Johann Karl Friedrich Zöllner
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Zöllner, Johann Karl Friedrich
Born Nov. 8, 1834, in Berlin; died Apr. 25, 1882, in Leipzig. German astrophysicist.
Zöllner became a professor at the University of Leipzig in 1866. His principal works dealt with astronomical photometry. Zöllner designed a photometer for visual determinations of the brightness of celestial bodies. With the aid of a spectroscope, he made some of the first observations of the prominences on the sun. Zöllner also produced studies on the structure of comets and of the solar atmosphere.
WORKS“Photometrische Untersuchungen.” Annalen der Physik und Chemie, 1857, vol. 100; 1860, vol. 109.
Grundzüge einer allgemeinen Photometrie des Himmels. Berlin, 1861.
Über die Natur der Cometen, 2nd ed. Leipzig, 1872.