Today, 252 years ago, on October 12, 1773 (August 27, 1773), the French astronomer Messiah first discovered galaxies with a spiral structure. Messiah on October 13, 1773, the French astronomer Messiah first discovered galaxies with a spiral structure, M51. Messiah (Messier.Charles, 1730.6.26-1817.4.12) was the first French astronomer to compile a system of nebular clusters, the Messiah clusters. In Messiah's era, the Nebula was a term used to describe any vague source of light in the deep sky. In 1751, Messiah (Messier.Charles, 1730.6.26-1817.4.12) was a French astronomer who worked as an astronomer and recorder. He was the first French observer to predict the Harley cluster returning in 1758-1759. Since then