

A comet hunter who got frustrated by fuzzy objects, so he made a 'not-comet' list that became astronomy's greatest hit catalog.
Charles Messier's passion was chasing comets, the glamour objects of 18th-century astronomy. But his telescope kept finding fixed, fuzzy patches that mimicked comets, wasting his time. Annoyed, this meticulous French observer began cataloging these nuisances so he and others could ignore them. The result, his Catalogue des Nébuleuses et des Amas d'Étoiles, was a masterpiece of unintended consequence. From the Crab Nebula (M1) to the Andromeda Galaxy (M31), his list of 110 objects became not a guide of what to avoid, but a treasure map of the sky's most spectacular deep-sky wonders. Though he saw himself as a comet hunter (and found 13), his legacy is the 'M' numbers that still thrill amateur astronomers and serve as a foundational syllabus for cosmic observation.
The biggest hits of 1730
The world at every milestone
The very first object in his catalog, M1 (the Crab Nebula), is the remnant of a supernova observed by Chinese astronomers in 1054.
He survived a fall into an ice cellar in his youth, an accident that left him bedridden for a year and may have fueled his patient, observational character.
He made all his observations with relatively small, refracting telescopes, nothing like the giant instruments that followed.
Messier observed the 1769 transit of Venus from a specially built observatory at the Hotel de Cluny in Paris.
His final discovered comet, Comet 1798, is known as 'Messier's Comet.'
“What caused me to undertake the catalog was the nebula I discovered above the southern horn of Taurus on September 12, 1758.”