Messier can refer to Charles Messier and
Messier Objects.
In the year 1771, Messier, a discoverer of comets, published a catalog of 68 "nebulae" in the "Memoirs of the French Academy of Science."
In the years 1781, 1782 this list was republished in the Connaissance des Temps, and 35 other nebulae were added, thus bringing the total up to 103 nebulae. Most of these nebulae have been carefully re-observed since Messier's time, and some of them have proved to be most wonderful and interesting objects.