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742 "N"

() N
Observatorio Astronomico Nacional
nacreous clouds
nadir measures
Nagler eyepiece
visible to the naked eye
naked eye brightness
naked-eye object
naked-eye star
Bayer name
Nancay radio observatory
Narrabri interferometer
narrow-band burst
narrow band filter
narrow(-band) filter
narrow-band photoelectric photometry
narrow band photometry
narrow-band photometry
narrow-band polarimeter
narrow-range equipment
NASA extragalactic data set
NASA infrared telescope
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
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
nebulous object
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
visual nerve
nested telescopes
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