Interactive animation tracing the evolution of the SNN groups (Table 1) (colored circles) backward (−10 Myr) and forward (+10 Myr) in time in the Orion reference frame assuming a constant speed. Thin dotted lines show the trace of each group’s motion. Each panel in the static version shows a different view point of the groups’ present-day positions. The groups’ colors at t = 0 represent their isochrone-derived ages and change correspondingly to reflect their ages at different time steps. Sizes indicate the number of stars they contain. Throughout the animation, filled circles become open circles if the chosen time is prior to a group’s formation time. The four most massive groups are indicated by the arrows and labels. Moving the time slider left moves the groups back in time, and moving it to the right moves them forward in time. The interactive animation can be found here, or in the online version of the published article.

An interactive version of this figure is available in the online journal.