Stellar evolution is the process by which a star changes over time, driven by nuclear fusion in its core. Stars are born from clouds of gas and dust, and their life cycle includes stages such as the main sequence, red giant, and supernova, depending on their mass. For example, a massive star may end its life in a spectacular explosion, while a smaller star like our Sun will eventually become a white dwarf. Throughout their evolution, stars play a crucial role in the universe by creating and distributing elements through processes like nucleosynthesis. This not only enriches the interstellar medium but also contributes to the formation of new stars and planets, making stellar evolution a fundamental aspect of cosmic development.