Author:Friedrich von Hahn

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Friedrich von Hahn
German nobleman, a philosopher and astronomer


  • "Observations on the spots of the sun, and the nature of the light of that luminary" in The Philosophical Magazine, series 1, volume 11, issue 41. pages 39–44 (1801)

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.