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astro-ph
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A&ATr
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--
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A
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B
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C
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D
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E
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F
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G
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H
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I
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J
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K
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L
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M
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N
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O
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P
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Q
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R
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S
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T
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U
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V
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W
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X
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Y
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Z
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259 "U"
U-B
U-B
color index
U
burst
U,
B, V
UBV
U,
B, V magnitude
UBV
photometric system
UBV-photometry
UBV-
U
Geminorum stars
UK
infrared telescope
UK
Schmidt telescope
ultimate
lines
raies
ultimes
vacuum
ultraviolet
ultraviolet
absorption
ultraviolet
astronomy
ultraviolet
data
ultraviolet
emission
ultraviolet
excess
ultraviolet
image
ultraviolet
light
ultraviolet
plate
ultraviolet
radiation
ultraviolet
range
ultraviolet
rays
extreme
ultraviolet
region
ultraviolet
spectrum
ultra-wide
angle eyepiece
U-magnitude
sunspot
umbra
U-measure
unaided
eye
unbound
electron
uncertainty
uncertainty
of measurement
uncertainty
of observation
uncertainty
principle
spin
uncoupling
under
bad seeing
under
conditions of weightlessness
underdeveloped
underexposed
region of
under-exposure
underexposure
under
good seeing
under
observation
under-sampling
undisturbed
undisturbed
photosphere
undisturbed
photospheric region
undisturbed
Sun
undriven
camera
undulation
uneven
development
uneven
drying
uneven
emulsion
uneven
fixing
un-filled
aperture
unfilled
aperture
unfilled
aperture antenna
technique of
unfilled
apertures
unidentified
band
unidentified
radio star
unidentified
source
unified
field theory
uniform
development
uniform
diffuser
uniform
model universe
uniform
motion
uniform
sidereal time
unilluminated
hemisphere
unilluminated
side
International Astronomical
Union
unionized
unionized
hydrogen
unipolar
unipolar
group
unipolar
magnetic region
unipolar
spot
unipolar
sunspot
solar neutrino
unit
unit
angle
unit
brightness
column of
unit
cross sectional area
united
atom
United
States Naval observatory
unit
for Zeeman effect
electron density per
unit
length
unit
power finder
unit
weight
law of
universal
gravitation
universal
instrument
universal
time
visible
universe
universe
as a whole
universe
in the large
Association of
Universities
for Research in Astronomy
Mount John
University
observatory
unmanned
artificial satellite
unperturbed
orbit
unpolarized
unpolarized
burst
unpolarized
component
unpolarized
continuum
unpolarized
light
unpolarized
radiation
unresolved
unresolved
bands
unresolved
lines
unresolved
sources
unsensitized
emulsion
unsharp
masking
unstable
unstable
equilibrium
unstable
state
unsteady
image
unvignetted
unvignetted
field
unwanted
signal
to set
up
uplands
upper
atmosphere
upper
chromosphere
upper
conjunction
upper
culmination
upper
end of tube
upper
level
upper
polar(-axis) bearing
upper
transit
upright
image
uranium
W
Ursae
Majoris star
receiver
using
Dicke switch
UT
uvby
uvby
photometric system
uv
plane
UV-ray
picture
uv-
UWA
eyepiece
UWA-
()
U
U
,
()
U,
()
U,
,
()
U,
, V
U-
U-
U-
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