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Black holes are one of the most sophisticated topics in physics, but they’re still mysterious and enigmatic. In this blog post, I explain what black holes are and how understanding them can help us figure out how the universe works. What are Black Holes? Black holes are formed when a star collapses into itself. Black holes are the densest objects in existance!. They can be millions of times more massive than the sun. A
black hole is so dense that not even light cannot escape its gravity and hence it is also called as the darkest area in space. Black holes do not give off light; they absorb all the light passing by them.It is believed that there are two types of black holes – stellar mass black holes, which weigh at least 4 million times their own mass, and supermassive black holes found in the centers of galaxies or quasars or neutron stars created during universe formation processes. The existence of Black Holes indicates that something must have existed before the Big Bang occurred because even now we cannot see back further than when the Big Bang took place
Astronomers say that black holes are invisible. We only know about them because they have a strong gravitational pull on nearby stars and other things in space. When we look at a black hole, we see an event horizon–a boundary from which nothing can escape, not even light. Black holes see a whole new side of the Universe when they become active. These dark secretomies are the places where things can be destroyed and re-formed – like the Big Bang. But how exactly is a black hole formed?
A black hole starts as a small, dense star that goes supernova at some point in its lifespan, ejecting most of its mass in the form of hot gas. When this happens, it becomes a very small object known as an accretion disc. As matter gets closer to its center, it starts to emit X-rays, flaring its light on the way down. It’s commonly believed that this is just how black holes are born: bloated stars whose gravity is strong enough to rip other stellar objects apart with powerful flares. But there’s an important part of a black hole’s life cycle that we don’t see: the accretion disk around it. Accretion disk is a circular object with a bright, ring-shaped structure of matter that surrounds the black hole. This material is squeezed by tidal forces into tight rings as it orbits closer to the immense gravity at the black hole’s center. A dense disk of accreation around a black hole shows that some matter is collapsing. Black holes are cyclic. They come into being, they eat material and then they die. But there’s a cycling process that many people have overlooked. There are many places on the internet where you can learn more about black holes. The most popular of these is Wikipedia. For information on black holes, read more at National Geographic: https://www.nationalgeographic.com/science/article/black-holes?