Black holes -- A very intriguing point of Astronomy

A black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it. Usually they form when super or ultra-massive stars collapse at the end of their life cycle. A star collapses due to it's very heavy weight--A big burden for it's energy--so it becomes a black hole and literally consumes Other objects for energy. When a star collapses, It will look much more smaller than it's original self, But it weighs the same. According to theory, within a black hole there's something called a singularity. A singularity is what all the matter in a black hole gets crushed into a single point--an infinitely small point. TON 618 is a very distant and extremely luminous quasar, located near the North Galactic Pole in the constellation Canes Venatici. It contains the most massive known black hole , with a mass of 66 billion M☉. An 'M☉' is the symbol for solar masses--that equates to about two quintillion kilograms, or, the weight of the entire sun--so you can imagine what 66 billion times the mass of the sun compressed into a smaller point will weigh.