On the coloured light of the binary stars and some other stars of the heavens

"On the Coloured Light of Binary Stars and Some Other Stars of the Heavens" is a scientific paper written by the astronomer William Huggins, published in the late 19th century, specifically in 1866. In this work, Huggins discusses the phenomenon of colored light emitted by binary stars and other celestial objects. Huggins was among the pioneers of astrophysics and made significant contributions to the field of spectroscopy—the study of how light interacts with matter.