HAZEL: HAnle and ZEeman Light

HB Morphology and Age Indicators for Metal-Poor Stellar Systems with Age in the Range of 1 to 20 Gyr

HB morphology and the Second Parameter Effect: Faint Stars in a big game

Hbeta Profiles in Quasars: Evidence for an Intermediate-line Region

HBO and Periastron Precession around the X-ray Neutron Star Magnetosphere

HBV 475: Evolution Stage of a Planetary Nebula?

HC3N and the ages of dense cores

HC9N from the Envelopes of IRC+10216 and CRL:2688

HCG 16 Revisited: Clues About Galaxy Evolution in Groups

HCG 16: A High Concentration of Active Galaxies in the Nearby Universe

HCG 31: a multiple merger in progress

HCN absorption towards Cassiopeia A

HCN and CO in the nucleus of NGC 1068

HCN and HCO+ emission in the disk of M31

HCN and HCO+ Observations of the Galactic Circumnuclear Disk

HCN and HNC mapping of the protostellar core Cha-MMS1

HCN and HNC observations towards dark clouds

HCN emission and nitrogen-bearing molecules in oxygen-rich circumstellar envelopes

HCN emission from the HII regions G75.78+0.34 and G75.77+0.34

HCN emission toward CRL 2688 - Evidence for angular momentum transport in a circumstellar envelope