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Johannes Franz Hartmann

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German astronomer (1865-1936)

GermanyScientistsLived 1865 to 1936 · aged 71
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Fame49.4
MomentumNot measured
Languages25
In century#94,458

Johannes Franz Hartmann 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.

Photos 2

Hartmann at the 1910 Fourth Conference International Union for Cooperation in Solar Research at Mount Wilson ObservatoryHartmann at the 1910 Fourth Conference International Union for Cooperation in Solar Research at Mount Wilson Observatory

Scientists from Germany 6

Rolf Singer49.7Klaus-Dietrich Flade49.4Freimut Börngen49.7Melitta Schenk Gräfin von Stauffenberg49.4Cuno Hoffmeister49.8Ernst Messerschmid49.2

About this person

Country
Germany
Category
Scientists
Type
Scientist
Status
deceased
Dates
Lived 1865 to 1936 · aged 71
Written about in
25 languages

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