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. He oriented the work of the observatory towards astrophysics and discovered the three asteroids of the main-belt, 965 Angelica, 1029 La Plata and 1254 Erfordia at La Plata between 1921 and 1932. Read more on Wikipedia

His biography is available in different languages on Wikipedia. Johannes Franz Hartmann is the 417th most popular physicist (up from 447th in 2019), the 2,323rd most popular biography from Germany (up from 2,623rd in 2019) and the 60th most popular German Physicist.

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Among PHYSICISTS

Among physicists, Johannes Franz Hartmann ranks 417 out of 851. Before him are Oskar Klein, Philip Abelson, Charles H. Bennett, William Watson, Lyman Spitzer, and Jacques-Arsène d'Arsonval. After him are Robert W. Wood, Bruno Rossi, Georgy Flyorov, Johann Andreas Segner, John Mauchly, and Jules Jamin.

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Contemporaries

Among people born in 1865, Johannes Franz Hartmann ranks 66. Before him are Wilbur Scoville, Jehanne D'Alcy, Lala Lajpat Rai, Louis Zutter, Albéric Magnard, and Shigechiyo Izumi. After him are Pēteris Stučka, Olga Boznańska, Bronisława Dłuska, Erich von Drygalski, Aspazija, and Hantaro Nagaoka. Among people deceased in 1936, Johannes Franz Hartmann ranks 81. Before him are Alexander Tamanian, Edward Bach, Alexandros Zaimis, Jean-Baptiste Charcot, Charles Curtis, and Arvid Lindman. After him are Takahashi Korekiyo, Conrad Böcker, Hu Hanmin, Christiaan Snouck Hurgronje, Édouard Herzen, and Meir Dizengoff.

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In Germany

Among people born in Germany, Johannes Franz Hartmann ranks 2,324 out of 7,253. Before him are Jan Assmann (1938), Erich Rudorffer (1917), Henry Oldenburg (1619), Otto Henry, Elector Palatine (1502), Dieter Müller (1954), and Nico Hülkenberg (1987). After him are John II, Duke of Bavaria (1341), Prince Franz of Bavaria (1875), Albert Forster (1902), Hanns Kerrl (1887), Konrad von Thüringen (1206), and Ludwig Crüwell (1892).

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Among PHYSICISTS In Germany

Among physicists born in Germany, Johannes Franz Hartmann ranks 60. Before him are Friedrich Kohlrausch (1840), Friedrich Paschen (1865), August Kundt (1839), Manfred von Ardenne (1907), Moritz von Jacobi (1801), and Paul Drude (1863). After him are Ernst Chladni (1756), Walther Meissner (1882), Rudolf Peierls (1907), Erich Hückel (1896), Johanna Budwig (1908), and Jürgen Ehlers (1929).

German born Physicists

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