Observationes septem cometarum. Ex libris manuscriptis qui Havniae in magna bibliotheca regia adservantur, nunc primum edidit F. R. Friis.
(29,5 x 24 cm). (2) VIII (2) 120 S. Mit Frontispiz und 4 lithographierten Tafeln. Moderner Halbleinwandband im Stil der Zeit.
Kopenhagen, Stehen, 1867.
Erste Augabe. - "His studies of this comet became another milestone in the history of science. First of all, Tycho was able to establish that the comet was located above the sphere of the moon... Second, Tycho demonstrated that the path of the comet cut across the orbits of several planets, proving they were not borne on solid crystallin spheres... Third, Tycho began to analyze the position of the comet within the planetary system from a Copernican perspective... On this basis, he gradually began to develop a new understanding of the whole planetary system" (Christianson, On Tycho's Island S. 63). - Nahezu fleckenfreies und wohlerhaltenes Exemplar