The Titius-Bode Law is a prescription for calculating planetary distances, made famous by Johann Bode but first pointed out in 1766 by the German mathematician Johann Titius (1729–1796). It is that the distance to the nth planet is 0.4 + (0.3)ⁿ astronomical units (AU). The Titius-Bode Law, also known simple as Bode's Law works surprisingly well out to Uranus but then breaks down.