in size by consuming the particles in their surrounding galaxies. The Supermassive Black holes are something we definitely need to look into, these are a billion times the mass of the sun and they are present in the center of every galaxy. These massive Black holes could be formed due to the merging of thousands of miniature Black holes.
Our Milkyway galaxy has the Supermassive Black Hole Sagittarius A at its center and it is 4,130,000 times massive as the Sun. The Intermediate Black holes were first thought to be non-existing, the recent advancements in our technology found that they could be formed due to the collision of Cluster colliding in a chain reaction. The Miniature or Micro Black holes which are considered to be smaller than the Stellar Black holes are proved to exist by Stephen Hawking in 1971. They might be observed through the particles they emit due to the Hawking Radiation.
How do the Black Holes form?
The Astronomers predicted that the Black holes could have formed when the Universe commenced off. The formation of Stellar Black holes occurs due to the collapse of a massive star. When the Star has depleted all of its energy, the core of the star becomes unsteady, forming a gravitational collapse. Thus forming a supernova and blasting all the particles of the star in the vast cosmos.
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| The Bending of Space-time by the Black Hole |
How the Black Holes can affect Time?
The black holes are definitely stranger than you think. They are considered to be the one-way path outside the universe, mind it! There is no coming back, even you can't communicate with the people outside the Black Hole. Inside the Black hole or the Event horizon is where our understanding of time breaks out, as the time comes to an abrupt stop inside the black hole.
By Einstein's Theory of General Relativity, the more gravity exerted on an object, the slower the time runs. As the object nears the Event horizon, the object appears to be moving in slow motion for the people on the outside of the Black Hole. Meanwhile, the universe will appear to be moving faster for the object. Some theories have even predicted that the images of the past and future will be visible from the inside, although there is no way to test it. Black Holes are cool, right? Exploring the Black holes might be the way to find out about the existence of the Multiverse.
Will the Black Holes destroy the Universe?
The End of our Universe?
Firstly clearing the misconception about the Black hole, they don't suck. I mean literally, the gravitational pull exerted by the Black hole is the same as that of a regular star. If we were to replace the sun with the same sized Black hole, the planets will still revolve around the same orbit without any wobble. So even though there are billions of Black holes known to be in our galaxy, the gravitational pull won't be enough to suck down and destroy our entire galaxy. They are not going to destroy the Universe in fact, they are the reason for the existence of the galaxies and making sure that the stars are staying in the orbit. The Black Holes shaped our universe into the way it is today.
Conclusion
So yes! Going inside a Black hole was never a good idea. Not even the light could escape the event horizon, nothing in the universe can outrun the speed of light. So even if Interstellar travel becomes accessible one day, you might not want to explore the Black hole. There is simply too much we don't know, if we survive long enough to make advanced in Space travel, then sending a probe to the Black hole might be a better option. But Black Holes are cool and scary at the same time!
