black holes are regions in space where gravity is so incredibly strong that nothing not even light can escape to understand why black holes exist though we need to explore the life cycle of stars you see stars are born from vast clouds of gas and dust over millions of years gravity causes these clouds to collapse and form a dense core known as a protostar basically a young Star as a Proto star continues to gather Mass the core temperature will rise until it becomes hot enough to ignite nuclear fusion this process releases an incredible amount of energy which allows stars to shine brightly however when a massive star then exhausts that nuclear energy and has no more fuel a big event known as a supernova can occur during a supernova explosion the Stars outer layers are blasted into space leaving behind a dense core for stars massive enough that core can become a black hole