Quote from Tony on 08/22/16 at 21:10:24:I saw the same article you did and wondered the same. It would take a lot of particles and probably run prohibitively slow. I can see why the moon would disrupt the rings, but I can't see why the rings would settle back to normal after the moon passed.
I agree , I also cannot see why the particles return to the normal plane , except if one takes into account inelastic collisions between particles .
If there is no dissipation of energy one would observe a ring with ever lasting fringes I imagine .