Christoph Rothmann und die Auflösung der himmlischen Sphären; Christoph Rothmann und die Auflösung der himmlischen Sphären; Christoph Rothmann and the dispersal of the celestial spheres. The letters to the Landgrave of Hessen-Kassel of 1585.
Prepared by the new star of 1572 and the comet of 1577, the comet of 1585 led to the explicit and definitive elimination of the concept of the solid heavenly spheres. On the basis of precise observations of the comet, Christoph Rothmann in Kassel developed the concept of a fluid heaven consisting of pure air. This combination of experience and theory, together with his Copernicanism, illustrates Rothmann's importance in the history of cosmology. An appendix contains five previously unpublished letters from Rothmann to the landgrave Wilhelm IV on the subject of the comet, and also the imperial privilege granted to Rothmann to publish several astronomical studies.
Acta Historica Astronomiae
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