Black holes are fascinating objects in the universe that form when massive stars reach the end of their life cycle. Once a star exhausts its nuclear fuel, it can no longer support itself against gravity and collapses in on itself. This collapse compresses the star's mass into a tiny volume, creating a gravitational pull so strong that not even light can escape - hence the name black hole. The region surrounding a black hole, known as the event horizon, is a point of no return where the gravitational pull is so intense that nothing can escape, not even light. Anything that crosses the event horizon is trapped forever in the black hole's center, known as the singularity. There are two main types of black holes: stellar black holes, formed from the remnants of massive stars, and supermassive black holes, which exist at the centers of most galaxies and can be millions or even billions of times more massive than our Sun. The study of black holes provides valuable insights into the nature of space, time, and gravity, and continues to be a vibrant field of research in astronomy.