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F
|
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H
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I
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J
|
K
|
L
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M
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N
|
O
|
P
|
Q
|
R
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S
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T
|
U
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V
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W
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X
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2155 "A"
against
a
background
Abastumani
astrophysical observatory
Seidel
aberration
aberration(al)
ellipse
aberration
angle
aberration
constant
aberration-free
objective
aberration
image
aberration
in declination
aberration
in ecliptic longitude
aberration
in latitude
aberration
in right ascension
aberration
of light
chromatic
aberration
of position
optical
aberrations
ablation
abnormal
abnormal
galaxy
abnormal
series
abrasive
absolute
black body
absolute
brightness
absolute
coordinates
absolute
declination
absolute
degree
absolute
determinations
absolute
line strength
absolute
luminosity
spectroscopic
absolute
magnitude
absolute
magnitude effect
absolute
method
absolute
parallax
absolute
photographic magnitude
absolute
position
absolute
proper motion
absolute
radio magnitude
absolute
sensitivity
absolute
stellar luminosity
absolute
temperature
absolute
unit
absolute
zero
absorb
absorbability
absorbed
energy
absorbed
light
selective
absorber
absorbing
capacity
absorbing
cloud
absorbing
layer
absorbing
medium
absorbing
power
absorbing
region
absorbing
wedge
21-cm line
absorption
absorption,
atmospheric
absorption
band
absorption
band progression
absorption
beyond the series limit
stellar
absorption
coefficient
Balmer
absorption
continuum
absorption
edge
absorption
effects
absorption
feature
absorption
flocculus
absorption
limiting frequency
absorption
line
overlap of
absorption
lines
absorption
loss
absorption
mechanism
dark
(absorption)
nebula
absorption
power
absorption
process
absorption
profile
absorption
spectrum
absorption
tube method
absorption
water cell
absorptive
power
absorptive
process
absorptivity
oxygen
abundance
abundance
broadening
abundance
classification
abundance
of elements
abundance
of isotopes
equinox of
a
catalogue
terrestrial
acceleration
acceleration
due to gravity
acceleration
factor
auroral
acceleration
mechanism
acceleration
of expansion
acceleration
of gravity
acceleration
radiation
acceleration
vector
accelerometer
frequency
acceptance
band
acceptor
accessories
accessory
drive
accidental
degeneracy
accidental
error
accidental
perturbation
accidental
predissociation
accidental
symmetric top
accidental
variations
accommodation
gaseous
accretion
accumulated
error
tracking
accuracy
achondrite
modified
achromat
eyepiece
achromatic
achromatic
doublet
achromatic
lens
achromatic
Ramsden eyepiece
achromatic
system
achromatism
achromatize
acid
fixing bath
to move in
a
circular orbit
against
a
continuous emission background
acoustical
wave
arm of
a
cross
transit
across
the disk of the Sun
brightness distribution
across
the source
brightness distribution
across
the Sun
particular
act
actinic
actinic
rays
actinides
actinism
actinogram
actinograph
actinometer
actinometric
actinometry
actinoscope
quantum of
action
activation
activation
energy
active
atmospheric compensation
active
center
magnetically
active
days
active
optics
active
parsecs
active
photospherlc region
common
active
prominence
solar
active
region
active
stream
active
Sun
active
support
Raman
active
vibration
active
volcano
principal source of decameter
activity
solar
activity
index
actual
antenna
actual
aperture
actual
area
actual
position
actual
pressure gradient
visual
acuity
remnants of the supernova of
A.
D.
Adams-Russell
phenomenon
dark
adaptation
adapter
adaptive
optics
adder
adding
machine
additional
mirror
adiabate
adiabatic
adiabatic
equilibrium
adiabatic
gas law
adiabatic
gradient
adiabatic
invariant
adiabatic
lapse rate
adiabatic
law
adiabatic
process
adiabatic
temperature gradient
adjacent
galaxies
slit-width
adjusting
screw
threshold
adjustment
National Aeronautic and Space
Administration
variable-speed R.
A.
drive
star of
advancing
spectral type
telephoto
advantage
aeolosphere
aeolosphere
model
aeolospheric
aeolospheric
model
aerial
aerial
area
aerial
array
aerial
beam
aerial
beamwidth
aerial
camera
aerial
diagram
aerial
directivity
aerial
efficiency
aerial
feed
aerial
feeder
aerial
fog
aerial
gain
aerial
line
aerial
relation
aerial
sensitivity
aerial
separation
aerial
smoothing
aerial
spacing
aerial
survey
pencil-beam
(aerial)
system
interferometer
aerial
system
aerial
telescope
aerial
temperature
aerial
temperature distribution
aerial
terminals
aerodynamic
drag
aerolite
National
Aeronautic
and Space Administration
aerosiderite
aerosiderolite
aerosol
electron
affinity
afocal
imaging
afocal
optics
South
African
astronomical observatory
South
African
large telescope
after-effect
afterglow
after
image
against
a background
against
a continuous emission background
supposed
age
age-dating
age-figure
tests
European Space
Agency
age
of the universe
aggregate
aggregation
effect of
aging
geomagnetic
agitation
rough
agreement
free-burning dc arc in
air
air
band spectrum
air
blanket
observation
airborne
observation
airborne
photography
aircraft
trail
air
current
air-driven
air
glow
twilight
airglow
airglow
excitation
airglow
spectrum
air-leg
airless
terrestrial
air
mass
zero
air-mass
solar spectral irradiation curve
air-operated
air
path
air-powered
air
Schmidt
air
showers
air-tyred
air
wavelength
Airy
disk
Airy
transit circle
radio-frequency
albedo
albedometer
Alfven
waves
Algol
Algol
binary
Algol
star
Algonquin
telescope
aliasing
alidad(e)
alidade
alignment
inverted
(alkali)
doublet
alkali-earth
metals
alkali
elements
alkali-line
spectrum
alkali
metals
alkali(ne)-earth
elements
alkaline
earth-like spectrum
van
Allen
belts
belt Jupiter's van
Allen
type belts
radio astronomy
allocation
allowance
allowance
for...
allowed
orbit
allowed
spectrum line
allowed
transition
to
allow
for...
aluminium
alloy
all-purpose
observatory
all-sky
camera
all-sky
coverage
Nautical
almanac
nautical
almanac(k)
almucantar
almukantar
along
the line of sight
geocentric
(al)
orbit
α2
Canum Venaticorum variables
()
α2
Lyman
alpha
detector
Lyman
alpha
line
α-particles
alpha
particles
α-
altazimuth
altazimuth
coordinates
altazimuth
mounting
altazimuth
reflector
altazimuth
telescope
alt-az
telescope mounting
multiplicity
alteration
intensity
alternation
alternation
law of multiplicities
circle of
altitude
altitude
axis
altitude-azimuth
mounting
high
altitude
nuclear explosion
altitude
of North Pole
Calar
Alto
observatory
aluminium
alloy
aluminium
film
aluminium
reflectivity
aluminizing
aluminizing
chamber
aluminizing
tank
during
a
lunation
AMANDA
neutrino detector
amateur
astronomer
amateur
astronomy
amateur
observations
amateur
telescope
ambient
light illumination
ambient
temperature
ambiguity
American
Association of Variable Star Observers
American
Astronomical Society
ametropic
eye
amidol
developer
ammonia
ammonium
dihydrogen phosphat
amount
of polarization
amplification
amplification
coefficient
amplification
factor
maser
amplifier
amplifier-rectifier
fringe
amplitude
visibility
amplitude
function
amplitude
grating
spectrograph interferometric with selective
amplitude
modulation
amplitude
of variation
analemma
analogue
computer
analyser
frequency
analysis
image reduction and
analysis
facility
fine
analysis
method
Zeeman
analyzer
analyzing
spectroscope
anastigmatic
lens
anastigmatic
optics
image reduction
and
analysis facility
Particle Physics
and
Astronomy Research Council
storm
and
burst component
noise storm
and
bursts
ball
and
claw mounting
Catalog of Galaxies
and
clusters of Galaxies
H
and
D curve
H
and
K lines
rack
and
pinion focuser
declination
and
right ascension
law of Bunsen
and
Roscoe
Mount Stromlo
and
Siding springs observatory
National Aeronautic
and
Space Administration
ventilation
and
temperature-control system
black
and
white film
worm
and
worm-wheel drive
resolution of
a
nebula
guiding correction in hour
angle
position
angle
effect
ultra-wide
angle
eyepiece
angle
measurements
effective solid
angle
of antenna
angle
of diffraction
angle
of dip
angle
of dispersion
apparent
angle
of elevation
angle
of emergency
angle
of incidence
angle
of minimum deviation
angle
of refraction
small
angle
relationships
range of phase
angles
Anglo-Australian
observatory
Anglo-Australian
telescope
angstrom
Angstrom
band
Angstrom
unit
angular
accuracy
angular
aperture
Sun's mean
angular
diameter
angular
diameter measurement
angular
dimensions
angular
discrimination
angular
dispersion
angular
displacement
angular
distance
angular
distribution
angular
distribution of sources
angular
estimate
angular
extent
angular
field of view
angular
frequency
angular
information
angular
light-distribution
angular
magnification
angular
measurement
precession of
angular
momentum
mean
angular
motion
angular
position
angular
power spectrum
angular
precision
angular
radius
angular
rate of rotation
angular
resolution
Center for High
Angular
Resolution Astronomy
angular
resolving power
angular
scale
angular
scattering law
angular
scintillation
angular
separation
angular
separation of fringes
equivalent
angular
size
angular
size work
angular
structure
angular
variation
angular
velocity
anharmonicity
anharmonicity
constant
anharmonic
vibrator
anisotropic
anisotropic
particles
anisotropic
plasma
anisotropy
annealing
annihilation
annual
annual
aberration
annual
anomaly
annual
motion
annual
parallax
general
annual
precession
total
annual
proper motion
annual
variation
annular
annular
aperture
annular
eclipse
annularity
annular
micrometer
annular
phase
per
annum
to train on to
an
object
focusing
anode
refraction
anomalies
anomalistic
anomalistic
month
anomalistic
period
anomalistic
year
anomalous
absorption
anomalous
coupling
anomalous
dispersion
anomalous
g-Value
anomalous
intensity
anomalous
Zeeman effect
Wood's
anomaly
antalgol
star
antapex
antapices
Antarctic
Circle
Yagi
antenna
antenna
area
antenna
array
antenna
base line
antenna
beam
antenna
beamwidth
antenna
diagram
antenna
directivity
antennae
antenna
efficiency
feed
antenna
feed
antenna
feeder
antenna
gain
antenna
line
antenna
pattern
antenna
relation
antenna
resolving power
array of Yagi
antennas
antenna
sensitivity
antenna
separation
antenna
simple antenna
antenna
smoothing
antenna
spacing
antenna
specification
antenna
spillover
interferometer
antenna
system
antenna
tapering
antenna
temperature
antenna
temperature distribution
antenna
terminals
antenna
transmission line
anterior
chamber
anti-blooming
antibonding
electron
antibonding
orbital
galactic
anticenter
anticenter
direction
anticenter
observations
anticenter
region
anticentral
anticentral
peak
anticlockwise
anticrepuscular
arc
antiglow
antihalo
antimatter
anti-reflection
coating
antireflection
film
anti-Stokes
lines
antisymmetric
antisymmetric
eigenfunction
antisymmetric
level
Antoniadi
scale
Antu
anysotropy
Apache
point observatory
apastron
aperiodic
motion
un-filled
aperture
aperture
angle
unfilled
aperture
antenna
aperture
diameter
aperture
diaphragm
aperture
effect
aperture
efficiency
full
aperture
filter
synthetic
aperture
radar
aperture
ratio
technique of unfilled
apertures
aperture
stop
aperture
synthesis
aperture
synthesis antenna
Cambridge optical
aperture
synthesis array
aperture
synthesis interferometer
aperture
synthesis method
aperture
synthesis observations
aperture-synthesis
principle
aperture-synthesis
system
apex
aphelia
aphelic
distance
at
aphelion
aphelion
distance
aphelion
speed
aphelion
velocity
apices
aplanat
aplanatic
aplanatic
condition
aplanatic
optics
aplanatic
sphere
Schmidt
aplanatic
sphere camera
aplanatic
telescope
apocenter
apochromat
apochromatic
lens
apodization
at
apogee
apogee
distance
registering
apparatus
apparatus
function
apparent
apparent
absorption
apparent
absorption coefficient
apparent
altitude
apparent
angle of elevation
apparent
(blackbody) disk temperature
apparent
bolometric magnitude
apparent
brightness
apparent
celestial sphere
apparent
color
apparent
coordinates
apparent
diameter
apparent
disk
apparent
elevation
apparent
equinox
apparent
expansion
apparent
field of view
limiting
apparent
magnitude
apparent
motion
apparent
noon
apparent
orbit
apparent
path of the Moon
apparent
photographic magnitude
apparent
photored magnitude
apparent
photovisual magnitude
apparent
place
reduction from
apparent
place to mean place
apparent
position
apparent
radiant
apparent
radiometric magnitude
apparent
rotation by refraction of field
apparent
sidereal time
apparent
size
apparent
(solar) time
apparent
sunspot area
apparent
temperature
apparent
temperature of the Sun
apparent
visual magnitude
apparition
telescopic
appearance
appearance
potential
Appleton
layer
application
of correction
applied
photography
to
apply
correction for...
close
approach
approach
velocity
approximate
position
Rayleigh-Jeans
approximation
appulse
apse
apsidal
motion
line of
apsides
apsis
aqueous
humor
arbitrarily
polarized beam
matter of
arbitrariness
minute of
arc
eruptive
arch
shutter
arches
Hubble data
archive
free-burning dc
arc
in air
free-burning dc
arc
in vacuum
arc
minute
arc
second
arc
spectrum
Arctic
Circle
effective
area
area
corrected for foreshortening
areal
integral
areal
velocity
law of
areas
Aresibo
radio telescope
Argelander
step method
Instituto
Argentino
de Radioastronomia
argon
argument
of perihelion
first point of
Aries
Å
arm
armillary
sphere
arm
of a cross
bridging
arm
of luminous matter
arm
of reflectors
new Moon in the old Moon's
arms
region
around
the pole
two-aerial
arrangement
Very large
array
coded
array
mask
broadside
array
of dipoles
broadside
array
of half-wave dipoles
array
of Yagi antennas
array
of Yagis
second
art
collision
artificial
artificial
comet
artificial
Earth satellite
artificial
Earth satellite program(me)
artificial
gravitation
artificial
gravity
artificial
guide star
artificial
meteor
artificial
Moon satellite
artificial
planet
artificial
radiation belt
unmanned
artificial
satellite
artificial
satellite orbit
artificial
star
universe
as
a whole
ascending
longitude of the
ascending
node
ascending
node-perihelion angle
ascending
prominence
declination and right
ascension
true right
ascension
at date
right
ascension
circle
relative right
ascensions
volcanic
ash
ashen
light
Asiago
observatory
aslrometric
observations
aspect
aspheric
aspheric(al)
depth of
asphericity
aspheric
plate
assemble
slow motion drive
assembly
Journal of British Astronomical
Association
Association
of Universities for Research in Astronomy
American
Association
of Variable Star Observers
assumed
apex
assumed
radius
asterism
asteroid
asteroidal
asteroidal
meteors
asteroid
belt
asteroid
orbit
family of
asteroids
asteroid
zone
astigmatic
astigmatism
astral
astrobiology
astrobotany
astrocamera
astro-compass
astrodynamic
astrodynamics
Instituto de
Astrofisica
de Canarias
astrognosy
meniscus
astrograph
astrographic
camera
astrographic
telescope
Danjon
astrolabe
astrolabe
observations
astrologer
astrology
astrometric
astrometric
eyepiece
astrometric
observatory
astrometric
reflector
astrometric
telescope
photographic
astrometry
Astrometry
division
astronaut
astronautical
astronautical
objective
astronautics
astronavigation
stellar
astronomer
Astronomer
Royal
astronomic(al)
astronomical
aberration
Journal of British
Astronomical
Association
astronomical
body
astronomical
calculations
astronomical
calendar
astronomical
camera
astronomical
climate
astronomical
clock
system of
astronomical
constants
astronomical
coordinates
astronomical
coordinate system
astronomical
data
Astronomical
Data Center
astronomical
day
astronomical
dictionary
astronomical
distances
astronomical
experiments
radio
astronomical
explorations
astronomical
guiding
astronomical
history
astronomical
information
astronomical
institute
astronomical
instruments
astronomical
knowledge
astronomical
latitude
astronomical
literature
astronomically
radio
astronomical
method
astronomical
methods
astronomical
navigation
astronomical
object
astronomical
observations
South African
astronomical
observatory
astronomical
optics
astronomical
parameters
astronomical
phenomena
astronomical
photoelectric photometry
astronomical
photograph
astronomical
photography
astronomical
photometer
astronomical
photometry
astronomical
problems
astronomical
quantities
astronomical
radar
astronomical
radar work
astronomical
radio frequencies
astronomical
radio waves
astronomical
reference system
astronomical
refraction
astronomical
refractor
astronomical
research
astronomical
research project
astronomical
satellite
astronomical
scintillation
astronomical
seeing
astronomical
sign
astronomical
societies
Royal
Astronomical
Society
Astronomical
Society of Pacific
Publication of the
Astronomical
Society of the Pacific
astronomical
source
astronomical
spectrograph
astronomical
spectrophotometry
astronomical
spectroscopy
radio
astronomical
station
astronomical
studies
astronomical
symbols
astronomical
tables
astronomical
target
astronomical
techniques
Central Bureau for
Astronomical
Telegrams
astronomical
telescope
astronomical
term
astronomical
terminology
Greenwich mean
astronomical
time
astronomical
time scale
astronomical
tool
astronomical
triangle
astronomical
tube
astronomical
twilight
International
Astronomical
Union
astronomical
unit
astronomical
universe
radio
(astronomical)
work
astronomical
work
Observatorio
Astronomico
Nacional
Institut de radio
astronomie
millimetrique
Centre de Donnees
astronomiques
de Strasbourg
Center for High Angular Resolution
Astronomy
radio
astronomy
allocation
Nuffield Radio
Astronomy
Laboratory
radio
astronomy
method
National Optical
Astronomy
Observatories
Mullard Radio
Astronomy
Observatory
radio
astronomy
receiver
Particle Physics and
Astronomy
Research Council
radio
astronomy
technique
astrophotography
astrophotometer
astrophotometry
astrophysical
astrophysical
institute
astrophysical
instruments
astrophysical
observations
Smithsonian
astrophysical
observatory
astrophysical
problems
astrophysical
research
Southern
astrophysical
research telescope
National Center for Radio
Astrophysics
Astrophysics
division
astrospectroscopy
astrovelocimeter
Asundi
band
stellar remnant of
a
supernova
asymmetrical(-class)
telescope
asymmetrical
distortion
asymmetrical
mounting
asymmetric(al)
top
asymmetric-top
molecule
east-west
asymmetry
Atacama
large millimeter array
Cornell
Atacama
telescope
at
aphelion
at
apogee
true place
at
date
at
full moon
at
ground level
half width
at
half maximum
at
high latitudes
at
infrared
star
atlas
at
low latitudes
sidereal time
at
mean midnight
noise radiation from
atmosphere
absorption,
atmospheric
atmospheric
absorption
atmospheric
air
atmospheric(al)
conditions
atmospheric
attenuation
atmospheric
bands
atmospheric
circulation belts
active
atmospheric
compensation
atmospheric
constituents
atmospheric
corrections
atmospheric
density
atmospheric
depth
atmospheric
diffusion coefficient
atmospheric
dispersion
atmospheric
dynamo
atmospheric
effect
atmospheric
emission
atmospheric
extinction
atmospheric
Fs
atmospheric
heating
atmospheric
lines
atmospheric
O 2 band
atmospheric
optics
atmospheric
parameters
atmospheric
perturbation
atmospheric
phenomenon
atmospheric
pressure
atmospheric
properties
atmospheric
radiation
atmospheric
refraction
atmospheric
refraction effects
sudden enhancement of
atmospherics
atmospheric
scattering
atmospheric
scintillation
atmospheric
seeing
atmospheric
structure
atmospheric
temperature
atmospheric
turbulence
atmospheric
window
Mars
at
near approach
mass of hydrogen
atom
atomic
atomic
absorption coefficient
atomical
source
gaseous
atomic-beam
light source
atomic-beam
method
atomic
beam resonance spectroscopy
atomic
clock
atomic
constants
atom(ic)
energy
atomic
energy levels
atomic
excitation
atomic
fluorescence
atomic
heat of formation
atomic
hydrogen
atomic
hydrogen emission
atomic
lifetime
atomic
line
atomic
mass
atomic
molecule
atomic
multiplet
atomic
nucleus
atomic
number
atomic
orbit
atomic
orbital
atomic
partition function
atomic
radius
atomic
spectrum
atomic
state
odd
atomic
term
international
atomic
time
atomic
time scale
mean
atomic
weight
atomic-weight
unit
atom
model
atom
transition
at
perihelion
at
sea level
tracking
at
sidereal rate
attachment
total zenith
attenuation
filter
attenuation
band
synodic period of rotation
at
the equator
at
the prime focus
at
the subsolar point
attract
force of
attraction
attraction
center
attractive
force
attractive
interaction
attractive
potential curve
A-type
star
solar
aureole
aurora
aurora
australis
aurora
borealis
aurorae
auroral
auroral
absorption
auroral
acceleration mechanism
auroral
arc
auroral
band
auroral
blackout
auroral
breakup
auroral
corona
auroral
crown
auroral
display
auroral
echo
auroral
emission
auroral
latitude
auroral
line
auroral
particles
auroral
primaries
auroral
primary particles
auroral
rays
auroral
spectrum
auroral
storm
auroral
transitions
auroral
zone
Australia
telescope
aurora
australis
autocollimating
spectrograph
autocollimation
autocorrelation
function
autocorrelator
autoexcitation
autoguider
autoionization
automatic
control
automatic
development
automatic
drive
automatic
focusing
automatic
interplanetary station
automatic
measuring machine
automatic
observatory
automatic
processing
automatic
programmer
automatic
recording device
automatic
reversal system
automatic
telescope
automatic
tracking
automatic
transit circle
autosyn
autumn
autumnal
equinoctial point
autumnal
equinox
autumnal
equinox point
auxiliary
apparatus
auxiliary
equipment
auxiliary
instrumentation
auxiliary
instruments
lens
auxiliary
lens
auxiliary
mirror
auxiliary
telescope
available
observations
available
power
avalanche
photo-diode
average
average
brightness
average
coefficient
average
duration
average
error
average
intensity
average
magnitude
average
refraction
correction for
average
refraction effect
average
speed
averaging
averaging
time
averted
hemisphere
averted
side
averted
vision
aviation
astronomy
zone of
avoidance
universe as
a
whole
rectangular
axes
axial
axial
distribution
axial
inclination
axially
symmetric
axially
symmetric field
axially
symmetric problem
axial
ray
axial
rotation
axial
rotation period
axial
spin
axial
tilt
semi minor
axis
crossed
(axis)
interferometer
cross
axis
mounting
two-fold
axis
of symmetry
polar
axle
axysimmetric
Bolshoj telescop
azimutalnyi
parallax in
azimuth
azimuthal
azimuth(al)
movement
azimuthal
quantum number
azimuth
axis
azimuth
error
azimuth
star
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