Kees de Jager

1921 - 2021

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Cornelis "Kees" de Jager (pronounced [ˈkeːz də ˈjaːɣər]; 29 April 1921 – 27 May 2021) was a Dutch astronomer who specialized in predicting solar variation to assess the Sun's impact on future climate. He was the General Secretary of the IAU from 1967 to 1973 and former director of the observatory at Utrecht. Read more on Wikipedia

Since 2007, the English Wikipedia page of Kees de Jager has received more than 29,806 page views. His biography is available in 17 different languages on Wikipedia (up from 16 in 2019). Kees de Jager is the 447th most popular astronomer (down from 355th in 2019), the 764th most popular biography from Netherlands (down from 591st in 2019) and the 20th most popular Dutch Astronomer.

Memorability Metrics

  • 30k

    Page Views (PV)

  • 47.74

    Historical Popularity Index (HPI)

  • 17

    Languages Editions (L)

  • 5.43

    Effective Languages (L*)

  • 1.73

    Coefficient of Variation (CV)

Page views of Kees de Jagers by language

Over the past year Kees de Jager has had the most page views in the with 3,027 views, followed by German (2,662), and English (1,997). In terms of yearly growth of page views the top 3 wikpedia editions are Esperanto (40.00%), Simple English (21.40%), and Swedish (18.66%)


Among astronomers, Kees de Jager ranks 447 out of 644Before him are Warren De la Rue, Brian Schmidt, Johann Friedrich Julius Schmidt, Zinaida Aksentyeva, Henry L. Giclas, and Willem Jacob Luyten. After him are Edward Pigott, Horace W. Babcock, Fyodor Bredikhin, Benjamin Banneker, Charles W. Juels, and Frank Schlesinger.

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Among people born in 1921, Kees de Jager ranks 315Before him are Isabella Bashmakova, George Nader, Ferenc Karinthy, Ottavio Missoni, Alan Freed, and Sahir Ludhianvi. After him are Jeanne Demessieux, Tafari Benti, Antonino Rocca, Ilka Gedő, Mikayil Abdullayev, and Egon Jönsson. Among people deceased in 2021, Kees de Jager ranks 391Before him are Ramsey Clark, Lothar Metz, Francesco Morini, Vera Nikolić, Mauro Bellugi, and István Csom. After him are Fausta Morganti, Lee Wan-koo, Modibo Keita, Curtis Fuller, Shlomo Hillel, and Darlene Hard.

Others Born in 1921

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Others Deceased in 2021

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In Netherlands

Among people born in Netherlands, Kees de Jager ranks 764 out of 1,646Before him are Andries Jonker (1962), Greetje Kauffeld (1939), Thomas van Erpe (1584), Willem Piso (1611), Willem Bilderdijk (1756), and Simone Simons (1985). After him are Johan Boskamp (1948), Hans van Mierlo (1931), Fred Rutten (1962), Eddy Pieters Graafland (1934), Pieter Cort van der Linden (1846), and Frans van der Lugt (1938).

Among ASTRONOMERS In Netherlands

Among astronomers born in Netherlands, Kees de Jager ranks 20Before him are Eise Eisinga (1744), Adriaan van Maanen (1884), Bart Bok (1906), Dirk Brouwer (1902), Hendrik van Gent (1900), and Frederik Kaiser (1808). After him are Ewine van Dishoeck (1955).