Stellar spectra

Stellar spectra refer to the light emitted by stars, which can be analyzed using a spectroscope. When light from a star passes through a prism or diffraction grating, it splits into a rainbow of colors, revealing dark lines known as absorption lines. These lines correspond to specific wavelengths of light that are absorbed by elements in the star’s atmosphere. By studying these lines, astronomers can learn about a star's temperature, composition, velocity, and distance. This information helps us understand the nature of stars and their role in the universe.