How many comets did Charles Messier discover?

The Comet Ferret: Getting the Real Scoop on Charles Messier’s Comet Count

Okay, so Charles Messier. You know, the guy famous for that list of galaxies, nebulae, and star clusters? Turns out, that wasn’t even his main gig! The dude was obsessed with comets. So much so that King Louis XV himself nicknamed him the “Ferret of Comets!” Seriously! But here’s the burning question: just how many comets did this “Ferret” actually discover? Well, buckle up, because the answer isn’t quite as straightforward as you might think.

Most sources will tell you Messier independently discovered 13 comets. And that’s true, as far as it goes. Basically, these were comets he spotted first, staking his claim as the OG discoverer. This was back in the day – we’re talking 1760 to 1798 – when hunting for comets was like the astronomical equivalent of a gold rush.

For the record, here’s the list of those lucky 13 comets Messier bagged:

• C/1760 B1 (Messier)
• C/1763 S1 (Messier)
• C/1764 A1 (Messier)
• C/1766 E1 (Messier)
• C/1769 P1 (Messier)
• D/1770 L1 (Lexell)
• C/1771 G1 (Messier)
• C/1773 T1 (Messier)
• C/1780 U2 (Messier)
• C/1785 A1 (Messier–Méchain)
• C/1788 W1 (Messier)
• C/1793 S2 (Messier)
• C/1798 G1 (Messier)

But hold on, there’s more to the story! It wasn’t just about being the first to see them. Messier was involved with comets in other ways, too. He co-discovered comet C/1801 N1 (Pons), for example. And get this: he meticulously observed and wrote about tons of other comets, even the ones he didn’t discover himself! We’re talking about potentially 46 comets that he tracked between 1758 and 1808! That’s some serious dedication.

Now, you might be wondering, why was he so obsessed with comets in the first place? Well, that obsession actually led to his famous catalog. See, when he was out there hunting for comets, he kept running into these faint, fuzzy blobs that looked like comets at first glance. To avoid getting fooled, he started making a list of them. “Nope, not a comet, just another one of those things.” And that list? That became the Messier Catalog, which is still a lifesaver for astronomers today. Talk about a happy accident!

So, what’s the takeaway? Charles Messier’s legacy is way more than just a catalog of deep-sky objects. He was a true pioneer, a passionate observer, and a dedicated “Comet Ferret.” Whether you count 13, or more, one thing’s for sure: he left his mark on astronomy, and we’re still benefiting from his work today. Not bad for a guy just trying to find a few comets, eh?