Paper Title
BLACK HOLES - THE MYSTERY OF THE UNIVERSE

Abstract
Abstract - The following research article is about the basic characteristics of the black hole- its historical background, its formation, different types, and existing black holes, to provide a complete picture. This work also describes the basic concepts of black hole theory, along with the locations where black holes are suspected, namely binary X-ray sources and galactic nuclei. Big stars are like pressure cookers where the explosive force of nuclear fusion inside them can create outward pressure which, in turn, is constrained by gravity pulling everything inwards. We now know that black holes are big stars usually present in the nuclei of normal galaxies with masses millions to billions that of the sun. Scientists think supermassive black holes were made at the same time when their galaxies were born. In 1916, Karl Schwarzschild found the first modern solution of general relativity that can characterize a black hole. One example of a black hole can be found in Cygnus X-1, a binary X-ray system consisting of a blue supergiant and an invisible companion which is 14.8 times the mass of the Sun. Keywords - Blackhole, Spaghettification, Singularity, Event Horizon, Schwarzschild Radius, Ergosphere