ASTRONOMER

André-Louis Danjon

1890 - 1967

Photo of André-Louis Danjon

Icon of person André-Louis Danjon

André-Louis Danjon (French: [ɑ̃dʁelwi dɑ̃ʒɔ̃]; 6 April 1890 – 21 April 1967) was a French astronomer born in Caen to Louis Dominique Danjon and Marie Justine Binet.Danjon devised a method to measure "earthshine" on the Moon using a telescope in which a prism split the Moon's image into two identical side-by-side images. By adjusting a diaphragm to dim one of the images until the sunlit portion had the same apparent brightness as the earthlit portion on the unadjusted image, he could quantify the diaphragm adjustment, and thus had a real measurement for the brightness of earthshine. Read more on Wikipedia

Since 2007, the English Wikipedia page of André-Louis Danjon has received more than 19,752 page views. His biography is available in 19 different languages on Wikipedia. André-Louis Danjon is the 266th most popular astronomer (up from 285th in 2019), the 3,177th most popular biography from France (up from 3,295th in 2019) and the 26th most popular French Astronomer.

Memorability Metrics

  • 20k

    Page Views (PV)

  • 52.88

    Historical Popularity Index (HPI)

  • 19

    Languages Editions (L)

  • 10.63

    Effective Languages (L*)

  • 1.31

    Coefficient of Variation (CV)

Page views of André-Louis Danjons by language

Over the past year André-Louis Danjon has had the most page views in the with 2,403 views, followed by French (1,684), and Chinese (1,507). In terms of yearly growth of page views the top 3 wikpedia editions are Catalan (77.63%), Slovak (51.04%), and Norwegian (Nynorsk) (46.15%)

Among ASTRONOMERS

Among astronomers, André-Louis Danjon ranks 266 out of 644. Before him are Fred Lawrence Whipple, Maria Clara Eimmart, Sherburne Wesley Burnham, Josep Comas i Solà, Otto Struve, and Seth Carlo Chandler. After him are William Cranch Bond, Guido Bonatti, Jean-Louis Pons, Theodor von Oppolzer, Philippe van Lansberge, and Niccolò Zucchi.

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Contemporaries

Among people born in 1890, André-Louis Danjon ranks 121. Before him are Erik Heinrichs, Michał Rola-Żymierski, Ahmad Kasravi, Princess Dagmar of Denmark, Fritz Busch, and Elizabeth Bolden. After him are Henny Porten, Dion Fortune, Walter Hasenclever, Elia Abu Madi, Sigurd Hoel, and André Gobert. Among people deceased in 1967, André-Louis Danjon ranks 128. Before him are Enrico Dante, Bob Anderson, Holland Smith, Tudor Arghezi, José Martínez Ruiz, and Geraldine Farrar. After him are Antonio Moreno, Péter Palotás, George S. Robertson, Mikhail Kovalyov, Fatima Jinnah, and Sydir Kovpak.

Others Born in 1890

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Others Deceased in 1967

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In France

Among people born in France, André-Louis Danjon ranks 3,177 out of 6,770. Before him are Michel Ocelot (1943), Lucien Quélet (1832), Gérard Darmon (1948), Jacques Blanchard (1600), Gustave Lanson (1857), and Pedro Henrique of Orléans-Braganza (1909). After him are Mary of Burgundy, Duchess of Savoy (1386), Eugène Emmanuel Amaury Duval (1808), Jacques-André Naigeon (1738), Henri Meilhac (1831), Aimeric de Peguilhan (1200), and Bernard Morel (1925).

Others born in France

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Among ASTRONOMERS In France

Among astronomers born in France, André-Louis Danjon ranks 26. Before him are Jérôme Eugène Coggia (1849), Guillaume Le Gentil (1725), Jean Fernel (1497), César-François Cassini de Thury (1714), Charles Wolf (1827), and Laurent Cassegrain (1629). After him are Jean-Louis Pons (1761), Henri-Alexandre Deslandres (1853), Rudolph Minkowski (1895), Henri Joseph Anastase Perrotin (1845), Antoine Darquier de Pellepoix (1718), and Pierre Charles Le Monnier (1715).

French born Astronomers

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