PHYSICIST

Johannes Franz Hartmann

1865 - 1936

Photo of Johannes Franz Hartmann

Icon of person Johannes Franz Hartmann

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.His doctorate was from the University of Leipzig in 1891 on lunar eclipses.The lunar crater Hartmann on the far side of the Moon was named in his honor. Note, however, that the asteroid 3341 Hartmann was named after William K. Read more on Wikipedia

Since 2007, the English Wikipedia page of Johannes Franz Hartmann has received more than 23,242 page views. His biography is available in 25 different languages on Wikipedia (up from 24 in 2019). Johannes Franz Hartmann is the 446th most popular physicist (down from 422nd in 2019), the 2,623rd most popular biography from Germany (down from 2,540th in 2019) and the 65th most popular German Physicist.

Memorability Metrics

  • 23k

    Page Views (PV)

  • 54.57

    Historical Popularity Index (HPI)

  • 25

    Languages Editions (L)

  • 11.32

    Effective Languages (L*)

  • 1.62

    Coefficient of Variation (CV)

Page views of Johannes Franz Hartmanns by language

Over the past year Johannes Franz Hartmann has had the most page views in the with 2,674 views, followed by Spanish (1,265), and German (1,009). In terms of yearly growth of page views the top 3 wikpedia editions are Malagasy (95.74%), Basque (71.36%), and Esperanto (52.22%)

Among PHYSICISTS

Among physicists, Johannes Franz Hartmann ranks 446 out of 851. Before him are Heinrich Rubens, Walther Meissner, Katharine Burr Blodgett, Richard C. Tolman, Gabriele Veneziano, and Meghnad Saha. After him are Lyman Spitzer, Hagen Kleinert, Louis Harold Gray, Louis-François-Clement Breguet, Boris Podolsky, and Erich Hückel.

Most Popular Physicists in Wikipedia

Go to all Rankings
Load previousLoad previous

Contemporaries

Among people born in 1865, Johannes Franz Hartmann ranks 81. Before him are Erich von Drygalski, Eduardo di Capua, Archibald Leitch, Heinrich Rubens, Eugene Botkin, and Pēteris Stučka. After him are Max Heindel, Olga Boznańska, Halid Ziya Uşaklıgil, Max Nettlau, Louis Zutter, and Max Fabiani. Among people deceased in 1936, Johannes Franz Hartmann ranks 89. Before him are Zahra Khanom Tadj es-Saltaneh, Oskar Barnack, Louis Camille Maillard, Christiaan Snouck Hurgronje, José Calvo Sotelo, and Wilhelm Meyer-Lübke. After him are Georgios Kondylis, Jean Patou, Svetozar Pribićević, Sophie, Princess of Albania, Juliette Adam, and Dezső Kosztolányi.

Others Born in 1865

Go to all Rankings
Load previousLoad previous

Others Deceased in 1936

Go to all Rankings
Load previousLoad previous

In Germany

Among people born in Germany, Johannes Franz Hartmann ranks 2,623 out of 7,253. Before him are Hennes Weisweiler (1919), Princess Isabella of Croÿ (1856), Alexander Kluge (1932), Jil Sander (1943), Johannes Fabricius (1587), and Carl Sigismund Kunth (1788). After him are Otto Weddigen (1882), Wilhelm von Kaulbach (1805), Heinrich XXIV, Count Reuss of Ebersdorf (1724), Frederick II, Duke of Mecklenburg-Schwerin (1717), Leo Löwenthal (1900), and Maximilian Henry of Bavaria (1621).

Others born in Germany

Go to all Rankings
Load previousLoad previous

Among PHYSICISTS In Germany

Among physicists born in Germany, Johannes Franz Hartmann ranks 65. Before him are Rudolf Peierls (1907), Walther Gerlach (1889), Johanna Budwig (1908), Charles Galton Darwin (1887), Heinrich Rubens (1865), and Walther Meissner (1882). After him are Erich Hückel (1896), Johann Christian Poggendorff (1796), Johann Heinrich Schulze (1687), Friedrich Kohlrausch (1840), Walter Heitler (1904), and Heinrich Barkhausen (1881).

German born Physicists

Go to all Rankings
Load previousLoad previous