Numerical evidence that the motion of pluto is chaotic

Science. 1988 Jul 22;241(4864):433-7. doi: 10.1126/science.241.4864.433.

Abstract

The Digital Orrery has been used to perform an integration of the motion of the outer planets for 845 million years. This integration indicates that the long-term motion of the planet Pluto is chaotic. Nearby trajectories diverge exponentially with an e-folding time of only about 20 million years.