Famous French Astronomers

Find out more about the greatest French Astronomers, including Pierre-Simon Laplace, Joseph-Louis Lagrange, Pope Sylvester II, Charles Messier and Pierre Janssen.

This ranking is based on an algorithm that combines various factors, including the votes of our users and search trends on the internet.

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 1 Pierre-Simon Laplace

Pierre-Simon Laplace.
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Famous As: Scientist
Birthdate: March 23, 1749
Sun Sign: Aries
Birthplace: Beaumont-en-Auge
Died: March 5, 1827

Though French scholar Pierre-Simon Laplace is primarily known for his work on the solar system, his research extended to areas such as mathematics and physics, apart from astronomy. Widely known as the Newton of France, he escaped being executed during the French Revolution, owing to his lack of political views.

 2 Joseph Louis Lagrange

Joseph Louis Lagrange.
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Famous As: Mathematician
Birthdate: January 25, 1736
Sun Sign: Aquarius
Birthplace: Turin, Italy
Died: April 10, 1813

Joseph Louis Lagrange was an Italian mathematician and astronomer who made significant contributions to the fields of number theory, analysis, and both classical and celestial mechanics. He served as the director of mathematics at the Prussian Academy of Sciences in Berlin for over 20 years. He later moved to France and became a member of the French Academy of Sciences. 

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 3 Giovanni Domenico Cassini

Giovanni Domenico Cassini.
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Famous As: Astronomer and Mathematician
Birthdate: June 8, 1625
Sun Sign: Gemini
Birthplace: Perinaldo, Italy
Died: September 14, 1712
Italian-French mathematician and astronomer Giovanni Domenico Cassini is best remembered for his discovery of four moons of Saturn, the computation of Jupiter’s rotational period, and the observation of the Cassini Division, or the gap between Saturn’s rings. King Louis XIV made him a member of the Académie des Sciences

 4 Charles Messier

Charles Messier.
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Famous As: Astronomer
Birthdate: June 26, 1730
Sun Sign: Cancer
Birthplace: Badonviller
Died: April 12, 1817

French astronomer Charles Messier is remembered for his pioneering tabulation of nebulae, making it easier to differentiate between nebulae and comets. King Louis XV name him The Comet Ferret. He was drawn to astronomy when he witnessed a solar eclipse and the great six-tailed comet in childhood.

 5 Guillaume Le Gentil

Guillaume Le Gentil.
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Famous As: Astronomer
Birthdate: September 12, 1725
Sun Sign: Virgo
Birthplace: Coutances, France
Died: October 22, 1792

Of French astronomer Guillaume Le Gentil’s discoveries, the most notable remain the Messier objects M32, M36, and M38. He waited for 8 years in India to observe the transit of Venus, but bad weather prevented his mission. He was mistakenly declared dead in France, but went back to reclaim his life.

 6 François Arago

François Arago
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Famous As: Astronomer, Mathematician, Physicist, Politician, Scientist, University teacher
Birthdate: February 26, 1786
Sun Sign: Pisces
Birthplace: Estagel
Died: October 2, 1853

French physicist and mathematician François Arago discovered rotatory magnetism, named Arago's rotations. He is also remembered for his research on the wave theory of light and for the reforms he introduced as the French minister of war and the navy. The Eiffel Tower has his name inscribed on it.

 7 Urbain Le Verrier

Urbain Le Verrier
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Famous As: Astronomer
Birthdate: March 11, 1811
Sun Sign: Pisces
Birthplace: Saint-Lô, France
Died: September 23, 1877

French astronomer Urbain Le Verrier revolutionized celestial mechanics by ascertaining the existence of Neptune by mathematical means. Apart from winning the Royal Society of London’s Copley Medal, he had also led the Observatory of Paris as its director. His name remains one of the 72 engraved on the Eiffel Tower.

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 8 Pierre Gassendi

Pierre Gassendi
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Famous As: Philosopher, Mathematician, Astronomer, Professor, Astrologer
Birthdate: January 22, 1592
Sun Sign: Aquarius
Birthplace: Champtercier
Died: October 24, 1655

French Catholic priest and astronomer Pierre Gassendi is remembered for his efforts to reconcile atomism with Christian ideals and for his anti-Aristotelianism. His studies included research on Epicurean philosophy. Apart from observing the transit of Mercury, he also studied the speed of sound and horizontal momentum.

 9 Camille Flammarion

Camille Flammarion
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Famous As: astronomer, writer, balloonist, science fiction writer
Birthdate: February 26, 1842
Sun Sign: Pisces
Birthplace: Val-de-Meuse
Died: June 7, 1925

French astronomer Camille Flammarion began his career as a human computer at the Paris Observatory at 16. He believed intelligent beings from Mars had tried to communicate with people on Earth in the past. He also published L'Astronomie and penned sci-fi novels such as Omega: The Last Days of the World.

 10 Pierre Louis Maupertuis

Pierre Louis Maupertuis
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Famous As: Mathematician
Birthdate: September 28, 1698
Sun Sign: Libra
Birthplace: Saint-Malo, France
Died: July 27, 1759

Pierre Louis Maupertuis was a French mathematician and man of letters. He is credited with having invented the principle of least action; his version is known as Maupertuis's principle. He was also a philosopher and his work in natural history touched upon a range of topics. He was the first President of the Prussian Academy of Science. 

 11 Pierre Janssen

Pierre Janssen
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Famous As: Astronomer
Birthdate: February 22, 1824
Sun Sign: Pisces
Birthplace: Paris, France
Died: December 23, 1907

Apart from discovering helium, astronomer Pierre Janssen also found out a way of observing solar prominences with an eclipse. Permanently lamed due to a childhood accident, Janssen had begun his career as a bank clerk. He later taught physics, too. His photographic revolver paved the path for the motion-picture

 12 Jean Sylvain Bailly

Jean Sylvain Bailly
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Famous As: Astronomer
Birthdate: September 15, 1736
Sun Sign: Virgo
Birthplace: Paris, France
Died: November 12, 1793

A major figure of the French Revolution, Jean Sylvain Bailly is remembered for leading the Tennis Court Oath. He also made a name for himself as an astronomer and studied the Halley’s Comet and the satellites of Jupiter extensively. As a mayor of Paris, he later defended Marie-Antoinette and was guillotined.

 13 Jean-Baptiste Biot

Jean-Baptiste Biot
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Famous As: Mathematician, Physicist, Astronomer, Civil engineer, Engineer, Professor
Birthdate: April 21, 1774
Sun Sign: Taurus
Birthplace: Paris
Died: February 3, 1862

Jean-Baptiste Biot was a French physicist, mathematician, and astronomer. He was a co-discoverer of what became known as the Biot-Savart law of magnetostatics. He is also credited with establishing the reality of meteorites. He made major contributions to the fields of optics and magnetism as well. Cape Biot in eastern Greenland is named in his honor. 

 14 Hippolyte Fizeau

Hippolyte Fizeau
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Famous As: Physicist, Astronomer
Birthdate: September 23, 1819
Sun Sign: Libra
Birthplace: Paris
Died: September 18, 1896

Physicist Hippolyte Fizeau is best remembered for conducting the Fizeau experiment, named after him, which measured the speed of light. His other achievements include his contribution to the discovery of the Doppler effect and his description of the capacitor to improve the efficiency of the induction coil.

 15 Levi ben Gershom

Levi ben Gershom
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Famous As: Philosopher
Birthdate: 1288 AD
Birthplace: Bagnols-sur-Ceze, France
Died: April 20, 1344

 Levi ben Gershon was a medieval French Jewish mathematician, philosopher, astronomer, and Talmudic scholar, famed for his rigid Aristotelianism. A prolific author, he has left several works on mathematical operations, trigonometry, geometry and philosophy, including The Book of the Wars of the Lord. While his bold expression and unconventional thoughts invited criticism, they continued to exert influences till nineteenth century.

 16 Nicolas Louis de Lacaille

Nicolas Louis de Lacaille
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Famous As: French astronomer
Birthdate: March 15, 1713
Sun Sign: Pisces
Birthplace: Rumigny, Ardennes
Died: March 21, 1762

Nicolas Louis de Lacaille was a French astronomer and geodesist. He is credited to have named 14 out of the 88 constellations. He studied rhetoric, theology, and philosophy and became an abbot. He later found employment as a professor of mathematics in the Mazarin college and was made a foreign member of the Royal Swedish Academy of Sciences. 

 17 Alexis Clairaut

Alexis Clairaut
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Famous As: Mathematician
Birthdate: May 13, 1713
Sun Sign: Taurus
Birthplace: Paris, France
Died: May 17, 1765

Born to a math teacher, French mathematician and physicist Alexis Clairaut had mastered calculus at 10. He is best remembered for devising the Clairaut’s equation and for validating the scientific claims of Sir Isaac Newton. He was part of an expedition to Lapland to ascertain a degree of the meridian arc.

 18 Jean Richer

Jean Richer
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Famous As: Astronomer
Birthdate: 1630 AD
Birthplace: France
Died: 1696 AD

Known for his celestial observations and experiments carried out in Cayenne, Jean Richer was a French astronomer, whose works brought about a revolution in the field of astronomy, helping to determine the distances between Earth and Mars, and between Earth and Sun. In addition, they also established that the Earth is actually an oblate spheroid, not sphere, as was believed.

 19 Oronce Finé

Oronce Finé
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Birthdate: 0000 AD

Sixteenth-century French mathematician Oronce Finé was also a skilled cartographer. Some of his best works remain his heart-shaped map of the world, his ivory sundial, and his woodcut map of France. He also earned a degree in medicine and was imprisoned for opposing the French king’s concordat to universities.

 20 Jean Picard

Jean Picard
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Birthdate: July 21, 1620
Sun Sign: Cancer
Birthplace: La Flèche, France
Died: July 12, 1682

Jean Picard was a 17th-century French astronomer. He is known for being the first person to measure the size of the Earth to a reasonable degree of accuracy. He was also the first to attach a telescope with crosswires to a quadrant. He is credited with developing the standard method for measuring the right ascension of a celestial object. 

 21 Jérôme Lalande

Jérôme Lalande
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Famous As: Astronomer
Birthdate: July 11, 1732
Sun Sign: Cancer
Birthplace: Bourg-en-Bresse, France
Died: April 4, 1807

Jérôme Lalande was a French astronomer, freemason, and writer. His parents wanted him to study law, but he became a disciple of astronomer Joseph-Nicholas Delisle instead. He went on to have a brilliant career as an astronomer and was awarded the Lalande Prize by the French Academy of Sciences. His daughter Marie-Jeanne de Lalande also became an astronomer. 

 22 Pierre Méchain

Pierre Méchain
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Famous As: Astronomer
Birthdate: August 16, 1744
Sun Sign: Leo
Birthplace: Laon, France
Died: September 20, 1804

Born to a ceiling designer, Pierre Méchain had to quit studies due to poverty. However, his talent in math earned him work as a hydrographer. A surveyor and astronomer, who spent most of his time studying deep-sky objects, he also gained fame for measuring the meridian arc from Dunkirk to Barcelona.

 23 Joseph Nicollet

Joseph Nicollet
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Famous As: Geographer
Birthdate: July 24, 1786
Sun Sign: Leo
Birthplace: Cluse, France
Died: September 11, 1843

French explorer and mathematician Joseph Nicollet had begun his career as a math teacher at age 19. Faced with financial issues, he later moved to the U.S., where he was financially helped by a wealthy family. His exploration of the Mississippi and Missouri rivers helped him chart maps of the region.

 24 Alexis Bouvard

Alexis Bouvard
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Famous As: Astronomer
Birthdate: June 27, 1767
Sun Sign: Cancer
Birthplace: Contamines, France
Died: June 7, 1843

Alexis Bouvard was a French astronomer, particularly noted for predicting the existence of an eighth planet in the solar system. Also known for discovering eight comets, he wrote Tables astronomiques of Jupiter, Saturn and Uranus; but when his tables for Uranus failed, he correctly hypothesized that an unknown planet, later discovered as Neptune, is causing irregularity in its movement.

 25 Jacques Cassini

Jacques Cassini
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Famous As: Astronomer
Birthdate: February 18, 1677
Sun Sign: Aquarius
Birthplace: Paris, France
Died: April 16, 1756

Born to astronomer Giovanni Domenico Cassini, the director of the Paris Conservatory, Jacques Cassini, too, followed in his father’s footsteps. He opposed Sir Isaac Newton’s theory of gravity and released the preliminary tables of the satellites of Saturn. He also helped measure the longitude line between Dunkerque and Perpignan.

 26 Nicolas-Claude Fabri de Peiresc

Nicolas-Claude Fabri de Peiresc
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Famous As: Astronomer
Birthdate: December 1, 1580
Sun Sign: Sagittarius
Birthplace: Belgentier, France
Died: June 24, 1637

The son of an affluent surgeon from Provence, Nicolas-Claude Fabri de Peiresc grew up to be a famous astronomer, known mostly for his research on longitudes. He is also remembered for discovering the Orion Nebula and owned a huge collection of coins, which he used to study history.

 27 César-François Cassini de Thury

César-François Cassini de Thury
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Famous As: Astronomer
Birthdate: June 17, 1714
Sun Sign: Gemini
Birthplace: Thury-sous-Clermont, France
Died: September 4, 1784

French astronomer and surveyor César-François Cassini de Thury followed in his father Jacques Cassini’s footsteps to create an authentic topographical map of France. His Carte de Cassini was the first map which charted an entire country based on its topography. He had also been the director of the Paris Observatory.

 28 Jean-Baptiste-Joseph Delambre

Jean-Baptiste-Joseph Delambre
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Famous As: Mathematician
Birthdate: September 19, 1749
Sun Sign: Virgo
Birthplace: Amiens, France
Died: August 19, 1822

It is believed Jean-Baptiste-Joseph Delambre had acquired his habit of reading from his fear of losing his eyesight. He later became a professor of astronomy and served Paris Observatory as its director. He also penned significant works such as Histoire de l'astronomie. His name remains engraved on the Eiffel Tower.

 29 William Of Conches

William Of Conches
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Famous As: Philosopher
Birthdate: 1090 AD
Birthplace: Conches, France
Died: 1154 AD

Twelfth-century French astronomer and scholastic philosopher William of Conches believed in the atomistic theory of nature. His works consisted of one of the earliest written works on ethics and discussions of Plato’s works. Part of the School of Chartres, he had also gained fame as a skilled grammarian.

 30 Dominique, comte de Cassini

Dominique, comte de Cassini
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Famous As: Astronomer
Birthdate: June 30, 1748
Sun Sign: Cancer
Birthplace: Paris, France
Died: October 18, 1845

The son of renowned French astronomer César-François Cassini de Thury, Dominique, comte de Cassini followed in his father’s footsteps to serve as the director of the Paris Observatory. He also completed the map of France that his father had begun. His monarchist ideals got him imprisoned by the revolutionary government.

 31 Joseph-Nicolas Delisle

Joseph-Nicolas Delisle
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Famous As: Astronomer
Birthdate: April 4, 1688
Sun Sign: Aries
Birthplace: Paris, France
Died: September 11, 1768

French astronomer Joseph-Nicolas Delisle is best known for inventing the temperature scale known as the Delisle scale. He also studied the rings of Saturn and spent 22 years in Russia, training budding astronomers there. He also suggested a collaborative effort of scientists to study the 1761 transit of Venus.

 32 Gérard de Vaucouleurs

Gérard de Vaucouleurs
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Famous As: Astronomer
Birthdate: April 25, 1918
Sun Sign: Taurus
Birthplace: Paris, France
Died: October 7, 1995

After graduating from the Sorbonne and serving the army in World War II, French astronomer Gérard de Vaucouleurs focused on astronomy and later conducted extensive studies on galaxies. He often collaborated with his astronomer wife, Antoinette de Vaucouleurs, with whom he co-authored the Third Reference Catalogue of Bright Galaxies.

 33 Charles-Eugène Delaunay

Charles-Eugène Delaunay
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Famous As: Astronomer
Birthdate: April 9, 1816
Sun Sign: Aries
Birthplace: Lusigny-sur-Barse, France
Died: August 5, 1872

Charles-Eugène Delaunay was a French mathematician and astronomer, known for his theory of lunar motion, explained in two volumes of La Théorie du mouvement de la lune.  A prolific writer, he wrote several other books, which contributed to the development of planetary-motion theories, functional analysis and computer algebra. In his last years, he served as the director of Paris Observatory.

 34 Johannes de Muris

Johannes de Muris
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Famous As: Philosopher
Birthdate: 1290 AD
Birthplace: Normandy, France
Died: 1351 AD

Johannes de Muris was not only an important philosopher and music theorist but also a respected mathematician and astronomer. His treatises titled Ars nove musice played a prominent role in the development of a 14th-century musical style called Ars nova which flourished in France in the late Middle Ages.

 35 Carl August von Steinheil

Carl August von Steinheil
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Famous As: Physicist
Birthdate: October 12, 1801
Sun Sign: Libra
Birthplace: Ribeauvillé, France
Died: September 14, 1870

German physicist Carl August von Steinheil is best remembered for his pioneering work in optics, photometry, and telegraphy. His ideas gave rise to new designs in telegraphic receivers which in turn decreased the cost of telegraphic lines to a great extent. He also contributed as a teacher, teaching mathematics and physics at Munich University.

 36 Audouin Dollfus

Audouin Dollfus
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Famous As: Astronomer
Birthdate: November 12, 1924
Sun Sign: Scorpio
Birthplace: Paris, France
Died: October 1, 2010

Audouin Dollfus was a French aeronaut and astronomer. He worked at the Meudon Observatory where he oversaw the operations of the Laboratory of Solar System Physics. Dollfus was the first person to use a stratospheric balloon to carry out astronomical observations. He is credited with discovering Janus, Saturn’s 10th known satellite.

 37 Bernard Lyot

Bernard Lyot
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Famous As: Astronomer
Birthdate: February 27, 1897
Sun Sign: Pisces
Birthplace: Paris, France
Died: April 2, 1952

Bernard Lyot was a French astronomer best remembered for his invention of the Coronagraph, a device to observe the corona at any given time. He made immense contributions to the Meudon Observatory where he served as Chief Astronomer late in his career. He was honored with the prestigious Catherine Wolfe Bruce Gold Medal in 1947.

 38 Henri-Alexandre Deslandres

Henri-Alexandre Deslandres
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Famous As: Astronomer
Birthdate: July 24, 1853
Sun Sign: Leo
Birthplace: Paris, France
Died: January 15, 1948

Henri-Alexandre Deslandres was a French astronomer who served as the director of the Meudon Observatory. From 1907 to 1909, he also served as the president of the popular French astronomical society, the Société Astronomique de France. In 1921, he was honored with the Catherine Wolfe Bruce Gold Medal.

 39 Félix Tisserand

Félix Tisserand
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Famous As: Astronomer
Birthdate: January 13, 1845
Sun Sign: Capricorn
Birthplace: Nuits-Saint-Georges, France
Died: October 20, 1896

Félix Tisserand was a French astronomer who served as the director of the Paris Observatory from 1892 until his death in 1896. From 1893 to 1895, he served as the president of the French astronomical society, the Société Astronomique de France (SAF). One of the Moon's craters Tisserand is named in his honor.

 40 André-Louis Danjon

André-Louis Danjon
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Famous As: Astronomer
Birthdate: April 6, 1890
Sun Sign: Aries
Birthplace: Caen, France
Died: April 21, 1967

André-Louis Danjon was a French astronomer who made immense contribution to the field of astronomy by designing the impersonal astrolabe which is currently known as the Danjon astrolabe. His contribution led to an improvement in the precision of optical astrometry. He also served as the director of the Observatory of Strasbourg and the Paris Observatory between 1930 and 1963.

 41 Jacob ben Machir ibn Tibbon

Jacob ben Machir ibn Tibbon
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Famous As: Astronomer
Birthdate: 1236 AD
Birthplace: Marseille, France
Died: November 30, 1304

Jacob ben Machir ibn Tibbon was a French Jewish physician, astronomer, and translator. A highly respected physician, Jacob also made significant contributions to astronomy in the Middle Ages. He is also credited with translating the Arabic versions of Ptolemy’s Almagest and Euclid’s Elements into Hebrew.

 42 Jean-Baptiste-Gaspard Bochart de Saron

Jean-Baptiste-Gaspard Bochart de Saron
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Famous As: Astronomer
Birthdate: January 16, 1730
Sun Sign: Capricorn
Birthplace: Paris, France
Died: April 20, 1794

Jean-Baptiste-Gaspard Bochart de Saron was a French natural scientist and lawyer. He is best remembered for his contributions to astronomy. He studied the orbits of comets and worked alongside fellow astronomers like J.D. Cassini and Charles Messier. He also helped Charles Messier observe the orbit of the then-unidentified planet Uranus.

 43 Édouard Gaston Deville

Édouard Gaston Deville
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Famous As: Surveyor
Birthdate: February 21, 1849
Sun Sign: Pisces
Birthplace: La Charité, France
Died: September 21, 1924

Édouard Gaston Deville was a surveyor. He is credited with perfecting a working method of photogrammetry. His invention proved useful to many Canadian surveyors who used his photo-topography to map more than 80,000 square kilometers. His invention was later used to create aerial photographs for surveying regions with high elevations as well as flat and remote parts of a nation.

 44 Jean Fernel

Jean Fernel
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Famous As: Physician
Birthdate: 1497 AD
Birthplace: Montdidier, France
Died: April 26, 1558

 45 Claude-Louis Mathieu

Claude-Louis Mathieu
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Famous As: Mathematician
Birthdate: November 25, 1783
Sun Sign: Sagittarius
Birthplace: Mâcon, France
Died: March 5, 1875

Claude-Louis Mathieu was a French astronomer and mathematician. He worked at the Paris Observatory and also taught astronomy at the Collège de France. He was honored with the prestigious Lalande Prize in 1808 and 1815.