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Black holes, as observed in the realm of observational astronomy, are regions in space where gravity is so strong that nothing, not even light, can escape from them. They are formed when massive stars undergo gravitational collapse at the end of their life cycles. In the context of astronomy and astrophysics, black holes serve as a prime example of the extreme conditions that exist within our universe, pushing the boundaries of our current understanding of physics. Within the hierarchy of science, astronomical observations provide valuable insights into these enigmatic objects, allowing scientists to study their properties and interactions with nearby matter. By examining the radiation emitted by the material surrounding black holes or observing their effects on nearby stars and galaxies, researchers can infer important information about the characteristics of black holes, such as their mass, spin, and charge. In summary, black holes in observational astronomy represent a fascinating intersection between science, astronomy, and astrophysics, where the study of these objects offers unparalleled opportunities to deepen our understanding of the universe's most extreme environments.