Tychonis Brahei Dani Hyperaspistes
Tychonis Brahei Dani Hyperaspistes is a 1625 Frankfurt astronomy treatise by Johannes Kepler, printed by Gottfried Tampach, defending Tycho Brahe's system against Scipione Chiaramonti and Galileo. The pictures are plain line diagrams of celestial spheres and geometric constructions: half-circle arcs with lettered points, intersecting great circles, and triangles drawn over the page's faint printed text. A designer could take their clean, schematic diagram language, with lettered labels and thin precise strokes, as a model for technical figures.
