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 | ||||
Description | alt | broader | narrower | related |
---|---|---|---|---|
nadir (nadir) | ||||
nadir |
pole |
horizon coordinate system
, zenith |
||
naked singularity (nakedSingularity) | ||||
naked singularity |
singularity |
black hole
, quantum cosmology , space-time singularity , white hole |
||
narrow band photometry (narrowBandPhotometry) | ||||
narrow-band photometry |
CCD photometry
, photoelectric photometry |
H alpha photometry
, H beta photometry |
broad band photometry
, medium band photometry |
|
Nasmyth focus (NasmythFocus) | ||||
Nasmyth focus |
focus |
Cassegrain focus
, Coude focus , Newtonian focus , prime focus , tertiary mirror |
||
natural line broadening (naturalLineBroadening) | ||||
natural line broadening |
line broadening |
natural line width
, spectral line |
||
natural line width (naturalLineWidth) | ||||
natural line width |
line width |
Doppler broadening
, Stark broadening , Zeeman splitting , line broadening , natural line broadening , pressure broadening , spectral line |
||
nautical almanac (nauticalAlmanac) | ||||
nautical almanac |
almanac | ephemeris | ||
Navarro-Frenk-White profile (NavarroFrenkWhiteProfile) | ||||
Navarro-Frenk-White mass-profile |
NFW
, NFW profile , NFW-profile |
mass distribution |
Burkert profile
, exponential profile , isothermal sphere |
|
FVH: new (2007-OCT-5) | ||||
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 | ||||
Description | alt | broader | narrower | related |
N-body problem (NBodyProblem) | ||||
N-body problem |
N body problem
, many body problem , many-body problem |
N-body simulation
, celestial mechanics , orbit , perturbation , stellar dynamics , three-body problem , two-body problem |
||
N-body simulation (NBodySimulation) | ||||
N-body simulation |
numerical simulation | N-body problem | ||
FVH: new (2007-OCT-3) | ||||
nearby dwarf (nearbyDwarf) | ||||
nearby dwarf star |
dwarf
, nearby star |
|||
nearby galaxy (nearbyGalaxy) | ||||
nearby galaxy |
galaxy |
Magellanic cloud
, Local Group |
bright galaxy | |
nearby star (nearbyStar) | ||||
nearby star |
nearby dwarf | trigonometric parallax | ||
near-Earth asteroid (nearEarthAsteroid) | ||||
near-Earth asteroid |
NEO
, near Earth asteroid , near-Earth object |
asteroid | ||
near infrared radiation (nearInfraredRadiation) | ||||
near infrared radiation |
infrared radiation |
H magnitude
, I magnitude , J magnitude , K magnitude , L magnitude , far infrared radiation , infrared photometry |
||
near ultraviolet radiation (nearUltravioletRadiation) | ||||
near ultraviolet radiation |
NUV | ultraviolet radiation |
extreme ultraviolet radiation
, far ultraviolet radiation |
|
nebula (nebula) | ||||
nebula |
interstellar matter |
bipolar nebula
, bright nebula , compact nebula , dark nebula , dense cloud , diffuse nebula , dust nebula , emission nebula , filamentary nebula , gaseous nebula , planetary nebula , reflection nebula , ring nebula |
Opik theory
, forbidden line , forbidden transition , nebular filament , surface photometry |
|
named nebula not included; not including galaxy | ||||
nebular filament (nebularFilament) | ||||
nebular filament |
interstellar matter |
filamentary nebula
, nebula |
||
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 | ||||
Description | alt | broader | narrower | related |
negative H ion (negativeHIon) | ||||
negative hydrogen ion |
H minus ion
, H- , H- ion |
hydrogen |
opacity
, stellar atmosphere |
|
neighborhood (neighborhood) | ||||
neighborhood |
||||
combine with other terms | ||||
neodymium (neodymium) | ||||
neodymium (atomic number 60) |
Nd |
fundamental chemical element
, rare earth |
||
FVH: new (2007-OCT-25) | ||||
neon (neon) | ||||
neon (atomic number 10) |
Ne | fundamental chemical element | ||
FVH: new (2007-OCT-25) | ||||
Neptune (Neptune) | ||||
Neptune |
Jovian planet
, planet |
Solar System | ||
FVH: new (2007-SEP-24) | ||||
neptunium (neptunium) | ||||
neptunium (atomic number 93) |
Np | fundamental chemical element | ||
FVH: new (2007-OCT-25) | ||||
Neumann line (NeumannLine) | ||||
Neumann line |
emission line
, emission spectrum , meteorite |
|||
neutral density filter (neutralDensityFilter) | ||||
neutral density filter |
filter | attenuation | ||
FVH: new (2007-SEP-21) | ||||
neutral gas (neutralGas) | ||||
neutral gas |
gas |
H I
, He I |
H I region | |
neutrino (neutrino) | ||||
neutrino |
elementary particle
, lepton , particle |
antineutrino
, solar neutrino problem , supernova |
||
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 | ||||
Description | alt | broader | narrower | related |
neutron (neutron) | ||||
neutron |
elementary particle
, fundamental particle |
alpha particle
, nucleus atom |
||
neutron star (neutronStar) | ||||
neutron star |
collapsed star
, compact object , degenerate star , relativistic star , stellar object |
HZ Herculis star
, magnetar |
Alfven surface
, X-ray binary star , X-ray burst , X-ray pulsar , low-mass X-ray binary star , pulsar , quark , relativistic astrophysics , supernova remnant |
|
Newtonian focus (NewtonianFocus) | ||||
Newtonian focus |
Newtonian telescope
, focus |
Cassegrain focus
, Coude focus , Nasmyth focus |
||
Newtonian gravitation (NewtonianGravitation) | ||||
Newtonian gravitation |
gravitation |
MOdified Newtonian Dynamics
, general theory of relativity , gravitational constant , gravitational force |
||
Newtonian telescope (NewtonianTelescope) | ||||
Newtonian telescope |
Newtonian focus | |||
N galaxy (NGalaxy) | ||||
N galaxy |
compact galaxy
, galaxy |
Yerkes classification
, galactic nucleus , giant radio galaxy |
||
nickel (nickel) | ||||
nickel (atomic number 28) |
Ni | fundamental chemical element | ||
FVH: new (2007-OCT-25) | ||||
night sky brightness (nightSkyBrightness) | ||||
night sky brightness |
night sky background | sky brightness |
Rayleigh
, Rayleigh scattering , airglow , aurora , gegenschein , zodiacal light |
|
night vision (nightVision) | ||||
night vision |
dark adaption | |||
niobium (niobium) | ||||
niobium (atomic number 41) |
Nb | fundamental chemical element | ||
FVH: new (2007-OCT-25) | ||||
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 | ||||
Description | alt | broader | narrower | related |
nitrogen (nitrogen) | ||||
nitrogen (atomic number 7) |
N | fundamental chemical element | carbon nitrogen cycle | |
FVH: new (2007-OCT-25) | ||||
N magnitude (NMagnitude) | ||||
N magnitude |
apparent magnitude |
far infrared radiation
, infrared photometry |
||
nobelium (nobelium) | ||||
nobelium (atomic number 102) |
No | fundamental chemical element | ||
FVH: new (2007-OCT-25) | ||||
noctilucent cloud (noctilucentCloud) | ||||
noctilucent cloud |
cloud |
Earth atmosphere
, luminescence |
||
in Earth's atmosphere | ||||
node (node) | ||||
node |
line of node |
ascending node
, descending node |
inclination
, orbit , vibration |
|
noise (noise) | ||||
noise |
background noise
, cosmic noise , interference noise , read out noise , shot noise , sky noise |
integration time
, signal-to-noise ratio |
||
FVH: moved interference_noise to NT (2007-OCT-1) | ||||
combine with other terms | ||||
nomenclature (nomenclature) | ||||
nomenclature |
catalog
, classification |
|||
non-equilibrium flow (nonEquilibriumFlow) | ||||
non-equilibrium flow |
nonequilibrium flow | flow | flow instability | |
non-LTE transfer (nonLteTransfer) | ||||
non-LTE transfer |
nonLTE transfer |
energy-transfer
, local thermodynamic equilibrium , radiation mechanism |
||
non-main sequence star (nonMainSequenceStar) | ||||
non-main_sequence star |
nonmain_sequence star |
evolved star
, post-main sequence star , pre-main sequence star |
||
only the broad classes are shown below; specific type will be found under these, or from the hierarchical list | ||||
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 | ||||
Description | alt | broader | narrower | related |
non-radial pulsation (nonRadialPulsation) | ||||
non-radial pulsation |
nonradial pulsation |
ZZ Ceti star
, beta Cephei star , delta Scuti star , pulsating variable star , pulsation mode |
||
non-thermal particle (nonThermalParticle) | ||||
non-thermal particle |
nonthermal particle | non-thermal source | ||
non-thermal radiation (nonThermalRadiation) | ||||
non-thermal radiation |
nonthermal radiation | non-thermal source | ||
non-thermal source (nonThermalSource) | ||||
non-thermal source |
nonthermal source | source |
non-thermal particle
, non-thermal radiation , synchrotron radiation |
|
North Celestial Pole (NorthCelestialPole) | ||||
North Celestial Pole |
NCP
, N.C.P. |
celestial pole | South Celestial Pole | |
North Ecliptic Pole (NorthEclipticPole) | ||||
North Ecliptic Pole |
NEP
, N.E.P. |
ecliptic pole | South Ecliptic Pole | |
northern hemisphere (northernHemisphere) | ||||
northern hemisphere |
southern hemisphere | |||
North Galactic Pole (NorthGalacticPole) | ||||
North Galactic Pole |
NGP
, N.G.P. |
Galactic pole | South Galactic Pole | |
nova-like variable (novaLikeVariable) | ||||
nova-like variable |
cataclysmic variable star |
AM Canum Venaticorum star
, UX Ursae Majoris star , VY Sculpturis star |
||
nova (nova) | ||||
nova |
eruptive binary star
, high-luminosity star |
classical nova
, X-ray nova , fast nova , recurrent nova , slow nova , symbiotic nova |
mass-loss
, optical outburst , pre-nova , progenitor , supernova |
|
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 | ||||
Description | alt | broader | narrower | related |
N star (NStar) | ||||
N star |
late-type star |
spectral type
, technetium star |
||
nuclear astrophysics (nuclearAstrophysics) | ||||
nuclear astrophysics |
high-energy astrophysics
, nuclear physics |
|||
nuclear fission (nuclearFission) | ||||
nuclear fission |
fission
, nuclear reaction |
cosmochronology
, radioactivity |
||
nuclear fusion (nuclearFusion) | ||||
nuclear fusion |
fusion
, nuclear reaction |
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 interior , supernova |
|
nuclear physics (nuclearPhysics) | ||||
nuclear physics |
interaction
, nuclear astrophysics , nuclear radiation , nuclear reaction , strong interaction , weak interaction |
|||
nuclear radiation (nuclearRadiation) | ||||
nuclear radiation |
alpha particle
, electron , gamma-ray radiation , positron |
Cerenkov radiation
, nuclear physics |
||
nuclear reaction (nuclearReaction) | ||||
nuclear reaction |
nuclear fission
, nuclear fusion , urca process |
carbon burning
, nuclear physics , nucleosynthesis , solar neutrino problem |
||
nucleosynthesis (nucleosynthesis) | ||||
nucleosynthesis |
carbon burning
, helium burning , hydrogen burning , oxygen burning , silicon burning |
nuclear reaction
, p process , r-process , s-process , stellar interior , supernova |
||
nucleus atom (nucleusAtom) | ||||
nucleus [atom] |
Bose-Einstein nucleus
, Fermi-Dirac nucleus |
neutron
, proton |
||
nucleus celestial object (nucleusCelestialObject) | ||||
nucleus [celestial object] |
compact nucleus
, galactic nucleus |
cD galaxy
, comet , dirty snowball theory |
||
combine with other terms | ||||
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 | ||||
Description | alt | broader | narrower | related |
numerical analysis (numericalAnalysis) | ||||
numerical analysis |
data processing |
numerical integration
, numerical method , numerical simulation |
||
numerical integration (numericalIntegration) | ||||
numerical integration |
numerical analysis
, numerical method |
|||
numerical method (numericalMethod) | ||||
numerical method |
numerical analysis
, numerical integration , numerical simulation |
|||
numerical simulation (numericalSimulation) | ||||
numerical simulation |
N-body simulation
, SPH simulation |
computer model
, model , numerical analysis , numerical method |
||
nutation (nutation) | ||||
nutation |
Earth rotation
, Moon , equation of the equinox , polar motion , precession |
|||