Focloir b

From South Dublin Astronomical Society

background radiation radaíocht f3 chúlra
Baily's beads péarlaí mpl Baily

Balance, the s (= Libra, the Scales) (Const.) an Mheá f4
balloon astronomy réalteolaíocht f3 bhalúin

balloon satellite satailít f2 bhalúin
Balmer jump léim f2 Balmer
Balmer series sraith f2 Balmer

band spectrum bandaspeictream m1
bar s (of galaxy) barra m4
Barlow lens lionsa m4 Barlow

Barnard's star réalta f4 Barnard
barred spiral (= barred spiral galaxy) bís f2 bharrach
barred spiral galaxy (= barred spiral) réaltra m4 bíseach barrach

Barringer crater (= Arizona meteorite crater, Coon Butte crater) cráitéar m1 Barringer
Barwell meteorite dreigít f2 Barwell
barycentre s baralár m1

baseline s bunlíne f4
basic elements bundúile fpl (gpl -dúl)

basin s imchuach m4
Bayer's nomenclature ainmníocht f3 Bayer
Bay of Rainbows (= Sinus Iridum) Bá f4 na mBoghanna Báistí

BD (Bonner Dürchmusterung) BD, Bonner Dürchmusterung
beam width léasleithead m1
Beehive, the s (= Praesepe) (Clust.) an Choirceog f2

Bellatrix s (Star) Bellatrix f4
Belt of Orion (= Hunter's Belt, Orion's Belt) Crios m3 Oiríon, an Bhanlámh f2, an Fhearsaid f2, Slat f2 an Bhodaigh, Slat f2 an Cheannaí, Slat f2 an Rí

Berenice's Hair (= Coma Berenices) (Const.) Folt m1 Bheirnicé
Bessellian year bliain f3 Bessel
Beta Lyrae stars réaltaí fpl Beta Lyrae

Betelgeuse s (Star) Betelgeuse m4
Biela's comet cóiméad m1 Biela
biconcave lens lionsa m4 déchuasach

biconvex lens lionsa m4 dédhronnach
Bielids spl (= Andromedids) (Met.Sh.) Bílidí fpl

big bang ollphléasc f2
big crunch ollbhrúisc f2
Big Dipper, the (= the Plough) an Camchéachta m4, an Céachta m4, an tSeisreach f2

binary s (= binary star, binary system, physical double star) déréalta f4
binary star (= binary, binary system, physical double star) déréalta f4
binary system (= binary, binary star, physical double star) córas m1

déréalta
binoculars spl déshúiligh mpl
Bird of Paradise (= Apus) (Const.) Éan m1 Parthais

birefringent filter scagaire m4 dé-athraonach
black-body radiation radaíocht f3 dúchoirp
black dwarf abhac m1 dubh

Black-Eye galaxy, the réaltra m4 na Súile Duibhe
black hole dúpholl m1
blink comparator (= blink microscope) comparadóir m3 caochaíola

blink microscope (= blink comparator) micreascóp m1 caochaíola
blue clouds néalta mpl gorma
blue shift gormaistriú m (gs -ithe)

blue stellar objects réada mpl gorma réaltacha
Bode's Law (= Titius-Bode law, Titius' law) dlí m4 Bode
body s (= planet, star) (in general) rinn m3

bolide s (= fireball) bóilíd f2
bolometer s bólaiméadar m1
bolometric magnitude méid f2 bhólaiméadrach

Bonner Dürchmusterung (BD) Bonner Dürchmusterung, BD
Boötes s (= the Herdsman) (Const.) Boötes m4

Boss General Catalogue Catalóg f2 Ghinearálta Boss
bremsstrahlung s bremsstrahlung m4
bridges of matter droichid mpl damhna

bright hydrogen hidrigin f2 gheal
bright nebulae réaltnéalta mpl geala
brightness s gile f4

brown dwarf abhac m1 donn
brown star réalta f4 dhonn
B stars spl B-réaltaí fpl

bulge s (of equator, galaxy etc.) bolg m1
Bull, the s (= Taurus) (Const.) an Tarbh m1

burning s (of nuclear fuel) dó m4
burst s (= outburst) rois f2 (pl -eanna)

burster s roisteoir m3
butterfly sunspot diagram léaráid f2 fhéileacánach grianspotaí