The universe contains many diverse and exotic bodies that we are only beginning to understand. Among the countless exotic bodies, the most elusive one is probably the black hole. In astronomy there have been numerous theories and questions about black holes. The object of these investigations was the properties, processes, effects and function of black holes. Even now, scientists still don't fully understand black holes because they are very difficult to detect. By definition, a black hole is a region of space where the collapse of matter gives rise to a gravitational field so intense that not even light can escape. This is due to the fact that black holes are capable of bending space-time to extremes. Due to this rather unique effect on spacetime, a point occurs where the curvature of spacetime becomes infinite. Furthermore, this point can be calculated mathematically for black holes. In fact, this point was calculated in 1915 by Karl Schwarzschild and is called a singularity. However, the existence of black holes had been predicted well before this time. The first idea of ​​a black hole was proposed by a geologist named John Michell in 1783. It was later revived by the mathematician Laplace in 1796. It was around this time that Laplace coined the term “dark stars” in reference to the idea of ​​black holes. However, the idea of ​​black holes was largely rejected at the time because the effect of gravity on light was not understood. Then, in 1915, Albert Einstein introduced his theory of general relativity which managed to demonstrate that gravity has an effect on the propagation of electromagnetic radiation. It was at this point that Karl Schwarzschild managed to find a solution to Einstein's problem... halfway through paper... 974, when he managed to use quantum field theory to demonstrate that black holes emit a certain amount of energy. radiation similar to that of a black body. In other words, he managed to prove that black holes are not really black. Furthermore, this decade also marked the identification of the first good black hole candidate. Astronomers have determined that the X-ray binary star Cygnus X-1 is a black hole by observing its effects on its companion star. By observing this effect, astronomers were able to determine that Cygnus X-1 is compact and has a mass much larger than the maximum stable mass of a neutron star. In 1994, the Hubble Space Telescope provided the best evidence of the presence of supermassives at the centers of galaxies. More recently, researchers at Johns Hopkins University provided the first visual evidence of the existence of black holes by publishing images of a red giant being engulfed by a supermassive black hole..