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| Keywords: Tycho instrument armillary 12.jpg Tycho Brahe drew the construction of his equatorial armillary instrument ARMILLÆ ÆQUATORIÆ used for measuring right ascensions and declinations of celestial objects Source http //www kb dk/elib/lit/dan/brahe/images/instrumentstor12 jpg Author Tycho Brahe in his Astronomiæ instauratæ mecanica Wandsbek 1598 Description source http //www kb dk/elib/lit/dan/brahe/engelsktekst/frame12-en htm PD-old Armillary spheres | ||||
