This volume contains critical editions of all of Copernicus s minor mathematical and scientific works with commentaries and German translations Taking into account the latest developments in Copernicus research it includes the Commentariolus the Wapowski letter on the movement of the eighth sphere the Notebook in Uppsala with Copernicus s astronomical observations the Trigonometry the Table of sunrises and sunsets and for the first time all the mathematical and scientific notes Copernicus wrote in books of his library Furthermore Johannes Werner s Treatise on the movement of the eighth sphere was critically edited and translated into German for the first time since the Editio princeps in 1522