Black holes are mysterious gravitational entities that have captivated scientists and the public alike since their discovery. They are often referred to as cosmic vacuum cleaners because of their ability to suck in all matter and light around them. Some other synonyms used for black holes include singularity, abyss, vortex, dark star, death star, and collapse star. These names reflect the eerie and ominous nature of these celestial bodies. While black holes cannot be directly observed, their effects on surrounding matter offer clues as to their existence and behavior. Black holes remain an area of active research and remain one of the most interesting phenomena in our universe.