The Origin of the Silicate Emission Features in the Seyfert 2 Galaxy, NGC 2110
The origin of the [C II] emission in the S140 PDRs - new insights from HIFI
The origin of very wide binary systems
The Outer Disk of the Milky Way Seen in 21-cm Absorption
The outer halos of elliptical galaxies
The Outer Shock of the Oxygen-Rich Supernova Remnant G292.0+1.8: Evidence for the Interaction with the Stellar Winds from its Massive Progenitor
The Oxygen Abundance in the Solar Neighborhood
The oxygen vs. sodium (anti)correlation(s) in omega Cen
The PAH hypothesis after 25 years
The Parker instability in axisymmetric filaments: Final equilibria with longitudinal magnetic field
The past, present and future of Galactic planetary nebula surveys
The Peculiar Chemical Inventory of NGC 2419 -- An Extreme Outer Halo "Globular Cluster"
The photodissociation and chemistry of CO isotopologues: applications to interstellar clouds and circumstellar disks
The physical and dynamical structure of Serpens: Two very different sub-(proto)clusters
The physical conditions in Gomez's Hamburger (IRAS 18059-3211), a pre-MS rotating disk
The physical properties and evolution of Lyalpha emitting galaxies
The Physical Properties of High-Mass Star-Forming Clumps: A Systematic Comparison of Molecular Tracers
The physical properties of the dust in the RCW 120 HII region as seen by Herschel
The physics and modes of star cluster formation: observations
The physics and modes of star cluster formation: simulations