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== B ==
* [[Catalogo Barnard|B]] – (''catalogo'') Barnard Catalogue, ''Catalogo Barnard''
* BAA – (''organizzazione'') British Astronomical Association
* [[Bulletin of the American Astronomical Society|BAAS]] – (''pubblicazione'') Bulletin of the American Astronomical Society
* BAC – (''catalogo'') Bordeaux Astrographic Catalog, ''Catalogo Astrografico Bordeaux
* [[Beijing Astronomical Observatory|BAO]] – (''organizzazione'') Beijing Astronomical Observatory
* BASIS – (''programma osservativo'') Burst and All Sky Imaging Survey
* BATSE – (''strumentazione'') Burst and Transient Source Experiment, ''uno strumento del [[Compton Gamma-Ray Observatory]]''
* [[Bisei Asteroid Tracking Telescope for Rapid Survey|BATTeRS]] – (''telescopio'') Bisei Asteroid Tracking Telescope for Rapid Survey
* [[Black Body|BB]] – (''terminologia dell'astrofisica'') Black Body, ''[[Corpo nero]]''
* [[Broad Band X-ray Telescope|BBXRT]] – (''telescopio'') Broad Band X-Ray Telescope
* [[Blue compact dwarf|BCD]] – (''corpo celeste'') Blue Dwarf Compact, ''Nana blu compatta''
* BCD – (''software'') Basic Calibrated Data, ''dati ottenuti dopo l'elaborazione base''
* [[Variabile Beta Cephei|BCEP]] – (''Corpo celeste'') Beta CEPhei, ''una classe di [[stelle variabili pulsanti]], per le quali [[Beta Cephei]] è il prototipo''
** ''anche'' BCE
* [[Blue compact dwarf|BCG]] – (''Corpocorpo celeste'') Blue Compact Galaxy, ''altro nome delle [[nane blu compatte]]'', anche Bright Central Galaxy
* [[Brightest Cluster Galaxy|BCG]] – (''Corpo celeste'') Brightest Cluster Galaxy, ''illa più luminosa galassia di un'ammasso di galassie ''
* BCVS – (''catalogcatalogo'') Bibliographic Catalogue of Variable Stars, ''Catalogo bibliografico delle stelle variabili''
* [[Bonner Durchmusterung|BD]] – (''catalogcatalogo'') Bonner Durchmusterung
* [[Brown Dwarf|BD]] – (''celestialCorpo objectceleste'') Brown Dwarf, [[nana bruna]]
* BEN – (''catalogcatalogo'') Jack Bennett catalog, ''aun catalogcatalogo di ofoggetti deep-skydel objectsprofondo forcielo amateurper astronomersastrofili''
* BEL – (''celestialcorpo objectceleste'') broad emission line clouds in [[Active galactic nucleus, ''grandi nubi di polvere broad nei [[Nuclei di galassie attive]]''<ref>[http://arxiv.org/abs/astro-ph/0407404 The Origin of Fe II Emission in AGN], J.A. Baldwin et al. 2004</ref>
* BF – (''astrophysicsterminologia terminologydell'astrofisica'') Broadening Function
* [[Black Hole|BH]] – (''celestialcorpo objectceleste'') Black Hole, ''[[Buco nero]]''
* [[Blue Horizontal Branch|BHB]] – (''celestialcorpo objectceleste'') Blue Horizontal Branch, ''auna descriptiondescrizione fordi aun typetipo ofdi luminousstelle starluminose''
* [[Black Hole|BHC]] – (''celestialcorpo objectceleste'') Black Holecandidato ad essere un buco Candidatenero
* [[Black Hole X-Ray Transient|BHXRT]] – (''celestial object'') Black Hole X-Ray Transient, ''[[buco nero a raggi-X transiente]]''
** ''alsoanche'' BHXT
* [[Berkeley-Illinois-Maryland Association|BIMA]] – (''organizationorganizzazione'' & ''telescopetelescopio'') Berkeley-Illinois-Maryland Association, ando alsoanche B-M-I Array, '' [[microwave]]telescopio telescopea itmicroonde operated''
* [[British Interplanetary Society|BIS]] – (''organizationorganizzazione'') British Interplanetary Society
* [[BITP]] – (''organizationorganizzazione'') – [[Bogolyubov Institute for Theoretical Physics]], ''a Ukrainianun istituto di researchricerca instituteucraino''
* [[Oggetti BL Lac objectLacertae|BLLAC]] – (''celestialcorpo objectceleste'') BL LACertae, ''auna classclasse ofdi [[activegalassie galaxiesattive]] forper whichle quali [[BL Lacertae]] is theè archetypalil objectprototipo''
** ''alsoanche'' BLL
* [[BLAST (telescopetelescopio)|BLAST]] – (''telescopetelescopio'') – Balloon-borne Large Aperture Submillimeter Telescope
* [[British National Space Centre|BNSC]] – (''organizationorganizzazione'') British National Space Centre, ''the older name for [[UK Space Agency|UKSA]]''
* [[Bohyunsan Optical Astronomy Observatory|BOAO]] – (''observatory'') Bohyunsan Optical Astronomy Observatory, ''in Korea''
* BPM – (''catalog'') Bruce Proper Motion
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