H53-alpha emission from M82
H66-alpha radio recombination line observations of southern H II regions
H76α Emission from the Sgr A "15 km/s Cloud"
H92-α Recombination Line Observations of M16.
H@ and H# Photoelectric Photometry for 80 Bright Stars
HA Emission Between the Magellanic Clouds
Ha Emission extraction using Narrowband Photometric Filters
Ha Fabry-Perot Rotation Curves of a Large Sample of Spiral Galaxies in Clusters
Habitability and Stability of Orbits for Earth-Like Planets in the Extrasolar System 47 UMa
Habitability in the Upsilon Andromedae System
Habitability of Brown Dwarf Planets
Habitability of Planets
Habitable Extrasolar Planetary Systems; The Case of ρ Cancri
Habitable Moons Around Extrasolar Giant Planets
Habitable Planet Formation; A Review of Current Status
Habitable Planets in Binary Star Systems
Habitable Planets in Compact Close-in Planetary Systems
Habitable Planets In The Planetary System Of HD 69830
Habitable Planets: Observational Arguments
Habitable Planets: Targets and their Environments