by Jim King

I find myself compelled to once again, give credit where credit is due. While Charles Messier basks in the glow of his famous catalogue of non-comets, he had help! During his collaboration with Messier, Pierre Mechain added 25 or 26 objects to Messier’s catalogue (depending on how one looks at M102).
These include Messier’s 63,72,74,75,76,77,78,79,85,94,95,96,97,98,99,100,101, 102(?), 103, 104, 105,106,107,108,109… a sizable addition to Messier’s work.
Pierre Méchain was born in Laon, the son of the ceiling designer and plasterer Pierre François Mechain and Marie–Marguerite Roze. He displayed mental gifts in mathematics and physics but had to give up his studies for lack of money. However, his talents in astronomy were known to Jerome Lelande, for whom he became a friend and proof-reader of the second edition of his book "L'Astronomie". Lalande then secured a position for him as assistant hydrographer with the Naval Depot of Maps and Charts in Versailles, where he worked through the 1770s engaged in Hydrographic work and coastline surveying. It was during this time—approximately 1774—that he met Charles Messier, and apparently, they became friends. In the same year, he also produced his first astronomical work, a paper on an occultation of Aldebaran by the Moon and presented it as a memoir to the Academy of Sciences.
In 1777, he married Barbe-Thérèse Marjou whom he knew from his work in Versailles. They had two sons: Jérôme, born 1780, and Augustin, born 1784, and one daughter. He was admitted to the French Académie des Sciences in 1782, and was the editor of Connaissance des Temps from 1785 to 1792; this was the journal which, among other things, first published the Messier Objects. In 1789 he was elected a Fellow of the Royal Society.