Nicholas Copernicus’ Revolutions

Book Three
  • Jerzy Dobrzycki


Having portrayed the appearance of the fixed stars, I must pass on to the topics connected with the annual revolution. Hence I shall first discuss the shift in the equinoxes, on account of which the fixed stars too are believed to move. (I always bear in mind that the circles and poles generated by the earth’s motion appear in like form and in the same way in the heavens, as I have often remarked [II, 1], and these are the subjects treated here) [these words were written by Copernicus in the margin of fol. 71r, and later deleted].


Apparent Motion Uniform Motion Summer Solstice Vernal Equinox Annual Motion 
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Copyright information

© Edward Rosen 1978

Authors and Affiliations

  • Jerzy Dobrzycki

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