Astronomiæ instauratæ mechanica

Tycho Brahe's astronomical instruments 

Tycho Brahe himself described his astronomical instruments in his book Astronomiæ instauratæ mechanica, Wandsbek 1598. The illustrations and the Latin text at this website are digital reproductions from this work (now at the Royal Library of Copenhagen).

The book shows the astronomical inventions of Tycho Brahe, especially the instruments through which the stars and planets could be observed and by which distances and ascensions could be measured.

The translations

The Danish translations are taken from Nordisk Astronomisk Tidsskrift, 1933-1954 (see the bibliography). The Royal Library wishes to express its thanks to the editorial board for permission to use these translations. Instrument 26, 27 and 29, however, were translated by Helle Damgaard Andersen.

The English translation is taken from H. Ræder, E. Strömgren & B. Strömgren, Tycho Brahe's Description of his Instruments and Scientific Work, København 1946 (Det Kongelige Danske Videnskabernes Selskab). The Royal Libary wishes to express its thanks to the Royal Academy of Science for permission to use this translation.