Were Messier's catalogues widely used during his lifetime?
No
Yes
Answer
The Messier Catalogue was not widely used during Messier's lifetime, as it was not published until after his death. The catalogue was not widely used until the mid-19th century, when it was rediscovered by astronomers and became a valuable resource for studying the night sky.
Messier's Celestial Odyssey: The Enchanting World of Charles Messier