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]
Johannes Franz Hartmann
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.
Asteroids discovered: 3 965 Angelica November 4, 1921
1029 La Plata April 28, 1924
1254 Erfordia May 10, 1932
See also
Hartmann (crater)
References
^ Asimov, Asimov's Biographical Encyclopedia of Science and Technology 2nd Revised edition
External links
(Spanish) Lista de cientificos
Hartmann, Johannes Franz
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