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1144 "B"

mirror back
back focal length
back focus
Back-Goudsmit effect
thermal background
background brightness
background (brightness) temperature
background component
background continuous background of radiation
background continuum
background cosmic radiation
background elimination
galactic background emission
background fluctuation
background galactic noise
background intensity
background level
background noise
background observations
background of cosmic radiation
background of emission
background of extragalactic sources
general background of galactic radiation
background continuous background of radiation
background of radio radiation
galactic background radiation
background radio waves
background sky
background star
background stars
background subtraction
back illuminated CCD
backlash
back lens
back of the Moon
mirror back pad
Back-Paschen effect
back scattering
backscatter(ing)
back support
back support assembly
back support pad
three back-support points
backward lobe
backward movement
seeing very bad
Badger's equation
bad seeing
baffle
Bahner discontinuity
Baily's beads
bake
Baker meteor camera
Baker-Nunn
Baker-Nunn camera
Baker reflector-corrector
Baker-Schmidt
Baker-Schmidt camera
baking
color balance
detailed balancing
dome balcony
Baldet-Johnson bands
fire ball
ball and claw mounting
preloaded ball bearing
Ballik-Ramsay band
ball mounting
balloon
balloon astronomy
balloon-borne
balloon-borne apparatus
balloon-borne telescope
balloon flight
balloon observations
Balmer absorption continuum
Balmer alpha line
Balmer continuum
Balmer decrement
Balmer discontinuity
Balmer emission continuum
Balmer formula
Balmer jump
Balmer law
Balmer limit
Balmer lines
Balmer series
Canada balsam
balun
wave band
band edge
band(ed) spectrum
band envelope
wide band filter
band fluorescence
band head
scheme of band heads
banding
band lamp
band of obscuring matter
band of totality
band origin
receiver band pass
band pass filter
bandpass filter
wide band photometry
band profile
emission band progression
hading of bands
band scheme
limit of band series
bandshape
electronic band spectrum
band splitting
band strength
band system
band width
coherence bandwidth
band without head
Jodrell Bank
Green Bank radio telescope
central bar
barely discernible
Barlow lens
barn door mounting
barrage photocell
barred spiral
barred spiral galaxy
barrel distortion
passage through potential barrier
barrier film
barrier-layer cell
barrier-layer photocell
barrier-layer photoeffect
Bartels' diagram
baryon star
baryon star model
paper base
ground based astronomy
base level
base line
direction of baseline
very long base-line interferometry
long baseline observations
base of chromosphere
base of prominence
basic component
reflecting mercury basin
stop bath
solar battery
battery supply
Baumbach formula
revised Baumbach-formula
geomagnetic bay
Bayer name
B-component
BD
BD catalog
BD star
beaded structure
Baily's beads
pencil beam
beam efficiency
pencil beam instrument
pencil beam interferometer
beam-limiting aperture
beam-limiting device
electron beam parametric amplifier
beam pattern
atomic beam resonance spectroscopy
pencil beam scan
beam shape
beamshape
beam splitter
beam width
half-power beamwidth
beam width to half-power
upper polar(-axis) bearing
polar(-axis) bearings
Big Bear solar observatory
beat period
lava bed
Beer-Lambert law
Beer's law
before day
noise behind the signal
Beijing observatory
bell metal
radiation belt
belt Jupiter's van Allen type belts
belt of galactic emission
belt of radiation
belt of the Milky Way
van Allen belts
photometric bench
bending
bending force constant
bending vibration
Beral
Bergmann series
Besselian date
Besselian day numbers
Besselian (fictitious) year
Bessel's day numbers
best fit
β
β Canis Majoris star
β Lyrae βs
β particles
beta particles
beta rays
β Lyrae βs
β-
interactions between galaxies
line to be washed out
absorption beyond the series limit
biassed error
biconcave
bi-concave lens
biconcave lens
biconvex
bi-convex lens
biconvex lens
bifilar
bi-filar micrometer
bifurcate
bifurcated F
Big Bear solar observatory
close binaries
visual binary
binary combination head
binary digit
binary star
close binary stars
close binary system
ionic binding
binding electron
binding energy
binning
binocular
binocular eyepiece
stabilized binoculars
large binocular telescope
binocular vision
bipolar
bipolar group
bipolar magnetic region
bipolar spot
bipolar sunspot
birefringence
birefringent
birefringent crystal
birefringent filter
Birge-Hopfield bands
birth of spot
bisect
bisecting
photoelectric bisecting device
bit
black
black-and-white
black and white film
black-and-white image
black body
apparent (blackbody) disk temperature
blackbody disk temperature
black-body laws
black-body photocell
black-body radiation
black body temperature
black drop
blackening
black glass
polar cap blackout
black polyethylene
Victor Blanco telescope
mirror blank
air blanket
blanket effect
line blanketing
blanketing effect
to blanket in heat
blanking gate photocell
blaze
blaze angle
() "blazed"
blazed grating
blazing of grating
bleb
blend
blended feature
blind
blinding
solar blind photomultiplier
blind spot
blink
blink comparator
blink-comparator
blink-microscope
blocking filter
blooming
blotches
blrefringent prism
in the blue
blue dwarf
blue giant
blue moon
blue region
blue-sensitive
blue-sensitive plate
blue shift
blue star
blue stragglers
blur
blurred
blurred image
blurring
blurring effect
B-magnitude
Bode's law
black body
black body temperature
body under observation
bofometric luminosity
Bohr-Coster diagram
Bohr frequency condition
Bohr magneton
Bohr model
Bohr orbit
Bohr's building-up principle
Bohr theory
boiling-off
boil off
giant bolide
Osservatorio di Bologna
tuned bolometer
bolometric
bolometric correction
bolometric magnitude
Bolshoj telescop azimutalnyi
Boltzmann distribution
Boltzmann factor
Boltzmann's constant
Boltzmann's equation
Boltzmann statistics
bomb
meteor(it)ic bombardment
solar bombs
ionic bond
bond angle
bond energy
hydrogen bonding
bonding electron
bonding orbital
valence bond method
bond order
Bonner Durchmusterung catalog
aurora borealis
R Coronae Borealis star
R Coronae (Borealis) variables
borosilicate glass
Bose(-Einstein) statistics
Bouguer's law
magnetospheric boundary
boundary conditions
boundary temperature
boundary Value
completely bound atom
bound-bound absorption
bound-bound transition
boundedness of solution
bound electron
bound-free absorption
bound-free transition
bound level
bound state
Bouwers telescope
paraboloid bowl
error box
box section of tube
Poisson brackets
Brackett limit
Brackett series
Bragg spectrometer
brain
braking radiation
zero branch
satellite branches
branching rule
natural breadth
break-circuit wheel
breaking-off of band system
breaking-up
auroral breakup
breathing vibration
thermal bremsstrahlung
bremsstrahlung emission
bremsstrahlung radiation
Osservatorio di Brera
Brewster fall
light bridge
bridging arm of luminous matter
bright
bright bridge
bright central core
bright core
bright emission component
brighten
limb brightening
brightening of flare
brightening of plage
the brightest stars
bright fireball
Bright hydrogen flocculus
bright line
bright meteor
bright nebula
map of radio brightness
brightness coefficient
brightness contours
brightness discrimination
source brightness distribution
brightness distribution across the source
brightness distribution across the Sun
brightness distribution of radio disk
brightness increment
brightness perception
equal brightness photometer
brightness ratio
brightness response
background (brightness) temperature
surface brightness temperature
radio brightness temperature distribution
brightness threshold
brightness variation
bright point
bright radio star
system of bright rays
bright ring
bright source
bright star
Yale bright star catalog
greatest brilliance
brilliancy
Journal of British Astronomical Association
British Interplanetary Society
broad-band
broad-band continuum
broadband emission
broad band photometry
broadband radiation
broaden
turbulence broadening
broadening by damping
broadening mechanism
broad "halo"
broad side array
broadside array
broadside array of dipoles
broadside array of half-wave dipoles
broad wings
de Broglie wavelength
silver bromide emulsion
silver bromide grain
brush contact
B-star
BTA
B-type star
bubbles
light bucket
PZT building
building-up principle
equatorial bulge
bulge of the Earth
tidal bulges
bulk of galactic radiation
Information Bulletin on Variable Stars
bundle
bundle of light
law of Bunsen and Roscoe
Bunsen photometer
Central Bureau for Astronomical Telegrams
Burger-Dorgelo sum rule
unpolarized burst
storm and burst component
emission burst emission
burst from Jupiter
burst length
burstlike
burst of radiation
burst of radio emission
burst of radio waves
burst of solar noise
burst of X-rays
burst radiation
noise storm and bursts