Hα and Gaia-RVS domain spectroscopy of Be stars and interacting binaries with Ondřejov 2m telescope

Hα and [NII] survey in local 11 Mpc (Kennicutt+, 2008)

Hα Auroral Activity on Jupiter

Hα Chromospheric Mottles and their UV/EUV Counterparts Seen by SOHO/Sumer

Hα Coronagraph Observations of a Flare Spray, March 1, 1969

Hα Detection of Colliding Winds in O-Type Binaries

Hα Dimming Associated With the Eruption of a Coronal Sigmoid in the Quiet Sun

Hα Doppler Brightening and Lyman-α Doppler Dimming in Moving Hα Prominences

Hα emission in the presence of dust in an Ar-C2H2 radio-frequency discharge

Hα Emission Line Profiles of Solar Flares with Turbulent Velocity Fields

Hα emission line sources from IPHAS (Witham+, 2008)

Hα Emission Line Wings in θ CrB

Hα Emission of Atmospheric Atomic Hydrogen from Observations in Zvenigorod, Abastumani, and Alma-Ata

Hα emission stars in the Orion Nebula (Parsamian+, 1982)

Hα emission stars near NGC 7000 (Welin+, 1973)

Hα emission-line objects in SMC clusters (Martayan+, 2010)

Hα emitting galaxies in COSMOS-2 field (Shioya+, 2008)

Hα equivalent widths of 36 Lyn (HD 79158) (Wade+, 2006)

Hα excitation in the hydrogen near the Earth

Hα Filtergrams of the Sun on March 7, 1970