Tychonis Brahe Astronomiae instauratae mechanica

Reproductions of three separate illustrations from "Tychonis Brahe Astronomiae instauratae mechanica" (Amsterdam, 1662); 1) Diagram of the Astronomical Trigonometric Sextant designed by the Danish astronomer Tycho Brahe to determine distances; 2) Diagram of the Equatorial Armillary Sphere to observe the stars and heavens; 3) Diagram of the Great Armillary Sphere designed to observe the stars and heavens. All three were photographed by Michael Berry.