Black holes are formed when massive stars run out of fuel and collapse under their own gravity. During this process, the star's core becomes incredibly dense, creating a singularity with infinite density and zero volume. This intense gravitational pull leads to a region called the event horizon, beyond which nothing, not even light, can escape. The formation of a black hole can result in two main types: stellar black holes and supermassive black holes. Stellar black holes typically have masses up to 20 times that of our sun, while supermassive black holes can have masses millions or even billions of times greater. Once formed, black holes continue to grow by absorbing matter and merging with other black holes. Despite their intimidating reputation, black holes play a crucial role in the universe by influencing the evolution of galaxies and regulating the distribution of matter. Understanding the formation and behavior of black holes is essential for astronomers in unraveling the mysteries of the cosmos. The study of black holes not only sheds light on the boundaries of physics but also provides valuable insights into the nature of space and time.