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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 20,026 page views. His biography is available in 19 different languages on Wikipedia (up from 18 in 2019). André-Louis Danjon is the 285th most popular astronomer (down from 266th in 2019), the 3,308th most popular biography from France (down from 3,021st in 2019) and the 28th most popular French Astronomer.

Memorability Metrics

  • 20k

    Page Views (PV)

  • 50.62

    Historical Popularity Index (HPI)

  • 19

    Languages Editions (L)

  • 9.20

    Effective Languages (L*)

  • 1.41

    Coefficient of Variation (CV)

Page views of André-Louis Danjons by language


Among ASTRONOMERS

Among astronomers, André-Louis Danjon ranks 285 out of 531. Before him are Edwin Ernest Salpeter, Jérôme Eugène Coggia, Liisi Oterma, Heikki A. Alikoski, John Machin, and Frank Watson Dyson. After him are Benjamin Baillaud, Raymond Smith Dugan, Henri-Alexandre Deslandres, Otto Lesser, Hermann von Struve, and Aleksander Wolszczan.

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Contemporaries

Among people born in 1890, André-Louis Danjon ranks 128. Before him are Mehmet Fuat Köprülü, Sigurd Hoel, Dion Fortune, Jüri Uluots, Mauno Pekkala, and Mark Tobey. After him are Elia Abu Madi, Phetsarath Ratanavongsa, André Gobert, Elizabeth Bolden, Henri Decoin, and Boris Delaunay. Among people deceased in 1967, André-Louis Danjon ranks 150. Before him are Enrico Dante, Georges Sadoul, Princess Dorothea of Saxe-Coburg and Gotha, Mikhail Kovalyov, Bob Anderson, and Milán Füst. After him are Greta Schröder, Fernando Paternoster, Edward Chamberlin, Siegfried Sassoon, Varian Fry, and Antonio Riberi.

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 3,308 out of 6,011. Before him are Louise Moillon (1610), Peter Fourier (1565), Andréa Ferréol (1947), Jean-Jules-Antoine Lecomte du Nouÿ (1842), Brigitte Fontaine (1939), and André Cardinal Destouches (1672). After him are Jacques Marquette (1637), Ermengarde of Anjou, Duchess of Burgundy (1018), Baude Cordier (1364), Jean René Constant Quoy (1790), Othon de la Roche (1200), and Pierre Vidal-Naquet (1930).

Others born in France

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Among ASTRONOMERS In France

Among astronomers born in France, André-Louis Danjon ranks 28. Before him are César-François Cassini de Thury (1714), Rudolph Minkowski (1895), Pierre Charles Le Monnier (1715), Laurent Cassegrain (1629), Charles Wolf (1827), and Jérôme Eugène Coggia (1849). After him are Benjamin Baillaud (1848), Henri-Alexandre Deslandres (1853), Louis Boyer (1901), Marguerite Laugier (1896), Gérard de Vaucouleurs (1918), and Adrien Auzout (1622).

French born Astronomers

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