Titius-Bode Law

Physical Law
The Titius-Bode law is the observation that the semi-major axes of successive planets of the solar system are governed by the equation:
 * $a = 4 + 2^n \times 3$

where:
 * $n = -\infty, 0, 1, 2, \ldots$ for successive planets
 * $a$ is the measure of distance such that the Earth's semi-major axes is defined as $10$.

While accurate for the planets out as far as Uranus, the law breaks down for Neptune and beyond.

Also known as
The Titius-Bode Law is also seen named as Bode's Law.