B
- B – (catalog) Barnard catalog
- BAA – (organization) British Astronomical Association
- BAAS – (publication) Bulletin of the American Astronomical Society
- BAC – (catalog) Bordeaux Astrographic Catalog
- BAO – (organization) Beijing Astronomical Observatory
- BASIS – (observing program) Burst and All Sky Imaging Survey
- BAT – (instrumentation) Burst Alert Telescope, an instrument on SWIFT
- BATC – (observing program) Beijing-Arizona-Taiwan-Connecticut, the name of a multi-wavelength sky survey
- BATSE – (instrument) Burst and Transient Source Experiment, an instrument on the Compton Gamma-Ray Observatory
- BATTeRS – (telescope) Bisei Asteroid Tracking Telescope for Rapid Survey
- BB – (astrophysics terminology) Black Body
- BBXRT – (telescope) Broad Band X-Ray Telescope
- BCD – (celestial object) Blue Compact Dwarf
- BCD – (software) Basic Calibrated Data, data produced after basic processing
- BCEP – (celestial object) Beta CEPhei, a class of pulsating variable stars for which Beta Cephei is the archetypal object
- also BCE
- BCG – (celestial object) Blue Compact Galaxy, another name for a blue compact dwarf, also Bright Central Galaxy
- BCG – (celestial object) Brightest Cluster Galaxy, the brightest galaxy in a cluster of galaxies
- BCVS – (catalog) Bibliographic Catalogue of Variable Stars
- BD – (catalog) Bonner Durchmusterung
- BD – (celestial object) Brown Dwarf
- BEN – (catalog) Jack Bennett catalog, a catalog of deep-sky objects for amateur astronomers
- BEL – (celestial object) broad emission line clouds in Active galactic nucleus
- 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
- also BHXT
- 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
- BLLAC – (celestial object) BL LACertae, a class of active galaxies for which BL Lacertae is the archetypal object
- also BLL
- BLAST – (telescope) – Balloon-borne Large Aperture Submillimeter Telescope
- 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
- also BS
- 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
Read more about this topic: List Of Astronomy Acronyms