Atomic HI
Molecular Hydrogen
Infrared (dust)
Milky Way plane:
NASA GSFC
Johannes Buchner
PUC
Collaborators: @PUC: Steve Schulze, Franz Bauer
@MPE: A. Georgakakis, K. Nandra, M. Brightman, ML. Menzel, Z. Liu, L-T. Hsu, M. Salvato, C. Rangel, J. Aird, A. Merloni