Galactic Incident

Description

I tried to simulate a galaxy with particle systems in C++ (using the reciprocical attraction between stars this time, which my [previous "static" test](https://skfb.ly/6JyVO) did not take into account), but a minor coding error resulted in the creation of a miniature rogue black hole in it... AAaaaaahhh, the joys of programming ! The animation still ended up looking fabulous, and although the download is quite heavy *( approximately 50k particles x 60 steps = 3M vertices )*, it seems to run very smoothly once loaded !