Chaos
This activity belongs to the GeoGebra book GeoGebra Principia.
The previous construction explains the nearly perfect elliptical orbits of planets around the Sun. The "almost" is determined by the presence of other bodies. Fortunately for Earthlings, the orbits of the other planets are sufficiently distant not to disrupt our solar year too much. Here, we see what would happen if that weren't the case. This is a simplification (two bodies orbiting another in the same plane) of the famous "three body problem" 
. It is impressive to observe how such a simple construction can transform order into chaos [24].
. It is impressive to observe how such a simple construction can transform order into chaos [24].Author of the construction of GeoGebra: Rafael Losada.