 Discoveries by Charles Messier

"Discoveries" by Charles Messier refers to the catalog of astronomical objects that he compiled in the 18th century. Charles Messier was a French astronomer known primarily for creating the Messier Catalog, which lists nebulae and star clusters that he discovered or observed. His work was significant because it helped astronomers differentiate between permanent objects like comets and the fuzzy patches of light, which are now understood to be galaxies, star clusters, and nebulae.