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Johannes Fabricius
Frisian/German astronomer and a discoverer of sunspots
Johannes Fabricius


  • Extract from De Maculis in Sole observatis (1611) translated by H. L. Crosby in "The history of the discovery of solar spots" by Walter M. Mitchell in Popular Astronomy, volume 24 (1916)


Works by this author published before January 1, 1924 are in the public domain worldwide because the author died at least 100 years ago. Translations or editions published later may be copyrighted. Posthumous works may be copyrighted based on how long they have been published in certain countries and areas.