Double click green flag to start simulation. Added a tail to the comet which increases of size when it gets close to the sun, and fixed some bugs. This is a simulation of some solar system. It uses simple Newtonian laws to describe how the planets move and interact. Don't consider this debugged; loads of glitches to be fixed. Use turbo mode (shift-click green flag) for faster speed of the planetary movement.
for a collab with @maximcaux
