Keywords: Tycho instrument armillary 14.jpg Tycho Brahe drew the construction of his great equatorial armillary ARMILLÆ AEQUATORIÆ MAXMIÆ SESQUIALTERO CONSTANTES CIRCULO used for measuring right ascensions and declinations of celestial objects Source http //www kb dk/elib/lit/dan/brahe/images/instrumentstor14 jpg Author Tycho Brahe in his Astronomiæ instauratæ mecanica Wandsbek 1598 Description source http //www kb dk/elib/lit/dan/brahe/engelsktekst/frame14-en htm PD-old Armillary spheres Tycho Brahe |