The starting point of this project was the 2D numerical particle simulation of planetesimal formation by Andreas Schreiber. The standard visualization is simple particle splatting in 2D and rendering all snapshots as an animation. However, because of the shearing-sheet boundary conditions, this method is inappropriate to track the forming planetesimals.
Polar galaxy merger
CALIFA reveals prolate rotation in massive early-type galaxies: A polar galaxy merger origin?