Charles Messier
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Charles Messier (1730–1817) was a French astronomer best known for compiling a catalogue of 110 nebulae and star clusters, now called the Messier objects, each designated by the letter M and a number from 1 to 110. His primary motivation for creating this list was to aid fellow observers in distinguishing between permanent, fixed diffuse objects in the sky and the transient, moving comets that he hunted. Born in Badonviller, Lorraine, as the tenth of twelve children, Messier lost his father at age eleven and developed an early interest in astronomy after witnessing a spectacular six-tailed comet in 1744 and an annular solar eclipse in 1748. He began his career in 1751 working for Joseph Nicolas Delisle, the French Navy’s astronomer, who taught him to keep meticulous observation records. His first documented observation was the transit of Mercury in 1753. Messier’s comet-hunting work earned him the nickname “Ferret of Comets” from King Louis XV, and he discovered 13 comets over his lifetime. He was elected a fellow of the Royal Society in 1764, a foreign member of the Royal Swedish Academy of Sciences in 1769, and a member of the French Academy of Sciences in 1770. The catalogue, compiled with assistance from Pierre Méchain, includes 39 galaxies, 4 planetary nebulae, 7 other nebulae, 26 open clusters, and 29 globular clusters. Messier observed using a 100 mm refracting telescope at the Hôtel de Cluny in Paris, covering the sky from the north celestial pole to about −35.7° declination. The first version, published in 1774, contained 45 objects, only 17 of which he discovered himself. The final catalogue, published in 1781, listed 103 objects; seven more were later accepted as official, bringing the total to 110. Near his death, Messier self-published a booklet linking the great comet of 1769 to Napoleon’s birth. He is buried in Père Lachaise Cemetery, and his legacy includes the lunar crater Messier and asteroid 7359 Messier named in his honor.
- field
- Astronomy
- nationality
- French
Lore & Background
Charles Messier, a French astronomer, is best known for his catalogue of 110 nebulae and star clusters, now called the Messier objects, each designated with the letter M and a number from 1 to 110. His primary goal in creating this catalogue was to help astronomers differentiate between permanent, fixed diffuse objects in the sky and transient comets. As a dedicated comet hunter, Messier frequently encountered these stationary, visually diffuse objects, which could easily be mistaken for comets. To avoid wasting time on them, he compiled a list in collaboration with his friend and assistant Pierre Méchain, who likely discovered at least 20 of the entries. The catalogue includes 39 galaxies, 4 planetary nebulae, 7 other types of nebulae, 26 open star clusters, and 29 globular star clusters. Messier conducted his observations using a 100-millimeter refracting telescope from the Hôtel de Cluny in downtown Paris. The catalogue covers only the sky visible from that location, from the north celestial pole to a declination of about -35.7 degrees. The first version, published in 1774, contained 45 objects, only 17 of which were discovered by Messier himself; the rest were previously noted by other astronomers. By 1780, the catalogue had grown to 80 objects, and the final version, published in 1781, listed 103. Between 1921 and 1966, evidence emerged for seven additional objects observed by Messier or Méchain shortly after the final publication, and these (M 104 through M 110) are now accepted as official. Messier also discovered 13 comets and co-discovered another. His legacy includes the lunar crater Messier and asteroid 7359 Messier, both named in his honor.
Reader's Guide
The Messier objects, designated M1 through M110, are still widely used today due to their relative brightness and accessibility. His work was driven by a practical need to avoid confusing permanent deep-sky objects with transient comets, a goal that inadvertently created a lasting reference for astronomers. The catalogue includes 39 galaxies, 4 planetary nebulae, 7 other nebulae, 26 open clusters, and 29 globular clusters. Messier also discovered 13 comets and co-discovered another. Despite a late-life attempt to curry favor with Napoleon through astrological claims, his scientific contributions endure as a foundational resource for observing the night sky.
Did You Know?
- Messier was the tenth of twelve children, and six of his siblings died young.
- He was nicknamed 'Ferret of Comets' by King Louis XV.
- His catalogue was originally created to help distinguish comets from permanent diffuse objects.
Frequently Asked Questions
What was Charles Messier's nationality and field of work?
He was French by nationality and worked in the field of astronomy, dedicating his career to observing and cataloguing nebulae, star clusters, and other celestial objects.
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