Stellar Astrophysics is the branch of astronomy that focuses on the study of stars, their formation, evolution, and eventual death. It examines the physical and chemical processes that occur within stars, including nuclear fusion, which powers them and produces light and heat. By analyzing the light emitted by stars, scientists can determine their composition, temperature, and age. Researchers in Stellar Astrophysics also explore the life cycles of stars, from their birth in nebulae to their transformation into white dwarfs, neutron stars, or black holes. This field helps us understand the universe's structure and the role stars play in the formation of galaxies and planetary systems.