Stellar astronomy is the study of stars, including their formation, evolution, and properties. Astronomers observe and analyze the light emitted by stars to learn about their composition, temperature, size, and distance from Earth. They also study how stars evolve over time, from their initial formation in gas clouds to their eventual death as supernovae or white dwarfs. Stellar astronomy plays a crucial role in understanding the fundamental processes that govern the universe, as stars are the building blocks of galaxies and play a key role in shaping the structure and evolution of the cosmos.