H II regions, infrared dark molecular clouds and the local geometry of the Milky Way's nuclear star-forming ring

H$α$ kinematics of KPG 390

H-alpha and Free-Free Emission from the WIM

H-alpha Imaging of X-ray Sources in Selected Globular Clusters with the SOAR Telescope

H2 infrared line emission from the ionized region of planetary nebulae

H2 Temperatures in the Crab Nebula

H2CO and CH3OH maps of the Orion Bar photodissociation region

H2CO in the Horsehead PDR: Photo-desorption of dust grain ice mantles

H2D+ in the high mass star-forming Region Cygnus-X

H2O maser motions and the distance of the star forming region G192.16-3.84

H3+ and UKIRT: a saga of discovery

H91$α$ Radio Recombination Line and 3.5 cm Continuum Observations of the Planetary Nebula NGC 3242

Halo globular clusters observed with AAOmega: dark matter content, metallicity and tidal heating

Halo streams in the 7th SDSS data release

Halo Velocity Groups in the Pisces Overdensity

HALOGAS: HI Observations and Modeling of the Nearby Edge-on Spiral Galaxy NGC 4244

Hanny's Voorwerp: Evidence of AGN activity and a nuclear starburst in the central regions of IC 2497

Hard X-ray properties of magnetic cataclysmic variables

HAT Discovery of 76 Bright Periodic Variables Toward the Galactic Bulge

Have proto-planetary discs formed planets?