It’s so nice not having to mess with the blender game engine to animate physics. Was messing around with rigid bodies and forces and came up with this kind of galaxy spiral thing, the different colors represents different mass values. The force field is simply a force with a very high negative value, and I turned off gravity in the scene settings.
Check this out
and
use those as “point density particles” 
I haven’t used that feature yet but I’ll give it a try, thanks
looks more like a demonstration of an atom, but wow! I have no idea how you did that so it is just amazing to me