Edge-on view of the disk and clumps every 8 yr for two different observer lines of sight. Dust clumps on the top, left side of the disk are denoted with yellow, red, and blue circles, which correspond with circles shown in Figure 6. Left: The observer line of sight is at six o’clock in Figure 6. In these frames, puffs only occur on the left side. New clumps build up every ≈8–9 yr. The clumps become elongated, and the tail gets very dim. Looking at the top-down image, this behavior is noticeable in following the path of the bar feature. Right: The observer line of sight is at approximately four o’clock in the top-down image. The clumps appear as smaller features and are bright for the majority of their trajectory. At this angle, the particles going in the −z-direction move to the right of the disk, moving outward. This behavior does not match observations. The puffs have a larger projected speed in this configuration.