Large-scale view of the Orion-Eridanus superbubble (which reaches beyond Barnard’s Loop) and star-forming clouds along its wall. The color background shows Planck 857 GHz (350 μm) emission (Public Data Release 2, PR2), and the overplotted gray features represent Hα emission (Finkbeiner 2003). The region analyzed in this paper is outlined in white. (PR2 is described in the Planck 2015 Release Explanatory Supplement which is available at https://wiki.cosmos.esa.int/planckpla2015/).