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== B ==
* [[Catalogo Barnard|B]] – (''catalogcatalogo'') BarnardCatalogo catalogBarnard
* BAA – (''organizationorganizzazione'') British Astronomical Association
* [[Bulletin of the American Astronomical Society|BAAS]] – (''publicationpubblicazione'') Bulletin of the American Astronomical Society
* BAC – (''catalogcatalogo'') Bordeaux Astrographic Catalog
* [[Beijing Astronomical Observatory|BAO]] – (''organizationorganizzazione'') Beijing Astronomical Observatory
* BASIS – (''observingprogramma programosservativo'') Burst and All Sky Imaging Survey
* BAT – (''instrumentationstrumentazione'') Burst Alert Telescope, ''anuno instrumentstrumento ondello [[Swift Gamma-Ray Burst Mission|SWIFT]]''
* BATC – (''observingprogramma programosservativo'') Beijing-Arizona-Taiwan-Connecticut, ''theil namenome ofdi auna multi-wavelengthlunghezza d'onda sky survey''
* BATSE – (''instrumentstrumentazione'') Burst and Transient Source Experiment, ''anuno instrumentstrumento on thedel [[Compton Gamma-Ray Observatory]]''
* [[Bisei Asteroid Tracking Telescope for Rapid Survey|BATTeRS]] – (''telescopetelescopio'') Bisei Asteroid Tracking Telescope for Rapid Survey
* [[Black Body|BB]] – (''astrophysicsterminologia terminologydell'astrofisica'') Black[[Corpo Bodynero]]
* [[Broad Band X-ray Telescope|BBXRT]] – (''telescopetelescopio'') Broad Band X-Ray Telescope
* [[Blue compact dwarf|BCD]] – (''celestialcorpo objectceleste'') BlueNana Compactblu Dwarfcompatta
* BCD – (''software'') Basic Calibrated Data, ''datadati producedottenuti afterdopo basicl'elaborazione processingbase''
* [[Variabile Beta Cephei variable|BCEP]] – (''celestialCorpo objectceleste'') Beta CEPhei, ''auna classclasse of pulsatingdi [[variablestelle variabili starpulsanti]]s, per forle whichquali [[Beta Cephei]] is theè archetypalil objectprototipo''
** ''alsoanche'' BCE
* [[Blue compact dwarf|BCG]] – (''celestialCorpo objectceleste'') Blue Compact Galaxy, ''anotheraltro namenome for adelle [[bluenane compactblu dwarfcompatte]]'', alsoanche Bright Central Galaxy
* [[Brightest Cluster Galaxy|BCG]] – (''celestialCorpo objectceleste'') Brightest Cluster Galaxy, ''theil brightest galaxy in a cluster of galaxies''
* BCVS – (''catalog'') Bibliographic Catalogue of Variable Stars
* [[Bonner Durchmusterung|BD]] – (''catalog'') Bonner Durchmusterung
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