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 |
---|---|---|---|---|
damping constant (dampingConstant) | ||||
damping constant |
line formation
, radiation damping , radiative braking |
|||
Danjon astrolabe (DanjonAstrolabe) | ||||
Danjon astrolabe |
astrolabe | |||
dark adaption (darkAdaption) | ||||
dark adaption |
retinal adaption |
color vision
, darkness , night vision , vision |
||
dark cloud (darkCloud) | ||||
dark cloud |
interstellar matter | C II region | ||
dark-current calibration (darkCurrentCalibration) | ||||
dark-current calibration |
calibration | CCD detector | ||
FVH: new (2007-OCT-3) | ||||
Dark Energy (DarkEnergy) | ||||
Dark Energy |
dark energy |
Dark Matter
, Hubble law , cold Dark Matter , cosmological constant , cosmology , early universe , galaxy count , galaxy distribution , general theory of relativity , redshift distance relation , redshift magnitude relation , space-time curvature , universe |
||
FVH: new (2007-SEP-21) | ||||
Dark Matter (DarkMatter) | ||||
Dark Matter |
intergalactic matter
, interstellar matter |
baryonic Dark Matter
, cold Dark Matter |
Dark Energy
, Galactic rotation , cosmology , elementary particle , galaxy rotation curve , mass distribution |
|
dark nebula (darkNebula) | ||||
dark nebula |
absorption nebula |
interstellar matter
, nebula |
Bok globule
, cometary globule |
Wolf diagram
, globule , star formation |
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 |
darkness (darkness) | ||||
darkness |
dark adaption
, diurnal variation , electromagnetic radiation , optical property , visible radiation |
|||
darkroom (darkroom) | ||||
darkroom |
photographic processing
, photography |
|||
darmtadtium (darmtadtium) | ||||
darmtadtium (atomic number 110) |
Ds | fundamental chemical element | ||
FVH: new (2007-OCT-25) | ||||
DA star (DaStar) | ||||
DA white dwarf star |
white dwarf |
DB star
, DO star |
||
FVH: modified from original DA_star (2007-OCT-1) | ||||
data acquisition (dataAcquisition) | ||||
data acquisition |
counter
, counting , data analysis , digital recorder , observation , observing technique |
|||
data analysis (dataAnalysis) | ||||
data analysis |
analysis | error analysis |
data acquisition
, data processing , data reduction , data storage , determination |
|
database (database) | ||||
database |
data base | computing |
data center
, data retrieval , data storage , virtual observatory |
|
data center (dataCenter) | ||||
data center |
computer
, data processing , data reduction , data retrieval , data storage , database , on-line system , virtual observatory |
|||
data processing (dataProcessing) | ||||
data processing |
computing |
Monte Carlo technique
, data reduction , numerical analysis |
auto-correlation
, clean method , computer program , computer , cross-correlation , data analysis , data center , data retrieval , data storage , error analysis , observing technique , on-line system , reduction method |
|
data reduction (dataReduction) | ||||
data reduction |
data processing |
computer
, data analysis , data center , data retrieval , data storage , error analysis , fine analysis , reduction method |
||
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 |
data retrieval (dataRetrieval) | ||||
data retrieval |
computing |
data center
, data processing , data reduction , data storage , database , virtual observatory |
||
data storage (dataStorage) | ||||
data storage |
computing |
RAID array
, analog recorder |
computer
, data analysis , data center , data processing , data reduction , data retrieval , database |
|
DB star (DbStar) | ||||
DB white dwarf star |
helium-rich star
, white dwarf |
DA star
, DO star |
||
FVH: new (2007-OCT-1) | ||||
DDO photometry (DdoPhotometry) | ||||
DDO photometry |
medium band photometry
, photometric system |
|||
dead-time calibration (deadTimeCalibration) | ||||
dead-time calibration |
calibration | |||
FVH: new (2007-OCT-3) | ||||
decay oscillation (decayOscillation) | ||||
decay of oscillation |
amplitude
, oscillation , radiation damping |
|||
deceleration (deceleration) | ||||
deceleration |
acceleration
, deceleration parameter |
|||
deceleration parameter (decelerationParameter) | ||||
deceleration parameter |
q-parameter | cosmological parameter |
cosmological distance scale
, deceleration |
|
Declination (Declination) | ||||
Declination |
celestial latitude |
latitude
, equatorial coordinate system |
Right Ascension
, celestial equator , equator , equatorial zone |
|
deconvolution (deconvolution) | ||||
deconvolution |
||||
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 |
defect (defect) | ||||
defect |
||||
combine with other terms | ||||
deformation (deformation) | ||||
deformation |
||||
combine with other terms | ||||
degenerate dwarf (degenerateDwarf) | ||||
degenerate dwarf star |
degenerate star | white dwarf | ||
degenerate matter (degenerateMatter) | ||||
degenerate matter |
matter |
black hole
, degenerate star |
||
degenerate star (degenerateStar) | ||||
degenerate star |
degenerate matter
, subluminous star |
degenerate dwarf
, neutron star , pulsar |
collapsed star
, mass-radius relation |
|
delta delphini star (deltaDelphiniStar) | ||||
delta Delphini star |
delta Scuti star
, pulsating variable star |
|||
delta Scuti star (deltaScutiStar) | ||||
delta Scuti star |
AI Velorum star |
multi-periodic variable star
, pulsating variable star , short period variable star |
delta delphini star |
He II ionization zone
, dwarf Cepheid , kappa mechanism , non-radial pulsation , radial pulsation |
dense cloud (denseCloud) | ||||
dense cloud |
interstellar matter
, nebula |
|||
densitometer (densitometer) | ||||
densitometer |
measuring instrument |
densitometry
, microdensitometer |
||
densitometry (densitometry) | ||||
densitometry |
densitometer | |||
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 |
density bounded (densityBounded) | ||||
density bounded |
density | |||
density (density) | ||||
density |
specific gravity |
atmospheric density
, electron density , energy density , gas density , mass density |
Rankine-Hugoniot relation
, density bounded , density distribution , density fluctuation , density perturbation , density variation , density wave model |
|
density distribution (densityDistribution) | ||||
density distribution |
density | |||
density fluctuation (densityFluctuation) | ||||
density fluctuation |
density | |||
density perturbation (densityPerturbation) | ||||
density perturbation |
density | |||
density variation (densityVariation) | ||||
density variation |
density | |||
density wave model (densityWaveModel) | ||||
density wave model |
density | |||
descending node (descendingNode) | ||||
descending node |
node | |||
FVH: moved NODES to BT (2007-OCT-1) | ||||
design (design) | ||||
design |
engineering | research | ||
combine with other terms | ||||
de Sitter universe (deSitterUniverse) | ||||
de Sitter universe |
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 |
destruction (destruction) | ||||
destruction |
||||
combine with other terms | ||||
detached binary star (detachedBinaryStar) | ||||
detached binary star |
binary star | W Ursae Majoris star | semi-detached binary star | |
detection (detection) | ||||
detection |
signal detection | |||
combine with other terms | ||||
detector array (detectorArray) | ||||
detector array |
array | array processor | ||
detector (detector) | ||||
detector |
instrument |
X-ray detector
, dust detector , infrared detector , multi-channel detector , photographic emulsion , photomultiplier tube , radiometer , superconducting tunnel junction , synchronous detector , two-dimensional detector , ultraviolet detector |
charge-coupled device
, charge-injection device , charge-transfer device , limiting magnitude , pixel , quantum efficiency , receiver , remote sensing , semiconductor device , sensitivity , shot noise , shutter , signal detection , telescope instrument |
|
FVH: added NT SUPERCONDUCTING_TUNNEL_JUNCTION (2007-SEP-21) | ||||
only the broad classes are shown below; specific type will be found under these, or from the hierarchical list | ||||
determination (determination) | ||||
determination |
data analysis
, measurement , quantization |
|||
deuterium (deuterium) | ||||
deuterium, an isotope of hydrogen |
hydrogen | isotope | ||
D galaxy (DGalaxy) | ||||
rotationally symmetric elliptical galaxy (Yerkes classification scheme) |
elliptical galaxy
, galaxy |
cD galaxy |
Yerkes classification
, massive galaxy |
|
diagram (diagram) | ||||
diagram |
||||
combine with other terms | ||||
diameter (diameter) | ||||
diameter |
dimension |
angular diameter
, isophotal diameter |
Baade-Wesselink method
, occultation , surface gravity |
|
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 |
diamond ring effect (diamondRingEffect) | ||||
diamond ring effect |
Sun
, bailys bead , solar eclipse |
|||
dichroic mirror (dichroicMirror) | ||||
dichroic mirror |
mirror |
optical film
, optical filter |
||
Dicke radiometer (DickeRadiometer) | ||||
Dicke radiometer |
radiometer | |||
differential equation (differentialEquation) | ||||
differential equation |
mathematical analysis | |||
differential image motion monitor (differentialImageMotionMonitor) | ||||
differential image-motion monitor |
DIMM | seeing monitor | ||
FVH: new (2007-SEP-21) | ||||
differential rotation (differentialRotation) | ||||
differential rotation |
rotation |
Galactic rotation
, galaxy , galaxy rotation curve , globular star cluster , tidal disruption , tidal distortion |
||
FVH: added RT Galactic_rotation, RT galaxy_rotation_curve (2007-OCT-5) | ||||
diffraction (diffraction) | ||||
diffraction |
X-ray diffraction |
Airy disk
, Rayleigh criterion , diffraction patterns , interference wave , shadow band |
||
diffraction grating (diffractionGrating) | ||||
diffraction grating |
grating | optical component |
VPH grating
, echelle grating , objective grating , reflection grating , transmission grating |
grating spectrograph
, grism , spectrum , spectrograph |
diffraction patterns (diffractionPatterns) | ||||
diffraction patterns |
diffraction | |||
diffuse nebula (diffuseNebula) | ||||
diffuse 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 |
diffuse radiation (diffuseRadiation) | ||||
diffuse radiation |
||||
combine with other terms | ||||
diffusion (diffusion) | ||||
diffusion |
||||
combine with other terms | ||||
digital image (digitalImage) | ||||
digital image |
image | |||
digital recorder (digitalRecorder) | ||||
digital recorder |
data acquisition | |||
dimension (dimension) | ||||
dimension |
diameter | |||
combine with other terms | ||||
diode array (diodeArray) | ||||
diode array |
array
, multi-channel detector |
reticon array | ||
diode (diode) | ||||
diode |
electronic equipment | |||
dioptric system (dioptricSystem) | ||||
dioptric system |
optical system |
lens
, optical telescope |
||
dipole antenna (dipoleAntenna) | ||||
dipole antenna |
dipole antennas |
antenna
, directional antenna |
dipole | |
dipole (dipole) | ||||
dipole |
half-wave dipole |
dipole antenna
, electric charge , electric dipole |
||
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 |
dirac cosmology (diracCosmology) | ||||
Dirac cosmology |
cosmology | |||
directional antenna (directionalAntenna) | ||||
directional antenna |
directional antennas | antenna |
Mills cross antenna
, Yagi antenna , dipole antenna , parabolic antenna |
|
dirty snowball theory (dirtySnowballTheory) | ||||
dirty snowball theory |
comet
, nucleus celestial object |
|||
discoloration (discoloration) | ||||
discoloration |
||||
combine with other terms | ||||
discoveries (discoveries) | ||||
discoveries |
research
, space exploration |
|||
combine with other terms | ||||
discrete radio source (discreteRadioSource) | ||||
discrete radio source |
radio source | |||
dish antenna (dishAntenna) | ||||
dish antenna |
dish antennas | radio telescope |
antenna
, parabolic reflector , radar telescope |
|
disintegration (disintegration) | ||||
disintegration |
||||
combine with other terms | ||||
disk (disk) | ||||
discs UK disk |
accretion disk
, circumstellar disk , gaseous disk , gravitating disk |
disk flaring
, disk galaxy , disk population , disk star |
||
disk flaring (diskFlaring) | ||||
disc flaring UK disk flaring |
disk
, morphology |
|||
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 |
disk galaxy (diskGalaxy) | ||||
disc galaxy UK disk galaxy |
galaxy |
lenticular galaxy
, spiral galaxy |
disk
, mass distribution |
|
disk population (diskPopulation) | ||||
disc population UK disk population |
population II star |
Galactic plane
, disk , stellar population |
||
disk star (diskStar) | ||||
disc star UK disk star |
population II star |
Galactic plane
, disk , gaseous disk |
||
dispersion (dispersion) | ||||
dispersion |
||||
combine with other terms | ||||
disruption (disruption) | ||||
disruption |
||||
combine with other terms | ||||
dissipation (dissipation) | ||||
dissipation |
||||
combine with other terms | ||||
distance (distance) | ||||
distance |
Bodes law
, absolute magnitude , distance indicator , distance measurement , distance modulus , distance scale , light year , parallax , parsec , range finder , trigonometric parallax |
|||
distance indicator (distanceIndicator) | ||||
distance indicator |
distance
, distance measurement , distance modulus , distance scale |
|||
distance measurement (distanceMeasurement) | ||||
distance measurement |
Cepheid distance
, Faber-Jackson distance , RGB tip distance , SBF distance |
distance
, distance indicator , distance scale |
||
distance modulus (distanceModulus) | ||||
distance modulus |
modulus |
absolute magnitude
, distance , distance indicator , distance scale , parallax |
||
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 |
distance scale (distanceScale) | ||||
distance scale |
cosmological distance scale |
Astronomical Unit
, distance , distance indicator , distance measurement , distance modulus , parsec |
||
distortion (distortion) | ||||
distortion |
optical aberration |
astigmatism
, chromatic aberration , comatic aberration , field curvature , optical system , spherical aberration |
||
distribution function (distributionFunction) | ||||
distribution function |
function |
distribution in space
, frequency distribution , statistics |
||
in mathematics | ||||
distribution in space (distributionInSpace) | ||||
distribution in space |
distribution function | |||
combine with other terms | ||||
diurnal parallax (diurnalParallax) | ||||
diurnal parallax |
parallax | horizontal parallax | zenith distance | |
diurnal phenomena (diurnalPhenomena) | ||||
diurnal phenomena |
diurnal variation | |||
diurnal variation (diurnalVariation) | ||||
diurnal variation |
darkness
, diurnal phenomena |
|||
D layer (DLayer) | ||||
D layer |
D region |
Earth atmosphere
, ionosphere |
||
D line (DLine) | ||||
D line |
spectral line | absorption spectrum | ||
dome (dome) | ||||
dome |
telescope dome |
dome seeing
, observatory , telescope , temperature control , ventilation |
||
excluding lunar dome | ||||
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 |
dome seeing (domeSeeing) | ||||
dome seeing |
seeing |
dome
, ventilation |
||
Doppler broadening (DopplerBroadening) | ||||
Doppler broadening |
line broadening |
Doppler effect
, Stark broadening , Zeeman splitting , line width , natural line width , pressure broadening |
||
Doppler effect (DopplerEffect) | ||||
Doppler effect |
blueshift
, redshift |
Doppler broadening
, line shift , radar , radial velocity , spectroscopic analysis , spectroscopic binary star , stellar motion |
||
DO star (DoStar) | ||||
DO white dwarf star |
white dwarf | PG1159 star |
DA star
, DB star |
|
FVH: new (2007-OCT-9) | ||||
double galaxy (doubleGalaxy) | ||||
double galaxy |
binary galaxy |
binary system
, galaxy |
companion galaxy
, galaxy merger |
|
double-mode Cepheid (doubleModeCepheid) | ||||
double-mode Cepheid |
beat_Cepheid
, double mode Cepheid |
Cepheid
, double-mode variable star , pulsating variable star |
double-mode pulsation | |
double-mode pulsation (doubleModePulsation) | ||||
double-mode pulsation |
double mode pulsation | multi-periodic pulsation |
double-mode Cepheid
, double-mode variable star , pulsating variable star |
|
double-mode variable star (doubleModeVariableStar) | ||||
double-mode variable star |
double mode variable star |
multi-periodic variable star
, pulsating variable star |
RR Lyrae star
, double-mode Cepheid |
double-mode pulsation |
double quasar (doubleQuasar) | ||||
double quasar |
gravitationally lensed source |
gravitational deflection
, gravitational lensing , quasar |
||
DQ Herculis star (DqHerculisStar) | ||||
DQ Herculis star |
eclipsing binary star
, 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 |
dredge up (dredgeUp) | ||||
dredge up |
convection
, giant , metal abundance , stellar atmosphere , stellar interior |
|||
drift scan (driftScan) | ||||
drift scan |
photometry
, radio structure , surface photometry |
|||
drift wave (driftWave) | ||||
drift wave |
wave | |||
drive (drive) | ||||
drive |
coelostat
, control system , siderostat , telescope |
|||
dubnium (dubnium) | ||||
dubnium (atomic number 105) |
Db | fundamental chemical element | ||
FVH: new (2007-OCT-25) | ||||
dust cloud (dustCloud) | ||||
dust cloud |
cloud
, interstellar matter |
dust
, interstellar dust |
||
dust detector (dustDetector) | ||||
dust detector |
detector | dust | ||
dust (dust) | ||||
dust |
cosmic dust |
intergalactic matter
, interstellar matter |
interplanetary dust
, interstellar dust , zodiacal dust |
comet
, dust cloud , dust detector , dust grain , dust nebula , dust shell , dust storm , gas to dust ratio |
dust grain (dustGrain) | ||||
dust grain |
interstellar matter |
adsorption
, dust |
||
dust nebula (dustNebula) | ||||
dust nebula |
interstellar matter
, nebula |
dust | ||
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 |
dust shell (dustShell) | ||||
dust shell |
circumstellar shell
, shell |
circumstellar dust
, dust , symbiotic star |
||
dust storm (dustStorm) | ||||
dust storm |
dust
, planet , surface of celestial body |
|||
dwarf Cepheid (dwarfCepheid) | ||||
dwarf Cepheid |
irregular variable star
, multi-periodic variable star , pulsating variable star |
Cepheid
, delta Scuti star |
||
dwarf (dwarf) | ||||
dwarf star |
main sequence star |
A dwarf
, B dwarf , F dwarf , G dwarf , K dwarf , M dwarf , O dwarf , black dwarf , flare star , late-type dwarf , nearby dwarf |
brown dwarf
, low-luminosity star , low-mass star , luminosity classification , main sequence , subdwarf |
|
the term alone refers to main sequence star, but subterms may refer to evolved star | ||||
dwarf galaxy (dwarfGalaxy) | ||||
dwarf galaxy |
galaxy
, peculiar galaxy |
|||
dwarf nova (dwarfNova) | ||||
dwarf nova |
DN |
cataclysmic variable star
, eruptive binary star |
SU Ursae Majoris star
, SX Arietis star , U Geminorum star , WZ Sagittae star , Z Camelopardalis star |
AM Canum Venaticorum star
, UV Persei star , UX Ursae Majoris star , X-ray binary star , accretion disk , emission line star |
FVH: total update (2007-SEP-24) | ||||
dwarf planet (dwarfPlanet) | ||||
dwarf planet |
rotating body |
Ceres
, Pluto |
planet | |
dynamical evolution (dynamicalEvolution) | ||||
dynamical evolution |
evolution | |||
dynamical friction (dynamicalFriction) | ||||
dynamical friction |
friction | radiative braking | ||
dynamical parallax (dynamicalParallax) | ||||
dynamical parallax |
parallax |
binary star
, kinematic parallax , moving cluster parallax |
||
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 |
dynamical time (dynamicalTime) | ||||
dynamical time |
time | |||
dynamics (dynamics) | ||||
dynamics |
||||
combine with other terms | ||||
dynamo theory (dynamoTheory) | ||||
dynamo theory |
magnetic field | |||
dysprosium (dysprosium) | ||||
dysprosium (atomic number 66) |
Dy |
fundamental chemical element
, rare earth |
||
FVH: new (2007-OCT-25) | ||||