Stellar spectra is a branch of astrophysics that focuses on the study of the electromagnetic radiation emitted by stars. By analyzing the light emitted by stars across different wavelengths, researchers can gain insights into the temperature, composition, and other physical properties of stars. Stellar spectra can reveal information about a star's age, mass, luminosity, and evolutionary stage. This field is crucial for understanding the life cycle of stars and the fundamental processes that govern their behavior.