951 abbreviations
BEL(celestial object) broad emission line clouds in Active galactic nucleus[1]
BEN(catalog) Jack Bennett catalog, a catalog of deep-sky objects for amateur astronomers
BF(astrophysics terminology) Broadening Function
BH(celestial object) Black Hole
BHB(celestial object) Blue Horizontal Branch, a type of luminous star
BHC(celestial object) Black Hole Candidate
BHXRT(celestial object) Black Hole X-Ray Transient
BIMA(organization & telescope) Berkeley-Illinois-Maryland Association, and also B-M-I Array, microwave telescope it operated
BIS(organization) British Interplanetary Society
BITP(organization) Bogolyubov Institute for Theoretical Physics, a Ukrainian research institute
BLAST(telescope) Balloon-borne Large Aperture Submillimeter Telescope
BLG(catalog) BuLGe, used to designate a source detected in the direction of the bulge of the Milky Way
BLLAC(celestial object) BL LACertae, a class of active galaxies for which BL Lacertae is the archetypal object
BNSC(organization) British National Space Centre, the older name for UKSA
BOAO(observatory) Bohyunsan Optical Astronomy Observatory, in Korea
BPM(catalog) Bruce Proper Motion
BSG(celestial object) Blue Super Giant
BSS(celestial object) Blue Straggler Star
BSS(observing program) Bigelow Sky Survey
BY(celestial object) BY Draconis, a class of rotating variable stars for which BY Draconis is the archetypal object
CCambridge Catalog, 2C (Second Cambridge Catalog), 3C (Third Cambridge Catalog)
CADC(organization) Canadian Astronomy Data Centre
CAHA(organization) Centro Astronómico Hispano Alemán, a German-Spanish Astronomical Centre
CANDELS(survey) Cosmic Assembly Near-Infrared Deep Extragalactic Legacy Survey or Cosmic Assembly and Dark Energy Legacy Survey
CAPS(instrumentation) Cassini Plasma Spectrometer, an instrument on the Cassini spacecraft
CARA(organization) California Association for Research in Astronomy
CARA(organization) Center for Astrophysical Research in Antarctica
CASCA(organization) Canadian Astronomical Society / Société canadienne d'astronomie (the name is officially bilingual)[2]
CASS(organization) Center for Advanced Space Studies
CBAT(organization) Central Bureau for Astronomical Telegrams
CBR(celestial object) Cosmic Background Radiation
CC(celestial object) Candidate Companion, a newly detected observed object that initially appears to orbit another celestial object
CCD(instrumentation) Charge Coupled Device
CCD(astrophysics terminology) Color-Color Diagram, a plot that compares the differences between magnitudes in different wave bands
CCDM(catalog) Catalog of Components of Double and Multiple Stars
CCO(catalog) Catalogue of Cometary Orbits
CCO(celestial object) Central Compact Object, a compact star in the center of a planetary nebulae
CCS(celestial object) Cool Carbon Star
CD(catalog) Cordoba Durchmusterung
CDIMP(catalog) Catalogue of Discoveries and Identifications of Minor Planets
CDM(astrophysics terminology) Cold Dark Matter, any model for structure formation in the universe that characterize "cold" particles such as WIMPs as dark matter
CDS(organization) Centre de Données astronomiques de Strasbourg
CELT(telescope) California Extremely Large Telescope, an older name for the Thirty Meter Telescope
CEMP(celestial object) Carbon-Enhanced Metal-Poor, a type of carbon star
CEMP-no(celestial object) Carbon-Enhanced Metal-Poor star with no enhancement of elements produced by the r-process or s-process nucleosynthesis
CEMP-r(celestial object) Carbon-Enhanced Metal-Poor star with an enhancement of elements produced by r-process nucleosynthesis
CEMP-r/s(celestial object) Carbon-Enhanced Metal-Poor star with an enhancement of elements produced by both r-process and s-process nucleosynthesis
CEMP-s(celestial object) Carbon-Enhanced Metal-Poor star with an enhancement of elements produced by s-process nucleosynthesis
CEP(celestial object) CEPheid, a type of pulsating variable star
CEPS(organization) Center for Earth and Planetary Studies