Johannes Kepler, Mysterium Cosmographicum. 1597.
Engraving.
Kepler proposed that the distance relationships between the six planets known at that time could be understood in terms of the five Platonic solids, enclosed within a sphere that represented the orbit of Saturn.
Charles Lacouture, Trilobe synoptique. 1890.
Chromolithograph.
From Chromatic Repertory, a reasoned and practical solution to the most common problems in the study and use of color.
