Hertzsprung (right) and Karl Schwarzschild in front of the Göttingen Observatory building in 1909.
Copenhagen, Denmark8 October 1873
|Died||21 October 1967 (aged 94)|
|Alma mater||Copenhagen Polytechnic (DTU)|
|Known for||Hertzsprung–Russell diagram|
|Awards||Bruce Medal 1937|
In 1913 he determined the distances to several Cepheid variable stars in terms of parallax, and was thus able to calibrate the relationship discovered by Henrietta Leavitt (the discoverer of Cepheid variables) between their periods and luminosity. In this determination he made a mistake, possibly a slip of the pen, putting the stars 10 times too close; he used this relationship to estimate the distance to the nearby galaxy the Small Magellanic Cloud. From 1919 to 1946 Hertzsprung worked at Leiden Observatory in the Netherlands, starting in 1937 as director. Among his graduate students at Leiden was Gerard Kuiper.
- Sky & Telescope, January, 1968, Sky Publishing Corporation, Cambridge
- Hertzsprung, E., "Über die räumliche Verteilung der Veränderlichen vom δ Cephei-Typus." Astronomischen Nachrichten, 196 p. 201–210 (1913)