H
- HAeBe – (celestial object) Herbig AeBe star, a type of pre–main sequence star with strong spectral emission lines
- HAe – (celestial object) Herbig Ae star
- HBe – (celestial object) Herbig Be star
- HALCA – (telescope) Highly Advanced Laboratory for Communications and Astronomy, a satellite that is part of the VLBI Space Observatory Program, a Japanese radio astronomy project
- HAO – (organization) High Altitude Observatory
- HARPS – (instrumentation) High Accuracy Radial velocity Planet Searcher, a high-precision spectrograph installed on the ESO 3.6m telescope
- HASI – (instrumentation) Huygens Atmosphere Structure Instrument, an instrument on the Huygens probe
- HB – (celestial object) Horizontal Branch, a type of evolved red giant star in which helium is burned in the core and hydrogen is burned in a shell around the core
- HBRP – (celestial object) High-magnetic field Radio Pulsar
- HBV – (catalog) Hamburg-Bergedorf Variables, a catalog of variable stars
- HBMM – (astrophysics terminology) Hydrogen Burning Minimum Mass
- HCO – (organization) Harvard College Observatory
- HCS – (celestial object) Heliospheric Current Sheet, the boundary where the polarity of the Sun's magnetic field changes direction
- HD – (catalog) Henry Draper, a catalog of stars
- HDE – (catalog) Henry Draper Extension, a catalog of stars
- HDF – (data/celestial object) Hubble Deep Field, an area of the sky with little foreground obscuration that was observed deeply with the Hubble Space Telescope; also the name for the data product itself
- HDM – (astrophysics terminology) Hot Dark Matter, any
model for structure formation in the universe that characterizes neutrinos as dark matter
- HDS – (instrumentation) High Dispersion Spectrograph, a spectrograph on the Subaru Telescope
- HE – (catalog) Hamburg/ESO Survey
- HEAO – (telescope) High Energy Astronomical Observatory, a series of X-ray and gamma ray space telescopes
- HEASARC – (organization) High Energy Astrophysics Science Archive Research Center, a NASA organization that deals with X-ray and gamma ray telescope data
- HESS – (telescope) High Energy Stereoscopic System, a telescope for detecting cosmic rays
- HETE – (telescope) High Energy Transient Explorer, a space telescope that performs multi-wavelength observations of gamma ray bursts
- HF – (astrophysics terminology) High Frequency
- HGA – (instrumentation) High Gain Antenna
- HH – (celestial object) Herbig-Haro object, objects formed when the ejecta from new stars collides with the interstellar medium
- also HHO
- HIC – (catalog) HIPPARCOS Input Catalog, a catalog of data for the first target stars selected for observation by the Hipparcos
- HICAT – (catalog) HIPASS catalog, a catalog of HI sources, see also NHICAT
- HID – (astrophysics terminology) – Hardness-Intensity Diagram, a type of color magnitude diagram used in X-ray and gamma ray astronomy
- HIP – (catalog) HIPPARCOS, the catalog of data produced by Hipparcos
- HIPASS – (Observing program) HI Parkes All-Sky Survey, survey of HI sources
- HIPPARCOS – (telescope) HIgh Precision PARallax COllecting Satellite, a space telescope specifically designed to measure distances to stars using parallax
- HISA – (astrophysical terminology) HI Self-Absorption region
- HK – (catalog) Survey for metal-poor stars based on the strength of CaII H and K absorption lines
- HLIRG – (celestial object) HyperLuminous Infrared Galaxy, a galaxy that is brighter than 1013 solar luminosities in the infrared
- HMC – (instrumentation) Halley Multicolor Camera, an instrument on the Giotto spacecraft
- HMPO – (celestial object) High-Mass Proto-stellar Object
- HMXB – (celestial object) High-Mass X-Ray Binary, an X-ray-luminous binary system consisting of a compact star and a massive star
- HPMS – (celestial object) High Proper Motion Star, a star with high proper motion
- HR – (catalog) Hoffleit Bright Star
- HR – (astrophysics terminology) Hertzsprung-Russell, a diagram that compares stars' colors to their luminosities
- HRC-I – (instrumentation) High Resolution Camera, an instrument on the Chandra X-Ray Observatory
- HRD – (instrumentation) High Rate Detector, an instrument on the Cassini spacecraft
- HRMS – (observing program) High Resolution Microwave Survey, a survey for microwave signals from extraterrestrial intelligence
- HRI – (instrumentation) High Resolution Imager, an instrument on the ROSAT telescope
- HSP – (instrumentation) High Speed Photometer, an instrument formerly on the Hubble Space Telescope
- HST – (telescope) Hubble Space Telescope
- HTRA – (astrophysics terminology) High Time Resolution Astrophysics, the observations of phenomena that vary on timescales of one second or less
- HUT – (telescope) Hopkins Ultraviolet Telescope, an ultraviolet telescope that operated from the cargo bay of the Space Shuttle
- HVC – (celestial object) High Velocity Cloud, an interstellar cloud with a velocity that is too high to be explained by galactic rotation
- HXD – (instrumentation) Hard X-ray Detector, an instrument on the Suzaku space telescope
- HVS – (celestial object) Hypervelocity Star or High Velocity Star
Read more about this topic: List Of Astronomy Acronyms