What is a Black Hole in reality?

Black holes are one of the strangest things in existence. They don't seem to make any sense at all. Where do they come from and what happens if you fall into one?

Stars are incredibly massive collections of mostly hydrogen atoms that collapsed from enormous gas cloud under their own gravity. In their core, nuclear fusion crushes hydrogen atoms into helium releasing a tremendous amount of energy This energy, in the form of radiation, pushes against gravity, maintaining a delicate balance between the two forces.

The black hole's gravity is that much high that is literally pulls the space around them. Our solar system also slowly moving towards a black hole. A black hole is able to absorb our whole solar system in a minute. Scientists believe that the black hole is far from the time. How much you become near to the black hole the time is slowly decrease compare to normal space.

As long as there is fusion in the core, a star remains stable enough. But for stars with way more mass then our own sun the heat and pressure at the core allow them to fuse heavier elements until they reach iron. Unlike all the elements that went before, the fusion process that creates iron doesn't generate any energy. Iron builds up at the centre of the star until it reaches a critical amount and the balance between radiation and gravity is suddenly broken. The core collapses. Within a fraction of a second, the star implodes. Moving at about the quarter of the speed of light, feeding even more mass into the core. It's at this very moment that all the heavier elements in the universe are created, as the star dies, in a supernova explosion. This produces either a neutron star or if the star is massive enough, the entire mass of the core collapses into a black hole.

If you looked at a black hole, what you'd really be seeing is the event horizon. Anything that crosses the event horizon needs to be travelling faster than the speed of light to escape. In other words, it's impossible. So we just see a black sphere reflecting nothing. But if the event horizon is the black part, what is the "hole" part of the black hole?

The singularity. We're not sure what it is exactly. A singularity may be indefinitely dense, meaning all its mass is concentrated into a single point in space, with no surface or volume, or something completely different. Right now, we just don't know. it's like a "dividing by zero" error. By the way, black holes do not suck things up like a vacuum cleaner, If we were to swap the sun for an equally massive black hole, nothing much would change for the earth, except that we would freeze to death, of course.

In 1783, the famous professor of Cambridge University Jhon Michell (1724-1793) shared his theory about Black Hole. He is the first man who discovered the Black Hole. After this, in 1796 a French scientist Pierre Simon (1749-1827) wrote all details about Black Hole in his own book 'The System of the Word'.