A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Descriptionaltbroadernarrowerrelated
NADIR      (Nadir)
POLES HORIZON COORDINATE SYSTEM ,
ZENITH
 
NAKED SINGULARITY      (NakedSingularity)
SINGULARITY BLACK HOLES ,
QUANTUM COSMOLOGY ,
SPACETIME SINGULARITY ,
WHITE HOLES
 
NARROW BAND PHOTOMETRY      (NarrowBandPhotometry)
CCD PHOTOMETRY ,
PHOTOELECTRIC PHOTOMETRY 		H ALPHA PHOTOMETRY ,
H BETA PHOTOMETRY 		BROAD BAND PHOTOMETRY ,
MEDIUM BAND PHOTOMETRY
 
NASMYTH FOCUS      (NasmythFocus)
FOCUS CASSEGRAIN FOCUS ,
COUDE FOCUS ,
NEWTONIAN FOCUS ,
PRIME FOCUS
 
NATURAL LINE BROADENING      (NaturalLineBroadening)
LINE BROADENING NATURAL LINE WIDTH ,
SPECTRAL LINES
 
NATURAL LINE WIDTH      (NaturalLineWidth)
LINE WIDTHS DOPPLER BROADENING ,
LINE BROADENING ,
NATURAL LINE BROADENING ,
PRESSURE BROADENING ,
SPECTRAL LINES ,
STARK BROADENING ,
ZEEMAN SPLITTING
 
N BODY PROBLEM      (NBodyProblem)
many body problem CELESTIAL MECHANICS ,
ORBITS ,
PERTURBATION ,
STELLAR DYNAMICS ,
THREE BODY PROBLEM ,
TWO BODY PROBLEM
 
NEARBY DWARF STARS      (NearbyDwarfStars)
DWARF STARS ,
NEARBY STARS
 
  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Descriptionaltbroadernarrowerrelated
NEARBY GALAXIES      (NearbyGalaxies)
GALAXIES LOCAL GROUP OF GALAXIES ,
MAGELLANIC CLOUDS 		BRIGHT GALAXIES
 
NEARBY STARS      (NearbyStars)
NEARBY DWARF STARS TRIGONOMETRIC PARALLAX
 
NEAR EARTH ASTEROIDS      (NearEarthAsteroids)
MINOR PLANETS
 
NEAR INFRARED RADIATION      (NearInfraredRadiation)
INFRARED RADIATION FAR INFRARED RADIATION ,
H MAGNITUDE ,
I MAGNITUDE ,
INFRARED PHOTOMETRY ,
J MAGNITUDE ,
K MAGNITUDE ,
L MAGNITUDE
 
NEAR ULTRAVIOLET RADIATION      (NearUltravioletRadiation)
ULTRAVIOLET RADIATION EXTREME ULTRAVIOLET RADIATION ,
FAR ULTRAVIOLET RADIATION
 
NEBULAE      (Nebulae)
INTERSTELLAR MATTER BIPOLAR NEBULAE ,
BRIGHT NEBULAE ,
COMPACT NEBULAE ,
DARK NEBULAE ,
DENSE CLOUDS ,
DENSE MATTER ,
DIFFUSE NEBULAE ,
DUST NEBULAE ,
EMISSION NEBULAE ,
FILAMENTARY NEBULAE ,
GASEOUS NEBULAE ,
PLANETARY NEBULAE ,
REFLECTION NEBULAE ,
RING NEBULAE 		FILAMENTS [NEBULAE] ,
FORBIDDEN LINES ,
FORBIDDEN TRANSITIONS ,
H II REGIONS ,
OPIK THEORY ,
SURFACE PHOTOMETRY
Named nebulae not included. NOT including galaxies
 
NEGATIVE H ION      (NegativeHIon)
h minus ion OPACITY ,
STELLAR ATMOSPHERES
 
NEIGHBORHOOD      (Neighborhood)
Combine with other terms
 
NEUMANN LINES      (NeumannLines)
EMISSION LINES ,
EMISSION SPECTRA ,
METEORITES
 
NEUTRAL GASES      (NeutralGases)
GASES NEUTRAL HYDROGEN H I REGIONS
 
  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Descriptionaltbroadernarrowerrelated
NEUTRAL HYDROGEN      (NeutralHydrogen)
H I NEUTRAL GASES 21 CM LINE
 
NEUTRINOS      (Neutrinos)
ELEMENTARY PARTICLES ,
LEPTONS ,
PARTICLES 		ANTINEUTRINOS ,
SOLAR NEUTRINO PROBLEM ,
SUPERNOVAS
 
NEUTRONS      (Neutrons)
ELEMENTARY PARTICLES ,
FUNDAMENTAL PARTICLES 		ALPHA PARTICLES ,
NUCLEI [ATOMS]
 
NEUTRON STARS      (NeutronStars)
COLLAPSED STARS ,
COMPACT OBJECTS ,
DEGENERATE STARS ,
RELATIVISTIC STARS 		HZ HERCULIS STARS ALFVEN SURFACE ,
PULSARS ,
QUARKS ,
RELATIVISTIC ASTROPHYSICS ,
SUPERNOVA REMNANTS ,
X RAY BINARY STARS ,
X RAY BURSTS ,
X RAY PULSARS
 
NEW TECHNOLOGY TELESCOPES      (NewTechnologyTelescopes)
OPTICAL TELESCOPES MULTIPLE MIRROR TELESCOPES ,
VERY LARGE TELESCOPES 		COMPUTERS ,
CONTROL SYSTEMS
 
NEWTONIAN FOCUS      (NewtonianFocus)
newtonian telescopes FOCUS CASSEGRAIN FOCUS ,
COUDE FOCUS ,
NASMYTH FOCUS
 
NEWTONIAN GRAVITATION      (NewtonianGravitation)
GENERAL THEORY OF RELATIVITY ,
GRAVITATIONAL CONSTANT ,
GRAVITATIONAL FORCE
 
N GALAXIES      (NGalaxies)
GALAXIES COMPACT GALAXIES ,
GALACTIC NUCLEI ,
GIANT RADIO GALAXIES
 
NIGHT SKY BRIGHTNESS      (NightSkyBrightness)
night sky background SKY BRIGHTNESS AIRGLOW ,
AURORAS ,
GEGENSCHEIN ,
RAYLEIGH ,
RAYLEIGH SCATTERING ,
ZODIACAL LIGHT
 
NIGHT VISION      (NightVision)
DARK ADAPTION
 
  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Descriptionaltbroadernarrowerrelated
N MAGNITUDE      (NMagnitude)
APPARENT MAGNITUDES FAR INFRARED RADIATION ,
INFRARED PHOTOMETRY
 
NOCTILUCENT CLOUDS      (NoctilucentClouds)
CLOUDS EARTH ATMOSPHERE ,
LUMINESCENCE
In earth's atmosphere.
 
NODES      (Nodes)
ascending nodes ,
descending nodes ,
line of nodes 		INCLINATION ,
ORBITS ,
VIBRATION
 
NOISE      (Noise)
interference [noise] BACKGROUND NOISE ,
COSMIC NOISE ,
SHOT NOISE ,
SKY NOISE 		INTEGRATION TIME ,
SIGNAL TO NOISE RATIO
Combine with other terms
 
NOMENCLATURE      (Nomenclature)
CATALOGS ,
CLASSIFICATION
 
NONEQUILIBRIUM FLOW      (NonequilibriumFlow)
FLOW FLOW INSTABILITY
 
NONLTE TRANSFER      (NonlteTransfer)
ENERGY TRANSFER ,
LOCAL THERMODYNAMIC EQUILIBRIUM ,
RADIATION MECHANISMS
 
NONMAINSEQUENCE STARS      (NonmainsequenceStars)
EVOLVED STARS ,
POSTMAINSEQUENCE STARS ,
PREMAINSEQUENCE STARS
Only the broad classes are shown below. Specific types will be found under these, or from the Hierarchical List.
 
NONRADIAL PULSATIONS      (NonradialPulsations)
BETA CEPHEI STARS ,
DELTA SCUTI STARS ,
PULSATING VARIABLE STARS ,
PULSATION MODES ,
ZZ CETI STARS
 
NONTHERMAL PARTICLES      (NonthermalParticles)
NONTHERMAL SOURCES
 
  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Descriptionaltbroadernarrowerrelated
NONTHERMAL RADIATION      (NonthermalRadiation)
NONTHERMAL SOURCES
 
NONTHERMAL SOURCES      (NonthermalSources)
NONTHERMAL PARTICLES ,
NONTHERMAL RADIATION ,
SYNCHROTRON RADIATION
 
NORTH CELESTIAL POLE      (NorthCelestialPole)
CELESTIAL POLES SOUTH CELESTIAL POLE
 
NORTHERN HEMISPHERE      (NorthernHemisphere)
SOUTHERN HEMISPHERE
 
NORTH GALACTIC POLE      (NorthGalacticPole)
GALACTIC POLES SOUTH GALACTIC POLE
 
NOVAS      (Novas)
prenovas ,
symbiotic novas 		CATACLYSMIC VARIABLE STARS ,
ERUPTIVE BINARY STARS ,
HIGH LUMINOSITY STARS 		FAST NOVAS ,
RECURRENT NOVAS ,
SLOW NOVAS ,
X RAY NOVAS 		MASS LOSS ,
OPTICAL OUTBURSTS ,
PROGENITORS ,
SUPERNOVAS
 
NOVOIDS      (Novoids)
SLOW NOVAS
 
N STARS      (NStars)
LATE TYPE STARS SPECTRAL TYPES ,
TECHNETIUM STARS
 
NUCLEAR ASTROPHYSICS      (NuclearAstrophysics)
HIGH ENERGY ASTROPHYSICS ,
NUCLEAR PHYSICS
 
NUCLEAR FISSION      (NuclearFission)
fission NUCLEAR REACTIONS RADIOACTIVITY
 
  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Descriptionaltbroadernarrowerrelated
NUCLEAR FUSION      (NuclearFusion)
fusion NUCLEAR REACTIONS CARBON BURNING ,
HELIUM BURNING ,
OXYGEN BURNING ,
SILICON BURNING 		CARBON FLASH ,
CARBON NITROGEN CYCLE ,
e PROCESS ,
HELIUM FLASH ,
HELIUM SHELL FLASH ,
HYDROGEN BURNING ,
PROTON PROTON REACTION ,
SHELL BURNING ,
STELLAR INTERIORS ,
SUPERNOVAS
 
NUCLEAR PHYSICS      (NuclearPhysics)
INTERACTIONS ,
NUCLEAR ASTROPHYSICS ,
NUCLEAR RADIATION ,
NUCLEAR REACTIONS ,
STRONG INTERACTIONS ,
WEAK INTERACTIONS
 
NUCLEAR RADIATION      (NuclearRadiation)
ALPHA PARTICLES ,
ELECTRONS ,
GAMMA RAYS ,
POSITRONS 		CERENKOV RADIATION ,
NUCLEAR PHYSICS
 
NUCLEAR REACTIONS      (NuclearReactions)
NUCLEAR FISSION ,
NUCLEAR FUSION ,
URCA PROCESSES 		CARBON BURNING ,
NUCLEAR PHYSICS ,
NUCLEOSYNTHESIS ,
SOLAR NEUTRINO PROBLEM
 
NUCLEI [ATOMS]      (NucleiAtoms)
BOSE EINSTEIN NUCLEI ,
FERMI DIRAC NUCLEI 		NEUTRONS ,
PROTONS
 
NUCLEI [CELESTIAL OBJECTS]      (NucleiCelestialObjects)
COMPACT NUCLEI ,
GALACTIC NUCLEI 		cD GALAXIES ,
COMETS ,
DIRTY SNOWBALL THEORY
Combine with other terms
 
NUCLEOSYNTHESIS      (Nucleosynthesis)
CARBON BURNING ,
HELIUM BURNING ,
HYDROGEN BURNING ,
OXYGEN BURNING ,
SILICON BURNING 		NUCLEAR REACTIONS ,
p PROCESS ,
r PROCESS ,
s PROCESS ,
STELLAR INTERIORS ,
SUPERNOVAS
 
NUMERICAL ANALYSIS      (NumericalAnalysis)
DATA PROCESSING NUMERICAL INTEGRATION ,
NUMERICAL METHODS ,
NUMERICAL SIMULATION
 
NUMERICAL INTEGRATION      (NumericalIntegration)
NUMERICAL ANALYSIS ,
NUMERICAL METHODS
 
NUMERICAL METHODS      (NumericalMethods)
NUMERICAL ANALYSIS ,
NUMERICAL INTEGRATION ,
NUMERICAL SIMULATION
 
  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Descriptionaltbroadernarrowerrelated
NUMERICAL SIMULATION      (NumericalSimulation)
COMPUTER MODELS ,
MODELS ,
NUMERICAL ANALYSIS ,
NUMERICAL METHODS
 
NUTATION      (Nutation)
EARTH ROTATION ,
EQUATION OF THE EQUINOXES ,
MOON ,
POLAR MOTION ,
PRECESSION
 
Thu Jul 3 15:11:37 2008