Diffuse X‐ray Structures in Massive Star‐forming Regions Available to Purchase

The Chandra X‐ray Observatory is providing remarkable new views of massive star‐forming regions. Very young complexes are suffused by parsec‐scale diffuse X‐ray structures outlined by heated dust seen in mid‐infrared images; these are the long‐sought signatures of multi‐million‐degree plasmas created by fast O‐star winds. In older regions we see much brighter diffuse emission regions; these are likely the X‐ray remains of massive stars that stayed close to their birthplaces, exploding as cavity supernovae within the superbubbles that these clusters created.