--- title: "Meaning & Key Takeaway of: What caused me to undertake the catalog…" description: "\"“What caused me to undertake the catalog was the nebula I discovered above the southern horn of Taurus on September 12, 1758, while observing the comet..." image: "https://sms4smile.com/quotes/i/192/charles-messier-227037_astronomer_what-caused-me-to-undertake-the-catalog_2571649.jpg" --- # What caused me to undertake the catalog was the nebula I… ![“What caused me to undertake the catalog was the nebula I discovered above the southern horn of Taurus on September 12, 1758, while observing the comet of that year. ... This nebula had such a resemblance to a comet in its form and brightness that I endeavored to find others, so that astronomers…” quote by Charles Messier](https://sms4smile.com/quotes/i/192/charles-messier-227037_astronomer_what-caused-me-to-undertake-the-catalog_2571649.jpg) [Download](https://sms4smile.com/quotes/i/192/charles-messier-227037_astronomer_what-caused-me-to-undertake-the-catalog_2571649.jpg) [Open image](https://sms4smile.com/quotes/i/192/charles-messier-227037_astronomer_what-caused-me-to-undertake-the-catalog_2571649.jpg) > ““What caused me to undertake the catalog was the nebula I discovered above the southern horn of Taurus on September 12, 1758, while observing the comet of that year. ... This nebula had such a resemblance to a comet in its form and brightness that I endeavored to find others, so that astronomers would not confuse these same nebulae with comets just beginning to shine. I observed further with suitable refractors for the discovery of comets, and this is the purpose I had in mind in compiling the catalog. After me, the celebrated Herschel published a catalog of 2000 which he has observed. This unveiling the sky, made with instruments of great aperture, does not help in the perusal of the sky for faint comets. Thus my object is different from his, and I need only nebulae visible in a telescope of two feet \[focal length\].”” [Charles Messier](https://sms4smile.com/quotes/author/charles-messier/) ## About This Quote This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation. Messier cataloged nebulae to differentiate them from comets, focusing on objects visible with modest telescopes. **In simple terms:** He listed nebulae to avoid confusing them with comets. Key Takeaway Use clear criteria to distinguish similar phenomena. Themes astronomy cataloging observation science methodology historical research Mood curious respectful inspired Type Astronomer:1 Astronomy:1 Catalog:1 Comet:1 Discovery:1 Frederick-william-herschel:0 Herschel:0 Nebula:1 Purpose:0 Science:1 Sir-william-herschel:0 Sky:1 Space:1 Taurus:1 Telescope:1 William-herschel:0 Nebulae Comets:0 Nebula Discovered:0 Nebulae Visible:0 Catalog Nebula:0 Herschel Published:0 When to use this quote - amateur astronomy clubs - educational planetarium shows - historical research projects - telescope hobbyist guides - science education curricula Key Concepts nebula classification telescope technology comet tracking data organization scientific communication Questions to Reflect On - How would you update Messier’s catalog today? - What tools aid modern nebula identification? A Different Perspective Modern surveys with larger telescopes may render his criteria outdated for faint objects. ★ ★ ★ ★ ★ No ratings yet [Astronomer](https://sms4smile.com/quotes/about/astronomer/) [Astronomy](https://sms4smile.com/quotes/about/astronomy/) [Catalog](https://sms4smile.com/quotes/about/catalog/) [Catalog Nebula](https://sms4smile.com/quotes/about/catalog-nebula-1697149/) [Comet](https://sms4smile.com/quotes/about/comet/) [Discovery](https://sms4smile.com/quotes/about/discovery/) [Frederick-william-herschel](https://sms4smile.com/quotes/about/frederick-william-herschel-67319/) [Herschel](https://sms4smile.com/quotes/about/herschel/) [Herschel Published](https://sms4smile.com/quotes/about/herschel-published-1697150/) [Nebula](https://sms4smile.com/quotes/about/nebula/) [Nebula Discovered](https://sms4smile.com/quotes/about/nebula-discovered-1697147/) [Nebulae Comets](https://sms4smile.com/quotes/about/nebulae-comets-1697146/) [Nebulae Visible](https://sms4smile.com/quotes/about/nebulae-visible-1697148/) [Purpose](https://sms4smile.com/quotes/about/purpose/) [Science](https://sms4smile.com/quotes/about/science/) [Sir-william-herschel](https://sms4smile.com/quotes/about/sir-william-herschel-171114/) [Sky](https://sms4smile.com/quotes/about/sky/) [Space](https://sms4smile.com/quotes/about/space/) [Taurus](https://sms4smile.com/quotes/about/taurus/) [Telescope](https://sms4smile.com/quotes/about/telescope/) [William-herschel](https://sms4smile.com/quotes/about/william-herschel-206714/) ## Related quotes > [ “ \[Pechblende\] einer eigenthümlichen, selbstständigen metallischen Substanz bestehe. 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