Three-dimensional distribution of the identified structures, color-coded by their ages. Left panels show the face-on view, right—edge on. Top row shows age ranges of 7–7.8 dex, middle—8.3–8.8 dex, and bottom—9–9.5 dex. Solid dots are the average position of the stars in the structures; their sizes correlate to a log of the number of sources with ﹩{M}_{G}\lt 4﹩. Thick lines on the top panel show the trace of the strings along their spine. Thinner lines show the typical kinematics of the groups over next 5 Myr, in the local standard of rest, corrected for the circular velocity of 220 km s⁻¹. Transparent dots on the face-on view show the areas where the clustering is incomplete due to extinction. Black lines in the top panel show the location of the Perseus, Sagittarius, and Scutum Arms from Reid et al. (2019); the olive line shows the Radcliffe Wave (Alves et al. 2020), which is similar to the position of the Local Arm. In the bottom two panels, the outlines show the rough locations of the overdensities likely corresponding to the ancient spiral arms (left), as well as the Heliocentric Stream (right). Interactive version with full selection of the age ranges and layer control is available. Rasterized movie of the interactive plot is available at  http://mkounkel.com/mw3d/mw3dv2.mp4.

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