Color enhanced illustration of the plurality of worlds. "The Supreme Being has created thousands of worlds, and not one resembles the other." Voltaire's enlightened view of the cosmos influenced Leonhard Euler to apply his mathematical skills to explore the motions of celestial bodies. This schematic outlines the plurality of the worlds according Euler. The solar system is but one of many in the heavens, yet all of them obey the same forces of gravitation. Detail of illustration from Euler's, Theoria Motuum Planeterum et Cometarum, 1744.