 Henri-Alexandre Deslandres

Henri-Alexandre Deslandres was a French astronomer known for his work in solar physics and spectroscopy. He was born on 21 September 1853 and passed away on 18 March 1948. Deslandres is particularly noted for his contributions to the study of the solar spectrum and the development of spectroscopic techniques. He played a key role in improving our understanding of solar phenomena and was one of the early scientists to explore the composition of the Sun and its various layers.