| 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 |
|---|---|---|---|---|
| radar astronomy (radarAstronomy) | ||||
|
radar astronomy |
radio astronomy |
radar
, radar equipment , radar telescope , radio observatory |
||
| radar equipment (radarEquipment) | ||||
|
radar equipment |
antenna |
radar astronomy
, radio telescope |
||
| radar mapping (radarMapping) | ||||
|
radar mapping |
map | |||
| radar (radar) | ||||
|
radar |
optical radar |
Doppler effect
, antenna , radar astronomy |
||
| radar telescope (radarTelescope) | ||||
|
radar telescope |
radio telescope |
dish antenna
, parabolic reflector , radar astronomy |
||
| radial pulsation (radialPulsation) | ||||
|
radial pulsation |
BL Herculis star
, Cepheid , He II ionization zone , Mira variable star , RV Tauri star , beta Cephei star , delta Scuti star |
|||
| radial velocity (radialVelocity) | ||||
|
radial velocity |
space motion
, velocity |
iodine cell |
Doppler effect
, kinematics , line shift , peculiar motion , peculiar velocity , proper motion , redshift , spectroscopy , stellar dynamics , stellar motion , tangential velocity , transverse velocity , virial theorem |
|
| radiant meteor (radiantMeteor) | ||||
|
radiant [meteor] |
meteor shower
, meteor stream , meteor trail , meteor |
|||
| radiant moving cluster (radiantMovingCluster) | ||||
|
radiant [moving cluster] |
moving cluster parallax
, open star cluster , proper motion |
|||
| radiation belt (radiationBelt) | ||||
|
radiation belt |
van Allen radiation belt |
Earth
, atmosphere , plasma |
||
| 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 |
| radiation damping (radiationDamping) | ||||
|
radiation damping |
damping constant
, decay oscillation , radiative braking |
|||
| radiation field (radiationField) | ||||
|
radiation field |
electromagnetic field | |||
| radiation mechanism (radiationMechanism) | ||||
|
radiation mechanism |
free-bound emission
, free-free emission |
Cerenkov radiation
, Rayleigh limit , bremsstrahlung , cyclotron radiation , gravitational radiation , non-LTE transfer , relativistic particle , relativistic plasma , synchrotron radiation |
||
| radiation pressure (radiationPressure) | ||||
|
radiation pressure |
Eddington limit
, Poynting-Robertson effect , photon , pressure , solar wind , stellar wind |
|||
| radiation (radiation) | ||||
|
radiation |
Cerenkov radiation
, X-ray radiation , background radiation , continuum radiation , cosmic ray , cyclotron radiation , electromagnetic radiation , gamma-ray radiation , gravitational radiation , high-energy radiation , infrared radiation , polarized radiation , synchrotron radiation , thermal radiation , ultraviolet radiation |
Planck black body formula
, absorption , albedo , bolometer , effective temperature , emissivity , energy-transfer , flux density , illumination , irradiance , opacity , photon , radiative equilibrium , recombination line , solar constant |
||
| FVH: moved lots of NT's to electromagnetic_radiation (2007-OCT-8) | ||||
| combine with other terms | ||||
| radiation scattering (radiationScattering) | ||||
|
radiation scattering |
electromagnetic wave scattering |
Compton scattering
, Rayleigh scattering , Thomson scattering , X-ray scattering , light scattering |
Compton effect
, Raman effect , electrostatic wave , elementary particle scattering , light polarization , phase function , photon , scattering , zodiacal light |
|
| radiative braking (radiativeBraking) | ||||
|
radiative braking |
damping constant
, dynamical friction , radiation damping , rotating star |
|||
| radiative equilibrium (radiativeEquilibrium) | ||||
|
radiative equilibrium |
absorption
, electromagnetic radiation , radiation , temperature |
|||
| radiative recombination (radiativeRecombination) | ||||
|
radiative recombination |
radiative capture |
airglow
, electron , photon , plasma |
||
| radiative transfer (radiativeTransfer) | ||||
|
radiative transfer |
energy-transfer |
Rayleigh limit
, opacity , transport process |
||
| 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 |
| radical (radical) | ||||
|
radical |
composite particle | hydroxyl radical | ion | |
| radio absorption (radioAbsorption) | ||||
|
radio absorption |
H I region
, interstellar matter , ionosphere |
|||
| radioactive decay (radioactiveDecay) | ||||
|
radioactive decay |
radioactivity | |||
| radioactivity (radioactivity) | ||||
|
radioactivity |
alpha particle
, electron , gamma-ray radiation , nuclear fission , positron , radioactive decay |
|||
| radio antenna (radioAntenna) | ||||
|
radio antennas |
radio antennas | antenna |
polar diagram
, radio telescope , sidelobe |
|
| radio astrometry (radioAstrometry) | ||||
|
radio astrometry |
astrometry
, observing technique , radio astronomy |
interferometry
, long baseline interferometry , very long baseline interferometry |
||
| radio astronomy (radioAstronomy) | ||||
|
radio astronomy |
millimeter astronomy
, radar astronomy , radio astrometry , submillimeter astronomy |
clean method | ||
| use as nts all terms associated with radio astronomy | ||||
| radio background (radioBackground) | ||||
|
radio background |
radio frequency interference
, radio noise |
background radiation |
X-ray background
, cosmic noise , gamma-ray background , microwave background , radio interference , radio radiation , ultraviolet background |
|
| radio burst (radioBurst) | ||||
|
radio burst |
burst |
X-ray burst
, burster , gamma-ray burst , optical burst |
||
| radio core (radioCore) | ||||
|
radio core |
radio source | |||
| 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 |
| radio emission (radioEmission) | ||||
|
radio emission |
emission spectrum | |||
| see radio radiation | ||||
| radio flare (radioFlare) | ||||
|
radio flare |
flare | flare star | ||
| radio frequency (radioFrequency) | ||||
|
radio frequency |
21-cm line
, Paul trap , radio radiation , radio spectrum , spectral index |
|||
| radio galaxy (radioGalaxy) | ||||
|
radio galaxy |
extragalactic radio source
, galaxy |
Ep galaxy
, giant radio galaxy , head tail galaxy |
Fanaroff-Riley class
, X-ray source , active galactic nucleus |
|
| radioheliograph (radioheliograph) | ||||
|
radioheliograph |
radio telescope
, solar telescope |
|||
| radio interference (radioInterference) | ||||
|
radio interference |
radio frequency interference
, radio noise |
cosmic noise | radio background | |
| radio interferometer (radioInterferometer) | ||||
|
radio interferometer |
interferometer
, radio telescope |
long baseline interferometer
, t array , very long baseline interferometer , y array |
array
, pencil beam , phased array , radio interferometry , radio observatory |
|
| radio interferometry (radioInterferometry) | ||||
|
radio interferometry |
interferometry
, observing technique |
long baseline interferometry
, very long baseline interferometry |
interference wave
, radio interferometer , time synchronization |
|
| see radio interferometer | ||||
| radio jet (radioJet) | ||||
|
radio jet |
jet | radio source | ||
| radiometer (radiometer) | ||||
|
radiometer |
detector
, measuring instrument |
Dicke radiometer |
bolometer
, photometer , radiometry |
|
| 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 |
| radiometry (radiometry) | ||||
|
radiometry |
radiometer | |||
| radio observatory (radioObservatory) | ||||
|
radio observatory |
observatory |
millimeter astronomy
, radar astronomy , radio interferometer , radio telescope , submillimeter astronomy |
||
| radio occultation (radioOccultation) | ||||
|
radio occultation |
occultation | |||
| radio pulsar (radioPulsar) | ||||
|
radio pulsar |
pulsar | optical pulsar | ||
| radio quiet quasar (radioQuietQuasar) | ||||
|
radio quiet quasar |
quasar | |||
| radio radiation (radioRadiation) | ||||
|
radio radiation |
radio wave | electromagnetic radiation |
Jansky
, radio background , radio frequency , radio source |
|
| FVH: moved BT radiation to BT electromagnetic_radiation and radio_wave to ALT (2007-OCT-8) | ||||
| synonym: radio emission | ||||
| radio recombination line (radioRecombinationLine) | ||||
|
radio recombination line |
recombination line | 21-cm line |
H I region
, H II region , maser |
|
| radio source catalog (radioSourceCatalog) | ||||
|
radio source catalog |
catalog | radio source count | ||
| combine with other terms | ||||
| radio source count (radioSourceCount) | ||||
|
radio source count |
observational cosmology
, radio source catalog , radio source , statistics , survey |
|||
| radio source (radioSource) | ||||
|
radio source |
source |
OH source
, compact source , discrete radio source , extended source , extragalactic radio source , head tail galaxy , pulsar , radio star , variable source |
SiO maser
, bipolar outflow , galaxy encounter , interplanetary scintillation , interstellar scintillation , ionospheric scintillation , jet , lobe , maser , optical identification , radio core , radio jet , radio radiation , radio source count , supernova remnant |
|
| 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 |
| radio spectrograph (radioSpectrograph) | ||||
|
radio spectrograph |
radio spectrometer | spectrograph |
radio spectrum
, radio spectroscopy |
|
| radio spectroscopy (radioSpectroscopy) | ||||
|
radio spectroscopy |
radio spectrum
, radio spectrograph |
|||
| radio spectrum (radioSpectrum) | ||||
|
radio spectrum |
spectrum |
microwave spectrum
, radio frequency , radio spectrograph , radio spectroscopy , spectral index |
||
| radio star (radioStar) | ||||
|
radio star |
radio source | flare star | X-ray star | |
| radio structure (radioStructure) | ||||
|
radio structure |
lobe |
bipolar outflow
, compact source , contour map , drift scan , extended source , head tail galaxy |
||
| radio telescope (radioTelescope) | ||||
|
radio telescope |
telescope |
Cassegrain antenna
, Mills cross antenna , Yagi antenna , dish antenna , radar telescope , radio interferometer , radioheliograph , very long baseline interferometer |
antenna design
, antenna , apodization , array , beam switching , beamwidth , feed horn , half-wave dipole , interferometer , parabolic reflector , phase rotator , phase switching , radar equipment , radio antenna , radio observatory , receiver , shaped reflector , subreflector |
|
| not a complete list of terms | ||||
| radio transmission window (radioTransmissionWindow) | ||||
|
radio transmission window through the atmosphere |
atmospheric window |
infrared transmission window
, interstellar matter , optical transmission window |
||
| FVH: renamed to avoid confusion with optics (2007-NOV-2) | ||||
| low absorption in atmosphere | ||||
| radio waveguide (radioWaveguide) | ||||
|
radio waveguide |
waveguide | horn antenna | ||
| radium (radium) | ||||
|
radium (atomic number 88) |
Ra | fundamental chemical element | ||
| FVH: new (2007-OCT-25) | ||||
| radius-luminosity relation (radiusLuminosityRelation) | ||||
|
radius-luminosity relation |
radius luminosity relation | statistical relation | fundamental plane |
Cepheid
, period-color relation , period-density relation , period-luminosity-color relation , period-luminosity relation , period-mass relation , period-radius relation , period-spectrum relation |
| 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 |
| radon (radon) | ||||
|
radon (atomic number 86) |
Rn | fundamental chemical element | ||
| FVH: new (2007-OCT-25) | ||||
| RAID array (RaidArray) | ||||
|
RAID array of hard disk |
data storage | |||
| FVH: new (2007-NOV-2) | ||||
| Raman effect (RamanEffect) | ||||
|
Raman effect |
Raman scattering
, Raman spectrum , Raman spectroscopy , absorption spectrum , emission spectrum , radiation scattering |
|||
| Raman scattering (RamanScattering) | ||||
|
Raman scattering |
Raman effect | |||
| see Raman effect | ||||
| Raman spectroscopy (RamanSpectroscopy) | ||||
|
Raman spectroscopy |
spectroscopy |
Raman effect
, molecular spectrum |
||
| see Raman effect | ||||
| Raman spectrum (RamanSpectrum) | ||||
|
Raman spectrum |
Raman effect
, light scattering |
|||
| see Raman effect | ||||
| Ramsden eyepiece (RamsdenEyepiece) | ||||
|
Ramsden eyepiece |
eyepiece | |||
| range finder (rangeFinder) | ||||
|
range finder |
measuring instrument | distance | ||
| Rankine-Hugoniot relation (RankineHugoniotRelation) | ||||
|
Rankine-Hugoniot relation |
density
, pressure , shock wave |
|||
| rapid burst (rapidBurst) | ||||
|
rapid burst |
burst |
X-ray burst
, gamma-ray burst |
||
| 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 |
| rapid oscillation (rapidOscillation) | ||||
|
rapid oscillation |
Ap star
, asteroseismology , pulsar |
|||
| rare earth (rareEarth) | ||||
|
rare earth |
fundamental chemical element |
cerium
, dysprosium , erbium , europium , gadolinium , holmium , lanthanum , lutetium , neodymium , praseodymium , samarium , scandium , terbium , thulium , ytterbium , yttrium |
abundance
, metal abundance , metal line |
|
| R association (RAssociation) | ||||
|
R association |
R-association | star association |
reflection nebula
, young star |
|
| ratio (ratio) | ||||
|
ratio |
axial ratio | |||
| ES: new (2007-OCT-11) | ||||
| Rayleigh (Rayleigh) | ||||
|
Rayleigh |
aurora
, night sky brightness |
|||
| solar aurora flux unit | ||||
| Rayleigh criterion (RayleighCriterion) | ||||
|
Rayleigh criterion |
Rayleigh limit |
diffraction
, resolution |
||
| Rayleigh limit (RayleighLimit) | ||||
|
Rayleigh limit |
radiation mechanism
, radiative transfer |
|||
| refers to radiation mechanism | ||||
| Rayleigh number (RayleighNumber) | ||||
|
Rayleigh number |
convection
, thermal stability |
|||
| Rayleigh scattering (RayleighScattering) | ||||
|
Rayleigh scattering |
light scattering
, radiation scattering |
Compton scattering
, Mie scattering , Thomson scattering , airglow , interstellar absorption , night sky brightness |
||
| Rayleigh-Taylor instability (RayleighTaylorInstability) | ||||
|
Rayleigh-Taylor instability |
instability | fluid mechanics | ||
| 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 |
| ray (ray) | ||||
|
lunar ray |
Moon | |||
| refers to lunar feature | ||||
| Razin effect (RazinEffect) | ||||
|
Razin effect |
synchrotron radiation | |||
| also Razin-Tsytovich effect | ||||
| R Canis Majoris star (RCanisMajorisStar) | ||||
|
R Canis Majoris star |
R CMa star | eclipsing binary star | ||
| R Coronae Borealis star (RCoronaeBorealisStar) | ||||
|
R Coronae Borealis star |
R Cor Bor star
, RCB star |
irregular variable star |
circumstellar dust
, circumstellar grain , supergiant |
|
| read out noise (readOutNoise) | ||||
|
read-out noise |
RON | noise | charge-coupled device | |
| FVH: new (2007-SEP-21) | ||||
| real anomaly (realAnomaly) | ||||
|
real anomaly |
orbital anomaly | |||
| receiver (receiver) | ||||
|
receiver |
correlation
, detector , interferometric correlation , phase sensitive detector , phase switching , radio telescope |
|||
| recombination line (recombinationLine) | ||||
|
recombination line |
emission line | radio recombination line |
electromagnetic radiation
, radiation , recombination , spectrum |
|
| recombination (recombination) | ||||
|
recombination |
electron
, photoionization , recombination line |
|||
| recurrent nova (recurrentNova) | ||||
|
recurrent nova |
nova |
fast nova
, slow nova |
||
| 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 |
| reddened star (reddenedStar) | ||||
|
reddened star |
absorption
, interstellar absorption , interstellar reddening , reddening , reddening law |
|||
| reddening law (reddeningLaw) | ||||
|
reddening law |
gas to dust ratio
, interstellar reddening , reddened star , selective absorption |
|||
| reddening (reddening) | ||||
|
reddening |
interstellar reddening |
absorption
, intergalactic absorption , interstellar absorption , interstellar dust , interstellar gas , intrinsic color , reddened star , selective absorption |
||
| red dwarf flare star (redDwarfFlareStar) | ||||
|
red dwarf flare star |
flare star
, late-type dwarf |
|||
| red dwarf (redDwarf) | ||||
|
red dwarf star |
||||
| see late-type dwarf star | ||||
| red giant bump (redGiantBump) | ||||
|
red giant bump |
red bump | giant branch | metal-rich star | |
| ES: new (2007-OCT-8) | ||||
| red giant clump (redGiantClump) | ||||
|
red giant clump |
red clump | giant branch | ||
| ES: new (2007-OCT-8) | ||||
| red giant (redGiant) | ||||
|
red giant star |
||||
| see late-type giant star | ||||
| red giant tip (redGiantTip) | ||||
|
red giant tip |
giant branch |
Hertzsprung-Russell diagram
, RGB tip distance , carbon flash , evolved star , helium flash , late-type giant |
||
| redshift distance relation (redshiftDistanceRelation) | ||||
|
redshift-distance relation |
Dark Energy
, cosmological distance scale , cosmology , observational cosmology |
|||
| 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 |
| redshift magnitude relation (redshiftMagnitudeRelation) | ||||
|
redshift-magnitude relation |
Dark Energy
, Hubble constant , Hubble diagram , Hubble law , cosmological distance scale , cosmology |
|||
| redshift (redshift) | ||||
|
redshift |
red shift |
Doppler effect
, line shift |
gravitational redshift |
Hubble diagram
, Hubble law , Lyman alpha forest , Tully-Fisher relation , cosmological distance scale , cosmology , frequency shift , k correction , observational cosmology , radial velocity |
| red star (redStar) | ||||
|
red star |
||||
| see either late-type star or reddened star | ||||
| red supergiant (redSupergiant) | ||||
|
red supergiant star |
||||
| see late-type supergiant star | ||||
| reduction method (reductionMethod) | ||||
|
reduction method |
analysis
, astronomical technique , data processing , data reduction |
|||
| reference frame (referenceFrame) | ||||
|
reference frame |
coordinate system | |||
| reference system (referenceSystem) | ||||
|
reference system |
astrometry
, coordinate system , position , spherical coordinate |
|||
| reflecting telescope (reflectingTelescope) | ||||
|
reflecting telescope |
reflector | optical telescope |
Baker-Nunn camera
, Bouwers telescope , Maksutov telescope , Ritchey-Chretien telescope , Schmidt telescope , coelostat , multiple mirror telescope , wide-field telescope |
parabolic reflector
, primary mirror , secondary mirror , tertiary mirror |
| refers to optical telescope | ||||
| reflection grating (reflectionGrating) | ||||
|
reflection grating |
diffraction grating |
echelle grating
, objective grating , transmission grating |
||
| reflection nebula (reflectionNebula) | ||||
|
reflection nebula |
interstellar matter
, nebula |
R association | ||
| 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 |
| reflection (reflection) | ||||
|
reflection |
albedo
, mirror , refraction , scattering , thin film , transmission |
|||
| reflector antenna (reflectorAntenna) | ||||
|
reflector antenna |
reflector antennas | antenna | ||
| refracting telescope (refractingTelescope) | ||||
|
refracting telescope |
optical telescope | zenith telescope | primary lens | |
| refraction angle (refractionAngle) | ||||
|
angle of refraction |
angle of refraction |
atmosphere
, zenith distance |
||
| in Earth's atmosphere | ||||
| refraction (refraction) | ||||
|
refraction |
electromagnetic radiation
, lens , reflection , refractive index , scattering , transmission , visible radiation , wave propagation |
|||
| refractive index (refractiveIndex) | ||||
|
refractive index |
optical property |
atmospheric refraction
, lens , optical pathlength , optics , refraction |
||
| regression of node (regressionOfNode) | ||||
|
regression of node |
Moon
, orbital element |
|||
| relativistic astrophysics (relativisticAstrophysics) | ||||
|
relativistic astrophysics |
black hole
, cosmology , gravity , neutron star , relativistic cosmology |
|||
| relativistic cosmology (relativisticCosmology) | ||||
|
relativistic cosmology |
cosmology | relativistic astrophysics | ||
| relativistic disk (relativisticDisk) | ||||
|
relativistic discs UK relativistic disk |
relativistic effect
, relativistic electron , relativistic plasma , relativity |
|||
| 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 |
| relativistic effect (relativisticEffect) | ||||
|
relativistic effect |
relativistic disk
, relativistic electron , relativistic plasma , relativity |
|||
| relativistic electron (relativisticElectron) | ||||
|
relativistic electron |
electron beam
, relativistic particle |
relativistic disk
, relativistic effect , synchrotron radiation |
||
| relativistic fluid dynamics (relativisticFluidDynamics) | ||||
|
relativistic fluid dynamics |
fluid dynamics
, relativistic mechanics |
|||
| relativistic mechanics (relativisticMechanics) | ||||
|
relativistic mechanics |
relativistic fluid dynamics | relativity | ||
| relativistic particle (relativisticParticle) | ||||
|
relativistic particle |
particle | relativistic electron | radiation mechanism | |
| relativistic plasma (relativisticPlasma) | ||||
|
relativistic plasma |
relativistic gas |
gas
, plasma |
radiation mechanism
, relativistic disk , relativistic effect , relativity |
|
| relativistic star (relativisticStar) | ||||
|
relativistic star |
black hole
, neutron star , pulsar |
X-ray source
, relativity |
||
| relativistic velocity (relativisticVelocity) | ||||
|
relativistic velocity |
velocity |
Big Bang theory
, cosmology , quantum mechanics , relativity |
||
| relativity (relativity) | ||||
|
relativity |
cosmogony | general theory of relativity |
field equation
, gravitation , inertial coordinate system , inertial reference frame , relativistic disk , relativistic effect , relativistic mechanics , relativistic plasma , relativistic star , relativistic velocity |
|
| relaxation time (relaxationTime) | ||||
|
relaxation time |
age
, galaxy cluster , star cluster , stellar dynamics |
|||
| 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 |
| remote control system (remoteControlSystem) | ||||
|
remote control system |
control system |
automated telescope
, automatic patrol telescope , telescope instrument , telescope |
||
| remote sensing (remoteSensing) | ||||
|
remote sensing |
detector
, infrared radiation , microwave radiation |
|||
| research (research) | ||||
|
research |
design
, discoveries , observation , theory |
|||
| reseaux (reseaux) | ||||
|
reseaux |
calibration
, grid , photographic plate , spectroscopy |
|||
| residual intensity (residualIntensity) | ||||
|
residual intensity |
absorption line
, line profile |
|||
| resolution (resolution) | ||||
|
resolution |
angular resolution
, spectral resolution |
Rayleigh criterion
, interferometry , optics , pixel , sensitivity , sidelobe , visual acuity |
||
| resonance gap (resonanceGap) | ||||
|
resonance gap |
Kirkwood gap |
asteroid
, planetary ring , planet , shepherd satellite |
||
| resonance line (resonanceLine) | ||||
|
resonance line |
H alpha
, Lyman alpha |
spectrum | ||
| not a complete list of terms | ||||
| retardation (retardation) | ||||
|
retardation |
||||
| combine with other terms | ||||
| reticle (reticle) | ||||
|
reticle |
eyepiece
, graticule , grid |
|||
| 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 |
| reticon array (reticonArray) | ||||
|
reticon array |
multi-channel detector | diode array | ||
| rgb photometry (rgbPhotometry) | ||||
|
rgb photometry |
red-green-blue photometry |
broad band photometry
, photometric system |
||
| FVH: new (2007-SEP-21) | ||||
| RGB tip distance (RgbTipDistance) | ||||
|
distance obtained from the tip of the red giant branch |
distance measurement | red giant tip | ||
| ES: new (2007-OCT-8) | ||||
| rgu photometry (rguPhotometry) | ||||
|
rgu photometry |
broad band photometry | |||
| rhenium (rhenium) | ||||
|
rhenium (atomic number 75) |
Re | fundamental chemical element | ||
| FVH: new (2007-OCT-25) | ||||
| rho Cassiopeiae star (rhoCassiopeiaeStar) | ||||
|
rho Cassiopeiae star |
rho Cas star | |||
| rhodium (rhodium) | ||||
|
rhodium (atomic number 45) |
Rh | fundamental chemical element | ||
| FVH: new (2007-OCT-25) | ||||
| Right Ascension (RightAscension) | ||||
|
Right Ascension |
celestial longitude |
equatorial coordinate system
, longitude |
Declination
, celestial equator , equator , hour angle , transit time |
|
| rigid body rotation (rigidBodyRotation) | ||||
|
rigid body rotation |
rotation | rotating body | ||
| rill (rill) | ||||
|
rill |
planet
, satellite |
|||
| 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 |
| ring division (ringDivision) | ||||
|
ring division |
planetary ring
, planet |
|||
| ring galaxy (ringGalaxy) | ||||
|
ring galaxy |
galaxy
, peculiar galaxy |
ring | ||
| ring nebula (ringNebula) | ||||
|
ring nebula |
nebula | planetary nebula | ||
| ring (ring) | ||||
|
ring |
planetary ring
, stellar ring |
ansa
, ring galaxy |
||
| Ritchey-Chretien telescope (RitcheyChretienTelescope) | ||||
|
Ritchey-Chretien telescope |
RC | reflecting telescope | ||
| R magnitude (RMagnitude) | ||||
|
R magnitude |
apparent magnitude |
Bessel photometry
, Johnson photometry , Kron-Cousins photometry |
||
| Roche limit (RocheLimit) | ||||
|
Roche limit |
close binary star
, gravitation , orbit , planetary ring , planet , tidal disruption |
|||
| Roche lobe (RocheLobe) | ||||
|
Roche lobe |
close binary star
, eclipsing binary star , interacting binary star , tidal interaction |
|||
| rocket-borne instrument (rocketBorneInstrument) | ||||
|
rocket-borne instrument |
rocket borne instrument |
X-ray astronomy
, airplane-borne instrument , balloon-borne instrument , cosmic ray astronomy , gamma-ray astronomy , ground-based astronomy , infrared observatory , satellite-borne instrument , space probe instrument , space telescope , ultraviolet astronomy |
||
| roentgenium (roentgenium) | ||||
|
roentgenium (atomic number 111) |
Rg | 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 |
| Rosseland opacity (RosselandOpacity) | ||||
|
Rosseland opacity |
opacity |
Kramers opacity
, absorption , stellar interior |
||
| rotating body (rotatingBody) | ||||
|
rotating body |
asteroid
, circumstellar disk , comet , dwarf planet , galaxy , planet , rotating star |
rigid body rotation
, rotation |
||
| rotating shell (rotatingShell) | ||||
|
rotating shell |
circumstellar shell | |||
| rotating star (rotatingStar) | ||||
|
rotating star |
rotating body | periodic variable star |
radiative braking
, synchronous rotation , von Zeipel theorem |
|
| rotational velocity (rotationalVelocity) | ||||
|
rotational velocity |
velocity |
rotation
, tangential velocity |
||
| ES: new (2007-OCT-11) | ||||
| rotation (rotation) | ||||
|
rotation |
Earth rotation
, Galactic rotation , differential rotation , galaxy rotation curve , rigid body rotation , synchronous rotation |
angular momentum
, angular velocity , equatorial bulge , oblateness , period , rotating body , rotational velocity |
||
| combine with other terms | ||||
| r-process (rProcess) | ||||
|
r-process |
r process |
nucleosynthesis
, p process , s-process , supernova |
||
| RRab star (RrabStar) | ||||
|
RRab star |
RR Lyrae star | |||
| RRa star (RraStar) | ||||
|
RRa star |
RR Lyrae star | |||
| RRb star (RrbStar) | ||||
|
RRb star |
RR Lyrae star | |||
| 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 |
| RRc star (RrcStar) | ||||
|
RRc star |
RR Lyrae star | |||
| RR Lyrae star (RrLyraeStar) | ||||
|
RR Lyrae star |
cluster type variable star |
double-mode variable star
, population II Cepheid , pulsating variable star |
Bailey type
, RRa star , RRab star , RRb star , RRc star |
BL Herculis star
, Blazhko effect , Cepheid , Galactic halo , Oosterhoff group , W Virginis star , globular star cluster , horizontal branch star |
| RR Telescopii star (RrTelescopiiStar) | ||||
|
RR Telescopii star |
||||
| RS Canum Venaticorum star (RsCanumVenaticorumStar) | ||||
|
RS Canum Venaticorum star |
X-ray source
, binary star , multi-periodic variable star |
starspot | ||
| R star (RStar) | ||||
|
R star |
giant
, late-type star |
carbon star
, spectral type |
||
| rubidium (rubidium) | ||||
|
rubidium (atomic number 37) |
Rb | fundamental chemical element | ||
| FVH: new (2007-OCT-25) | ||||
| runaway star (runawayStar) | ||||
|
runaway star |
OB star
, binary star , high-velocity star , supernova |
|||
| ruthenium (ruthenium) | ||||
|
ruthenium (atomic number 44) |
Ru | fundamental chemical element | ||
| FVH: new (2007-OCT-25) | ||||
| rutherfordium (rutherfordium) | ||||
|
rutherfordium (atomic number 104) |
Rf | fundamental chemical element | ||
| FVH: new (2007-OCT-25) | ||||
| RV Tauri star (RvTauriStar) | ||||
|
RV Tauri star |
emission line star
, irregular variable star , late-type supergiant , long period variable star , pulsating variable star , semi-regular variable star |
S Vulpeculae star
, radial pulsation |
||
| 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 |
| RW Aurigae star (RwAurigaeStar) | ||||
|
RW Aurigae star |
emission line star
, irregular variable star , pre-main sequence star , ultraviolet excess star |
H alpha emission line star
, T association , T Tauri star |
||