Johannes Franz Hartmann
| Johannes Franz Hartman | |
|---|---|
| File:Johannes Franz Hartmann.jpg | |
| Born | January 11, 1865 Erfurt, Saxony |
| Died | Script error: The function "death_date_and_age" does not exist. Göttingen |
| Citizenship | German |
| Nationality | German |
| Fields | Mineralogist |
| Institutions | Astrophysical Institute Potsdam |
| Alma mater | University of Leipzig |
| Known for | Discovering interstellar medium. |
Johannes Franz Hartmann (January 11, 1865 – September 13, 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[1][2]
He was the director of the Observatorio Astronómico de La Plata from November 1922 to May 1934. He oriented the work of the observatory towards astrophysics. He discovered three asteroids.
| 965 Angelica | November 4, 1921 |
| 1029 La Plata | April 28, 1924 |
| 1254 Erfordia | May 10, 1932 |
His doctorate was from the University of Leipzig in 1891 on lunar eclipses.[3]
See also
- Hartmann crater, on the far side of the moon
- Hartman mask, a tool to help focusing telescope
References
- ↑ Asimov, Asimov's Biographical Encyclopedia of Science and Technology 2nd Revised edition
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
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External links
- (Spanish) Lista de cientificos
- Hartmann, Johannes Franz
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