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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 AstronĂ³mico 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)


^ Asimov, Asimov's Biographical Encyclopedia of Science and Technology 2nd Revised edition

External links

(Spanish) Lista de cientificos
Hartmann, Johannes Franz


Astronomy Encyclopedia

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