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Ernst Arnold Kohlschütter (6 July 1883 – 28 May 1969) was a Germanastronomer andastrophysicist fromHalle.
In 1908 he was awarded hisPh.D. from theUniversity of Göttingen underKarl Schwarzschild.[1]
In 1911 he began working at theMount Wilson observatory, studying the spectra of theSun andstars in collaboration withWalter Sidney Adams. In 1914 they discovered that the absolute luminosity of a star is proportional to the relative intensity of the lines in thespectrum. This allowed astronomers to determine the distance of stars, includingmain sequence and giants, using thespectroscope.
He became the director of the Bonn observatory in 1925. Therein he was dedicated to astrometric studies, such as the Bonn portion ofAGK2.
The craterKohlschütter on theMoon is named after him.
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