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A&ATr
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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
|
F
|
G
|
H
|
I
|
J
|
K
|
L
|
M
|
N
|
O
|
P
|
Q
|
R
|
S
|
T
|
U
|
V
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W
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X
|
Y
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Z
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742 "N"
()
N
Observatorio Astronomico
Nacional
nacreous
clouds
nadir
nadir
measures
Nagler
eyepiece
visible to the
naked
eye
naked-eye
naked
eye brightness
naked-eye
object
naked-eye
star
Bayer
name
Nancay
radio observatory
nanometer
Narrabri
interferometer
narrow-band
narrow-band
burst
narrow
band filter
narrow(-band)
filter
narrow-band
photoelectric photometry
narrow
band photometry
narrow-band
photometry
narrow-band
polarimeter
narrow-range
narrow-range
equipment
NASA
NASA
extragalactic data set
NASA
infrared telescope
NASA,
Nasmyth
Nasmyth
focus
Nasmyth's
focus
Nasmyth
system
National
Aeronautic and Space Administration
National
Astronomical Observatory
National
Center for Radio Astrophysics
Centre
National
d'Etudes Spatiales
National
Optical Astronomy Observatories
National
Solar Observatory
National
Space Science Data Center
natural
breadth
natural
frequency
natural
life time
natural
light
natural
line broadening
natural
satellite
natural
vibrations
natural
width
natural
year
wave
nature
Nautical
almanac
nautical
almanac(k)
nautical
astronomy
nautical
tables
nautical
twilight
United States
Naval
observatory
space
navigation
navigational
instrumentation
navigational
instrumentation
navigational
stars
navigation
satellite
navigation
triangle
n-body
problem
Mars at
near
approach
nearby
galaxies
nearby
stars
near
field response
near
infrared
near
infrared region
nearly
symmetric top
near
point of clear vision
star
near
the zenith
near
ultraviolet
resolution of a
nebula
two colliding
nebulae
nebula
filter
nebula
receding nebulae
nebular
line
nebular
remnant of a supernova
nebular
spectrograph
nebular
stage of nova
nebular-type
transitions
nebular
variables
nebulosity
nebulous
object
negative
negative
absorption
negative
acceleration
negative
branch
negative
cosmological constant
negative
development
negative
drift
negative
energy
negative
excess
negative
eyepiece
negative
image
negative
lens
negative
level
negative
rotational level
solar
neighbourhood
neighbouring
galaxies
neon
NEP
nephelometer
nephoscope
visual
nerve
nested
telescopes
NESTOR
NESTOR
neutrino detector
chromospheric
net
net
flux
deep space
network
Global Oscillation
Network
Group
neutral
absorption
neutral
atom
neutral
filter
neutral
gas
local structure of
neutral
hydrogen
neutral
hydrogen cloud
neutral
hydrogen concentration
neutral
hydrogen content
neutral
hydrogen density
neutral
hydrogen distribution
neutral
hydrogen F
neutral
hydrogen gas
total
neutral
hydrogen mass
neutral
hydrogen motion
neutral
hydrogen region
neutral
medium
neutral
point
neutral
wedge
neutrino
neutrino
astrophysics
SNO
neutrino
detector
solar
neutrino
flux
solar
neutrinos
solar
neutrino
unit
neutron
neutron
diffusion
neutron
number
neutron
star
new
galactic coordinates
new
galactic coordinate system
New
General Catalog
creation of
new
material
new
moon
new
Moon in the old Moon's arms
New
technology telescope
Isaac
Newton
Group
Newtonian
Newtonian-Cassegrain
telescope
Newtonian
cosmology
Newtonian
flat
Newton(ian)
focus
Newtonian
focus position
Newtonian
gravitation
Newtonian
mirror
Newton(ian)
system
Newtonian
telescope
Newtonian
theory
Newton's
law of gravitation
Newton's
rings
Newton's
theory of gravitation
NexStar
NexStar
telescopes
Next
generation space telescope
N-h
profile
Nicol
Nicol
prism
crossed
Nicols
Nicol's
prism
photometrically clear
night
night
airglow
night
correction
night
error
night
glow
nightglow
nightglow
emission
night
hemisphere
night
of observation
night
side
night
sky
night-sky
brightness
night
sky light
night
sky luminance
night-sky
spectrum
nighttime
shower
night-time
stream
night
vision
nimbus
nitrogen
NMR-spectrometer
Nobeyama
observatory
noclilucent
clouds
nocturnal
nocturne
nodal
point
nodal
regression
nodal
surface
longitude of the ascending
node
ascending
node-perihelion
angle
regression of
nodes
nodical
nodical
month
nodical
revolution
white
noise
cosmic radio
noise
absorption
noise
band
noise
bandwidth
noise
behind the signal
cosmic
(noise)
brightness temperature
noise-compensated
radiometer
noise
compensation
noise
continuous noise
noise
current
noise
density
noise
distribution
noise
equivalent power
noise
equivalent resistance
noise
error
receiver
noise
factor
receiver
noise
figure
inherent
(noise)
fluctuations
noise
fluctuations
noise-free
receiver
noise
generator
Hα cosmic
noise
intensity
noise
interference sensitivity
noise
level
cosmic
noise
mapping system
radio
(noise)
outburst
total
noise
power
receiver
noise
(power) level
noise
radiation from antenna
noise
radiation from atmosphere
noise
radiation from radiometer
noise
reduction
noise
signal
standard
noise
source
solar
noise
storm
noise
storm and bursts
receiver
(noise)
temperature
radiometer excess
noise
temperature
noise
voltage
noisiness
of receiver
variable star
nomenclature
nonacid
fixing bath
nonadiabatic
nonbonding
electron
nonbonding
orbital
noncentral
collision
noncoherent
scattering
noncolor
sensitized
nonconservative
case
noncrossing
rule
nondegenerated
species
nondegenerated
vibration
nondirectional
antenna
static
nonempty
model
nonequilibrium
theory
nonequivalent
electron
nongravitational
effects
nongrey
atmosphere
nonhalation
nonhomogeneous
universe
nonionized
nonionized
gas
nonionized
hydrogen region
non-linear
response
nonluminous
gas
non-metals
nonpenetrating
orbit
nonperiodic
variable stars
nonplanar
molecule
nonradial
oscillation
nonrecurrent
disturbance
nonrigid
rotator
nonrigid
symmetric top
nonselective
absorber
nonselective
absorption
nonselective
diffuser
nonselective
radiator
nonspherical
nonspherical
mirror
nonspherical
plate
nonspherical
surface
nonstable
stars
nonstationary
current
nonthermal
background
radio
nonthermal
brightness temperature
nonthermal
component
nonthermal
emission
nonthermal
emitter
nonthermal
mechanism
nonthermal
process
nonthermal
radiation
nonthermal
radiator
nonthermal
radio emission
nonthermal
source
nonthermal
spectrum
nonvignetted
nonvignetted
field
mean
noon
normal
acceleration
normal
coordinates
normal
distribution
normal
doublet
normal
extragalactic nebula
normal
eye
normal
frequency
normal
galaxy
normalization
normalized
detectivity
normal
magnitude
normal
mode vibration
normal
multiplet
normal
optical thickness
normal
radio nebula
normal
ray
normal
slit width
normal
spiral
normal
star
normal
state
normal
substance
normal
term
normal
vibration
normal
Zeeman effect
north
cylindrical
north
bearing
north
celestial pole
north
declination
north
ecliptic pole
north(ern)
bearing
north(ern)
hemisphere
northern
latitude
northern
lights
northern
polarity
northern
sky
north(ern)
stars
north
galactic pole
north
pier
north
point
north
polar cap
north
polar distance
North
Polar Sequence
north
polar spur
north
pole
north-south
antenna
north-south
arm
north-south
direction
north-south
line
notch
filter
nebular stage of
nova
novae
nova
explosion
nova-like
star
nova-like
variable
nova
outburst
nova
spectrum
npa
N-radiation
N-S
arm
N
star
N-type
star
()
ν=1420
nuclear
astrophysics
effective
nuclear
charge
nuclear
deformation
nuclear
disintegration
nuclear
emulsion
nuclear-emulsion
film
nuclear
energy
high altitude
nuclear
explosion
nuclear
fission
nuclear
fusion
nuclear
gas
nuclear
induction
nuclear
magnetic resonance
nuclear
magneton
nuclear
moment
nuclear
plate
nuclear
quadrupole resonance
nuclear
reaction
nuclear
region
nuclear
separation
nuclear
spin
nuclear
star
nuclear
transformations
heavy
nuclei
chamber
nucleogenesis
nucleon
nucleosynthesis
parent
nucleus
nucleus
bands
nuclide
Nuffield
Radio Astronomy Laboratory
null
geodesic
null
line
null
line gap
null
method
null
test
shade
number
number/flux
density count
number/flux
density distribution
number/flux
density relation
number/flux
density statistics
quantum
number
I
number-magnitude
distribution
number
of detectable sources
sunspot
number
period
independent day
numbers
numerical
solution
solar
nutation
nutational
ellipse
nutation
in longitude
nutation
in obliquity
Nyquist
frequency
Nyquist
noise
N-
N-
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