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PHYSICIST

Johannes Franz Hartmann

1865 - 1936

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Johannes Franz Hartmann (11 January 1865 – 13 September 1936) was a German physicist and astronomer. In 1904, while studying the spectroscopy of Delta Orionis he noticed that most of the spectrum had a shift, except the calcium lines, which he interpreted as indicating the presence of interstellar medium. He was the director of the La Plata Astronomical Observatory, Argentina, from November 1922 to May 1934, and was also known under the name Juan Hartmann. Read more on Wikipedia

Since 2007, the English Wikipedia page of Johannes Franz Hartmann has received more than 23,484 page views. His biography is available in 24 different languages on Wikipedia. Johannes Franz Hartmann is the 422nd most popular physicist (down from 373rd in 2019), the 2,543rd most popular biography from Germany (down from 2,128th in 2019) and the 63rd most popular German Physicist.

Memorability Metrics

  • 23k

    Page Views (PV)

  • 53.53

    Historical Popularity Index (HPI)

  • 24

    Languages Editions (L)

  • 10.26

    Effective Languages (L*)

  • 1.62

    Coefficient of Variation (CV)

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Among PHYSICISTS

Among physicists, Johannes Franz Hartmann ranks 422 out of 717. Before him are Yoshio Nishina, Meghnad Saha, Vladimir Fock, John C. Mather, Heinrich Barkhausen, and Martin Knudsen. After him are Jules Jamin, Mohsen Fakhrizadeh, Yulii Khariton, Walther Gerlach, Rudolf Peierls, and Evgeny Lifshitz.

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Contemporaries

Among people born in 1865, Johannes Franz Hartmann ranks 77. Before him are Max Heindel, Henri Desgrange, Friedrich, Prince of Waldeck and Pyrmont, Said Halim Pasha, Max Nettlau, and Max Fabiani. After him are Olga Boznańska, Prince Friedrich Leopold of Prussia, Pēteris Stučka, Eduardo di Capua, Aspazija, and Tan Sitong. Among people deceased in 1936, Johannes Franz Hartmann ranks 82. Before him are Oskar Barnack, Sergei Shchukin, Jean-Baptiste Charcot, Dezső Kosztolányi, Alexander Tamanian, and Charles Curtis. After him are Wilhelm Meyer-Lübke, Hu Hanmin, Jean Patou, Nahum Sokolow, Gustave Kahn, and John Gilbert.

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Others Deceased in 1936

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In Germany

Among people born in Germany, Johannes Franz Hartmann ranks 2,543 out of 6,142. Before him are Duchess Maria Anna Josepha of Bavaria (1734), Winfried Schäfer (1950), Stefan Effenberg (1968), Hajo Herrmann (1913), Carlos Schwabe (1866), and Prince Karl Anton August of Schleswig-Holstein-Sonderburg-Beck (1727). After him are Prince Adalbert of Bavaria (1886), Fritz Wepper (1941), Dieter Müller (1954), Louis II, Count Palatine of Zweibrücken (1502), Erwin Jaenecke (1890), and Nikolaus Federmann (1505).

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Among PHYSICISTS In Germany

Among physicists born in Germany, Johannes Franz Hartmann ranks 63. Before him are Wolfgang Ketterle (1957), Friedrich Paschen (1865), Johann Heinrich Schulze (1687), Walther Meissner (1882), Erich Hückel (1896), and Heinrich Barkhausen (1881). After him are Walther Gerlach (1889), Rudolf Peierls (1907), Heinrich Rubens (1865), Friedrich Kohlrausch (1840), Walter Heitler (1904), and Johann Christian Poggendorff (1796).

German born Physicists

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