Looks like a binary star, similar to the two suns of Tatooine. http://en.wikipedia.org/wiki/Binary_star#mediaviewer/File:Orbit5.gif http://en.wikipedia.org/wik

Looks like a binary star, similar to the two suns of Tatooine. http://en.wikipedia.org/wiki/Binary_star#mediaviewer/File:Orbit5.gif http://en.wikipedia.org/wiki/Binary_star#mediaviewer/File:Or... OP: This is an amazing tool to learn the sensitivity of dynamical systems to initial conditions. Well done!