| Label | Description | UCD1+ or SV Equivalents | Aliases |
|---|---|---|---|
| cosmology | Having to do with the large-scale properties of the universe | ucd:phys.cosmology | |
| cosmology.cosmicBackground | Cosmic background | ||
| cosmology.DarkEnergy | Dark Energy | ||
| cosmology.DarkMatter | Dark matter | ||
| cosmology.earlyUniverse | Having to do with the state of the early universe | ||
| cosmology.largeScaleStructure | Large-scale structure of the universe | ||
| cosmology.parameter | Generic cosmological parameter | ||
| cosmology.parameter.H0 | Hubble's constant (current) | ||
| cosmology.parameter.lambda | Einstein's lambda parameter | ||
| cosmology.parameter.omega | Cosmological energy/mass fraction parameter | ||
| device | Having to do with astronomical devices, instruments, and methods | ucd:instr | |
| device.adaptiveOptics | Technology used on astronomical telescopes to remove the effects of atmospheric distortion | ||
| device.amplifier | Generic amplifier | ||
| device.antenna | Antenna for radio reception | ||
| device.autoguider | Telescope autoguider | ||
| device.balloon | Device to transport instruments in the upper atmosphere | ||
| device.cloudMonitor | Camera for monitoring clouds | ||
| device.delayLine | Delay line (e.g. in an interferometer) | ||
| device.detector | Generic detector of electromagnetic radiation or particles | ucd:instr.det | |
| device.detector.bolometer | Generic bolometer | ||
| device.detector.photomultiplier | Photomultiplier detector | PMT | |
| device.detector.CCD | CCD detector | CCD | |
| device.detector.CMOS | CMOS detector | CMOS | |
| device.detector.dark-current | Thermal dark current of detector | ||
| device.detector.film | Photographic film or plate | ucd:instr.plate.emulsion | |
| device.detector.noise | Total noise of detector | ucd:instr.det.noise | |
| device.detector.PSPC | Position-sensitive proportional counter | PSPC | |
| device.detector.read-outNoise | Read-out noise of detector | RON | |
| device.detector.STJ | Superconducting Tunnel Junction detector | ||
| device.detector.quantumEfficiency | Quantum efficiency | ucd:instr.det.qe | QE |
| device.computer | Computer | ||
| device.computer.microprocessor | Very small computer | ||
| device.computer.parallel | Parallel computer | ||
| device.dichroic | Dichroic window/mirror | ||
| device.DIMM | Differential Image Motion Monitor (for seeing) | DIMM | |
| device.etalon | Fabry-Perot etalon | FP | |
| device.eyepiece | Eyepiece | ||
| device.filter | Generic filter for electromagnetic radiaion | ucd:instr.filter | |
| device.filter.narrow-band | Generic narrow-band filter | ||
| device.filter.neutral-density | Neutral-density filter | ||
| device.filter.Bessel | Bessel filter system | ||
| device.filter.Bessel.# | Bessel filter # (U,B,V,R,I) | ||
| device.filter.Cousins | Cousins filter system | ||
| device.filter.Cousins.# | Cousins filter # (V,R,I) | ||
| device.filter.Geneva | Geneva filter system | ||
| device.filter.Geneva.# | Geneva filter # (U,B,B1,B2,V,V1,G) | ||
| device.filter.Gunn | Gunn filter system | ||
| device.filter.Gunn.# | Gunn filter # (g,r,i,z) | ||
| device.filter.HST | HST filter system | ||
| device.filter.HST.# | HST filter # (Fnnn[LMNW]) | ||
| device.filter.Kron | Kron filter system | ||
| device.filter.Kron.# | Kron filter # (R,I) | ||
| device.filter.Johnson | Johnson filter system | ||
| device.filter.Johnson.# | Johnson filter # (U,B,V,R,I,J,H,K,L,M,N) | ||
| device.filter.rgb | Generic red-green-blue filter system | ||
| device.filter.rgb.red | Red filter | ||
| device.filter.rgb.green | Green filter | ||
| device.filter.rgb.blue | Blue filter | ||
| device.filter.Sloan | Sloan filter system | ||
| device.filter.Sloan.# | Sloan filter # (u,g,r,i,z) | ||
| device.filter.Stroemgren | Stroemgren filter system | ||
| device.filter.Stroemgren.# | Stroemgren filter # (u,b,v,y,beta) | ||
| device.filter.Vilnius | Vilnius filter system | ||
| device.filter.Vilnius.# | Vilnius filter # (U,P,X,Y,Z,V,T,S) | ||
| device.filter.Walraven | Walraven filter system | ||
| device.filter.Walraven.# | Walraven filter # (V,B,L,U,W) | ||
| device.filterwheel | Filterwheel | ||
| device.grating | Grating | ||
| device.grating.echelle | Echelle grating | ||
| device.grating.VPH | VPH grating | ||
| device.grism | Grism=Grating+Prism | ||
| device.imager | Generic imaging instrument | camera | |
| device.imager.coronograph | Imaging instrument with a coronographic mask | ||
| device.imager.wide-field | Wide-field imaging instrument | ||
| device.instrument | Generic (astro)physical instrument | ucd:instr | |
| device.interferometer | Interferometer | ||
| device.lamp | Lamp | ||
| device.lamp.flat-field | Flat-field lamp | ||
| device.lamp.comparison | Lamp for wavelength calibration | ||
| device.lens | Refractive lens | ||
| device.mask | Optical mask | ||
| device.microChannelPlate | Microchannel plate amplifier | MCP | |
| device.mirror | Reflective mirror | ||
| device.mirror.primary | Primary mirror | ||
| device.mirror.secondary | Secondary mirror | ||
| device.mirror.tertiary | Tertiary mirror | ||
| device.mixer | Mixer (e.g. radio) | ||
| device.photocathode | Photocathode amplifier | ||
| device.photometer | Generic photometer | ||
| device.plate | Optical window | ||
| device.plate.half-wave | 1/2 wave plate | ||
| device.plate.quarter-wave | 1/4 wave plate | ||
| device.polarimeter | Polarimeter | ||
| device.prism | Prism | ||
| device.rocket | Rocket (e.g. sounding) | ||
| device.sensor | Generic sensing device | ||
| device.sensor.anemometer | anemometer (wind speed) | ||
| device.sensor.barometer | barometer (pressure) | ||
| device.sensor.dust | dust sensor | ||
| device.sensor.hygrometer | hygrometer (humidity) | ||
| device.sensor.precipitation | rain/snow sensor | ||
| device.sensor.thermometer | thermometer (temperature) | ||
| device.sensor.windVane | wind vane (wind direction) | ||
| device.shutter | Shutter | ||
| device.slit | Slit | ||
| device.spacecraft | Generic man-made device sent to space | ||
| device.spectrograph | Generic spectrograph | ||
| device.spectrograph.coude | Coude spectrograph | ||
| device.spectrograph.echelle | Echelle spectrograph | ||
| device.spectrograph.imaging | Imaging spectrograph | ||
| device.spectrograph.integral-field | Integral-field spectrograph | ||
| device.spectrograph.multi-fiber | Multi-fiber spectrograph | ||
| device.spectrograph.multi-slit | Multi-slit spectrograph | ||
| device.spectrograph.OH-suppression | Spectrograph with OH-suppression | ||
| device.spectrograph.polarimeter | Spectropolarimeter | ||
| device.switch | Generic switch | ||
| device.telescope | Generic telescope | ucd:instr.tel | |
| device.telescope.refractor | Refracting telescope | ||
| device.telescope.reflector | Mirror telescope | ||
| device.weatherStation | Weather station | ||
| device.webcam | Internet camera | ||
| diffuse | Having to do with diffuse interstellar, interplanetary or intergalactic media | ||
| diffuse.cosmicRays | Extraterrestrial cosmic rays | ||
| diffuse.nebula | Generic diffuse cloud or nebula | cloud | |
| diffuse.nebula.bright | Nebula visible by its own emission | ||
| diffuse.nebula.dark | Nebula visible by its obscuration against a background | ||
| diffuse.nebula.globule | Small, less diffuse cloud; Bok globule | ||
| diffuse.nebula.globule.cometary | Cometary globule | ||
| diffuse.nebula.HI | Neutral hydrogen cloud | ||
| diffuse.nebula.HII | Ionized hydrogen cloud | HII-region | |
| diffuse.nebula.molecular | Molecular cloud | ||
| diffuse.nebula.molecular.giant | Giant molecular cloud | GMC | |
| diffuse.nebula.planetary | Planetary nebula | PN | |
| diffuse.nebula.proto-planetary | A proto-planetary cloud or disk (not a proto-PN!) | proplyd | |
| diffuse.nebula.Herbig-Haro-class | Herbig-Haro nebula | HH-Object | |
| diffuse.nebula.high-velocity | High-velocity cloud | HVC | |
| diffuse.nebula.reflection | Nebula visible from the reflected light of another object | ||
| diffuse.remnant | Remnant from an explosion or eruption | ||
| galaxy | Having to do with galaxies | ||
| galaxy.AGN | galaxy with an active nucleus | AGN | |
| galaxy.AGN.blazar | Highly variable active galaxy | blazar | |
| galaxy.AGN.BLLac-class | Galaxy of type BL Lac | ||
| galaxy.AGN.quasar | Quasar-type active galaxy | QSO | |
| galaxy.AGN.LINER | Weakly active galaxy | LINER | |
| galaxy.blackHole | Non-stellar Black Hole in a galaxy | ||
| galaxy.bulge | Bulge of a galaxy | ||
| galaxy.cluster | Galaxy cluster | ||
| galaxy.compact | Compact galaxy | ||
| galaxy.dwarf | Dwarf galaxy | ||
| galaxy.elliptical | Elliptical or lenticular galaxy | ||
| galaxy.elliptical.E# | Elliptical galaxy of type # (E*) | E# | |
| galaxy.elliptical.giant | Giant elliptical galaxy | cD | |
| galaxy.giant | Unusually large galaxy | ||
| galaxy.group | Group of galaxies | ||
| galaxy.group.compact | Compact group of galaxies | ||
| galaxy.irregular | Irregular galaxy | ||
| galaxy.lenticular | Lenticular galaxy | S0 | |
| galaxy.peculiar | Peculiar galaxy | ||
| galaxy.Seyfert-class | Seyfert galaxy | ||
| galaxy.Seyfert-class.# | Seyfert galaxy of type # | ||
| galaxy.spiral | Spiral galaxy | SA | |
| galaxy.spiral.SA# | Spiral galaxy of type # (SA#) | SA# | |
| galaxy.spiral.barred | Barred spiral galaxy | SB | |
| galaxy.spiral.barred.SB# | Barred spiral galaxy of type # | SB# | |
| galaxy.spiral.intermediate | Weakly barred spiral galaxy | SAB | |
| galaxy.sprial.intermediate.SAB# | Weakly barred sprial galaxy of type # | SAB# | |
| galaxy.supercluster | Super-cluster of galaxies | ||
| galaxy.ultraLuminous | Unusually luminous galaxy | ||
| location | Having to do with (cosmic) location | ||
| location.line-of-sight | Being along a single line-of-sight with an observer | ||
| location.line-of-sight.front | Being along a single line-of-sight with an observer but in front of another object | ||
| location.line-of-sight.back | Being along a single line-of-sight with an observer but in back of another object | ||
| location.barycentric | Located at the center-of-mass | ||
| location.between | Spatially localized between other objects or regions | ||
| location.circumbinary | Around a binary or multiple star system | ||
| location.circumgalactic | Around a galaxy | ||
| location.circumstellar | Around a star | ||
| location.extragalactic | Outside of the Milky Way | ||
| location.extrasolar | Outside of the Solar System | ||
| location.extraterrestrial | Outside of the Earth | ||
| location.intergalactic | Between galaxies | ||
| location.interplanetary | within a planetary system | ||
| location.interstellar | Between stars | ||
| location.intracluster | Within a cluster | ||
| location.galactic | Within a galaxy | ||
| location.neighborhood | Region close to but still beyond an object | ||
| math | Having to do with mathematical concepts. | ||
| math.angle | The figure formed by two lines sharing a common endpoint | ||
| math.area | Quantity expressing the size of a surface | ucd:phys.area | |
| math.covariance | The measure of how much two random variables vary together | ||
| math.derivative | The rate of change of a function when the values of its inputs change | ||
| math.dimension | |||
| math.distribution | |||
| math.distribution.chi-square | Theoretical probability distribution in statistical significance tests | ucd:stat.fit.chi2 | |
| math.distribution.cumulative | Function describing the probability distribution of a real-valued random variable | ||
| math.distribution.normal | Gaussian continuous probability distribution | ||
| math.distribution.Poisson-type | Poissonian probability distribution | ||
| math.equation | |||
| math.equation.integral | |||
| math.equation.differential | Differential equation | ||
| math.equation.differential.partial | Type of differential equation involving partial derivatives | ||
| math.equation.root | |||
| math.extrapolation | |||
| math.function | Mathematical function; the # form is used for commonly recognizable functions like sin, cos, abs, etc. | ||
| math.function.Gaussian | |||
| math.function.polynomial | |||
| math.function.polynomial.Chebyshev-type | |||
| math.function.polynomial.Laguerre-type | |||
| math.function.sphericalHarmonic | |||
| math.function.rational | |||
| math.gradient | |||
| math.integral | |||
| math.integral.elliptic | |||
| math.integral.integrand | |||
| math.interpolation | |||
| math.interpolation.cubicSpline | |||
| math.interpolation.linear | |||
| math.interpolation.polynomial | |||
| math.interpolation.sinc | |||
| math.line | |||
| math.matrix | |||
| math.matrix.eigenvalue | |||
| math.matrix.eigenvector | |||
| math.matrix.determinant | |||
| math.matrix.Hermitian | |||
| math.matrix.Hessenberg-type | |||
| math.matrix.inverse | |||
| math.matrix.singularValueDecomposition | |||
| math.matrix.Toeplitz-type | |||
| math.matrix.tri-diagonal | |||
| math.matrix.Vandermonde-type | |||
| math.number | |||
| math.number.fraction | |||
| math.number.fraction.numerator | |||
| math.number.fraction.denominator | |||
| math.number.integer | |||
| math.number.random | |||
| math.number.real | |||
| math.plane | |||
| math.point | |||
| math.pole | |||
| math.order | |||
| math.series | |||
| math.series.Chebyshev-type | |||
| math.series.Taylor-type | |||
| math.surface | |||
| math.tensor | |||
| math.polygon | |||
| math.polygon.rectangle | |||
| math.polygon.triangle | |||
| math.polygon.triangle.spherical | |||
| math.transform | |||
| math.transform.Fourier-type | |||
| math.transform.Fourier-type.fast | FFT | ||
| math.vector | |||
| math.volume | |||
| method | Having to do with astronomically relevant methods, analyses, etc. | ||
| method.analysis | Having to do with the analysis / processing of data | ||
| method.analysis.graph | Graphical display of data, e.g. a 2-dimensional plot of one quantity versus another | ||
| method.analytical | Having to do with analytical calculation | ||
| method.calibration | Having to do with astronomical calibration | ||
| method.calibration.alignment | Alignment calibration | ||
| method.calibration.bias | Bias calibration | ||
| method.calibration.centering | Centering calibration | ||
| method.calibration.dark-current | Dark-current calibration | ||
| method.calibration.deadTime | Dead-time calibration | ||
| method.calibration.flatfield | Flatfield calibration | ||
| method.calibration.flux | Flux calibration | ||
| method.calibration.focus | Focus calibration | ||
| method.calibration.frequency | Frequency calibration | ||
| method.calibration.fringing | Calibration of unwanted fringes | ||
| method.calibration.linearity | Calibration of linear response | ||
| method.calibration.phase | Calibration of phase | ||
| method.calibration.position | Position calibration | ||
| method.calibration.positionAngle | Position angle calibration | ||
| method.calibration.tracking | Calibration of tracking performance | ||
| method.calibration.transmission | Calibration of throughput | ||
| method.calibration.wavelength | Wavelength calibration | ||
| method.laboratory | Having to do with laboratory methods/techniques | ||
| method.numerical | Having to do with numerical calculations on a computer | ||
| method.numerical.SPH | Single Particle Hydrodynamics | SPH | |
| method.radar | Measurement made by reflecting a signal off an object | ||
| method.simulation | Having to do with the simulation of a physical process | ||
| method.simulation.MonteCarlo-type | Simulation via a large number of events having the right statistical properties | ||
| method.simulation.N-body | Simulation using a large number of similar objects | ||
| method.seismology | Study of the internal structure of an object by the interpretation of its frequency spectra | ||
| method.survey | Investigation of a large number of objects | ||
| method.theory | Having to do with theoretical interpretation of phenomena | ||
| misc | A random collection of standard definitions, aliases, and acronyms of potentially wide interest (place true names under "named") | ||
| misc.astrobiology | The study of life in space, combining aspects of astronomy, biology and geology | ||
| misc.astrochemistry | The study of the chemical elements found in outer space | ||
| misc.CMB | Cosmic microwave background | cosmology.cosmicBackground;ucd:em.radio | CMB |
| misc.CME | Coronal mass ejection | physics.magneticField;process.mass-loss.ejection;process.corona | CME |
| misc.GRB | Gamma-ray burst | time.variation.burst;ucd:em.gamma | GRB |
| misc.HJD | Heliocentric Julian Date | time.Julian.date;location;named.Sun | HJD |
| misc.BJD | Barycentric Julian Date | time.Julian.date;location.barycentric;named.SolarSystem | BJD |
| misc.ICM | Intracluster medium | diffuse;location.intracluster | ICM |
| misc.IGM | Intergalactic medium | diffuse;location.intergalactic | IGM |
| misc.ISM | Interstellar medium | diffuse;location.interstellar | ISM |
| misc.MACHO | MAssive Compact Halo Object | star;isElementOf;[;galaxy;morphology.halo;] | MACHO |
| misc.MHD | Magnetohydrodynamics | physics.magneticField;physics.hydrodynamics | MHD |
| misc.SNR | Supernova remnant | diffuse.remnant;star.supernova | SNR |
| morphology | Generic structure of object/source | ||
| morphology.bar | Elongated centered structure | ||
| morphology.bubble | Diffuse or empty structure with a better defined outer surface/layer/region | ||
| morphology.center | Geometric or property-weighted center of an object | ||
| morphology.column | Tall structure with width << height | ||
| morphology.core | Central, compact, physically distinct part of a larger object | ||
| morphology.disk | Circum-object disk with thickness H <<R and R_in << R_out | disc | |
| morphology.edge | Edge, sharp boundary, terminator | ||
| morphology.exterior | Having to do with the outer part of something | ||
| morphology.filament | Highly elongated structure | ||
| morphology.granulation | Grainy appearence of a surface | ||
| morphology.halo | Outer region of an object with a distinct core or nucleus | coma, envelope | |
| morphology.interior | Having to do with the inner part of something | ||
| morphology.loop | Curved feature in space or extending out from a surface or point | ||
| morphology.nucleus | Generic central part of a larger object | ||
| morphology.ring | Circum-object ring with thickness H << R and R_in ~ R_out | process.belt | |
| morphology.spiral | Radial structure with continously changing position angle | ||
| morphology.spot | Distinct physical region on an object with different properties | ||
| morphology.spot.facula | A bright spot | ||
| morphology.surface | Distinct outer surface of a body | ||
| morphology.tail | A short connected region trailing behind the main body | ||
| morphology.trail | A long connected region trailing behind the main body | ||
| morphology.void | Region of very low density w.r.t. some quantity | ||
| named | Individual objects/concepts with commonly used names | ||
| named.Andromeda | The Andromeda galaxy | named;galaxy | M31 |
| named.Ceres | Ceres | named;planetary.dwarfPlanet | Ceres |
| named.Earth | The Earth | named;planetary.planet | Earth, Gaia |
| named.HubbleSpaceTelescope | The Hubble Space Telescope | named;device.telescope | HST |
| named.Jupiter | The planet Jupiter | named;planetary.planet | Jupiter |
| named.LargeMagellanicCloud | Large Magellanic Cloud | named;galaxy | LMC |
| named.LocalGroup | The Local Group of galaxies near the Milky Way | named;galaxy.group | |
| named.Mars | The planet Mars | named;planetary.planet | Mars |
| named.Mercury | The planet Mercury | named;planetary.planet | Mercury |
| named.Moon | The Earth's Moon | named;planetary.satellite | Moon |
| named.MilkyWay | Our galaxy | named;galaxy | |
| named.Neptune | The planet Neptune | named;planetary.planet | Neptune |
| named.Pluto | Pluto | named;planetary.dwarfPlanet | Pluto |
| named.Saturn | The planet Saturn | named;planetary.planet | Saturn |
| named.SmallMagellanicCloud | Small Magellanic Cloud | named;galaxy | SMC |
| named.SolarSystem | The Solar System around the Sun | named;planetary.system | SolarSystem |
| named.Sun | The Sun | named;star | Sun, Sol |
| named.Uranus | The planet Uranus | named;planetary.planet | Uranus |
| named.Venus | The planet Venus | named;planetary.planet | Venus |
| named.VeryLargeTelescope | The ESO 8-m Very Large Telescopes | named;device.telescope | VLT |
| named.# | Some object/concept with the name # | ||
| optics | Having to do with terms but not devices in geometric optics. | ||
| optics.aperture | Area or diameter of optical element | ||
| optics.beam | Beam of or within an optical train. | ucd:instr.beam | |
| optics.Cassegrain-type | Cassegrain optical systems | ||
| optics.catadioptic | Optical systems using both lenses and mirrors | ||
| optics.catadioptic.Maksutov-type | Maksutov-type optics | ||
| optics.catadioptic.Schmidt-type | Schmidt-type optics | ||
| optics.catadioptic.Schmidt-Cassegrain-type | Schmidt-Cassegrain type optics | ||
| optics.Gregorian | Gregorian optical systems | ||
| optics.field-of-view | Field-of-view of an optical system | ucd:instr.fov | FOV |
| optics.focalLength | Distance between the optical element and the focus | ||
| optics.focal-ratio | Ratio between the diameter and the focal length of an optical element | f-ratio | |
| optics.focus | Focus of an optical system | ||
| optics.focus.prime | Direct/primary focus of an optical system | ||
| optics.Newtonian | Newtonian optical systems | ||
| optics.platescale | Scale of an optical system in units of angle per length | ||
| optics.pointSpreadFunction | Point-spread function of an optical system | ucd:instr.det.psf | PSF |
| optics.order | Order of a dispersing element | ||
| optics.lobe | Angular region of an antenna's heightened sensitivity or power | ||
| optics.lobe.primary | Central angular region of an antenna's heightened sensitivity or power | ||
| optics.lobe.side | Secondary angular region of an antenna's heightened sensitivity or power | ||
| physics | Having to do with fundamental physical processes. | ucd:phys | |
| physics.absorption | Generic absorption of wave or particle | ucd:phys.absorption | |
| physics.abundance | Having to do with the relative amounts of different chemical elements | ucd:phys.abund | |
| physics.acceleration | Acceleration (e.g. of particles) | ucd:phys.acceleration | |
| physics.albedo | Albedo or reflectance | ucd:phys.albedo | |
| physics.atom | Having to do with atoms | ||
| physics.conduction | Conduction | ||
| physics.convection | Convection | ||
| physics.diffusion | Diffusion | ||
| physics.dynamics | Having to do with dynamics | ||
| physics.emission | Generic emission of wave or particle | ||
| physics.excitation | Excitation, jump in a higher energy (bound) state | ucd:phys.atmol.excitation | |
| physics.flux | The energy per time and area received from a source, often per frequency or wavelength interval | ||
| physics.gravity | Having to do with gravity, gravitation | ucd:phys.gravity | |
| physics.gravity.lensing | Generic gravitational lensing | ||
| physics.gravity.microlensing | Spatially non-resolved gravitational lensing | ||
| physics.gravity.shear | Large-scale weak lensing | ||
| physics.gravity.tide | Having to do with effects due to gradients in gravitational fields | ||
| physics.gravity.wave | Gravitational wave | ||
| physics.hydrodynamics | Having to do with hydrodynamics | ||
| physics.kinematics | Having to do with kinematics | ||
| physics.ionization | Having to do with ionization. | ||
| physics.line | The energy/wavelength signature of an atomic/molecular transition (line/band) | ||
| physics.luminosity | The energy output rate of an object (e.g. in Watts), usually bolometric | ||
| physics.magneticField | Having to do with magnetic fields | ucd:phys.magField | |
| physics.matter | Having to do with the physical properites of matter | ||
| physics.matter.dense | Extremely dense form of matter | ||
| physics.matter.gaseous | Mainly composed of neutral gas, not terrestrial | ||
| physics.matter.liquid | Mainly composed of material in a liquid state | ||
| physics.matter.liquid.molten | Mainly composed of material in a hot liquid state | ||
| physics.matter.plasma | Mainly composed of ionized gas | ||
| physics.matter.solid | Mainly composed of solid material | terrestrial | |
| physics.matter.solid.ice | Mainly composed of solid material in a cold solid state | ||
| physics.molecule | Having to do with molecules | ||
| physics.nucleosynthesis | Nuclear reactions, nucleosynthesis | ||
| physics.nutation | Oscillation of a bodie's inclination relative to its rotation axis. | ||
| physics.particle | Generic elementary particle | ||
| physics.particle.alpha | Helium nucleus | ||
| physics.particle.baryon | A sub-atomic particle made up of three quarks (and hence fermion) | ||
| physics.particle.baryon.neutron | A baryon made up of 1x"up" and 2x"down" quarks | ||
| physics.particle.baryon.proton | A baryon made up of 2x"up" and 1x"down" quarks | ||
| physics.particle.boson | Force-carrying fundamental particles with whole-integer spin. | ||
| physics.particle.boson.gluon | Gluon | ||
| physics.particle.boson.graviton | Graviton | ||
| physics.particle.boson.Higgs-type | Higgs boson | ||
| physics.particle.boson.photon | Photon | ||
| physics.particle.fermion | Fundamental particle with half-integer spin. | ||
| physics.particle.fermion.lepton | Fundamental particle with half-integer spin that is not a quark. | ||
| physics.particle.fermion.lepton.electron | Electron particle | ucd:phys.electron | |
| physics.particle.fermion.lepton.positron | Positron particle (positive electron). | ||
| physics.particle.fermion.lepton.muon | Muon particle | ||
| physics.particle.fermion.lepton.neutrino | Neutrino particle | ucd:phys.particle.neutrino | |
| physics.particle.fermion.lepton.tau | Tau particle | ||
| physics.particle.fermion.quark.# | quark particle (up, down, strange, charm, bottom, top) | ||
| physics.particle.wimp | Hypothetical weakly-interacting massive particles, candidates for Dark Matter | ||
| physics.polarization | Having to do with polarization of light | ucd:phys.polarization | |
| physics.polarization.circular | Having to do with circular polarization of light | ucd:phys.polarization.circular | |
| physics.polarization.linear | Having to do with linear polarization of light | ucd:phys.polarization.linear | |
| physics.precession | Slow rotation about a non-aligned axis | ||
| physics.radiation | Having to do with radiation of e.m. waves | ||
| physics.radiation.non-thermal | Radiation mechanisms: non-thermal | ||
| physics.radiation.thermal | Radiation mechanisms: thermal | ||
| physics.recombination | Recombination, from unbound to bound energy state | ||
| physics.relativity | Having to do with effects due to the finite speed of light | ||
| physics.relativity.special | Relativistic effects in non-accelerated frames | ||
| physics.relativity.general | General relativistic effects, e.g. in accelerated frames | ||
| physics.reflection | Reflection/change of direction of a wave | ||
| physics.refraction | Refraction/change of direction of a wave due to the passage through a medium. | ||
| physics.scattering | Scattering of wave or particle | ||
| physics.shock | Shock front/wave (HD, MHD, Ionization, etc.) | ||
| physics.sublimation | Transition from a solid to a gaseous state | ||
| physics.turbulence | Having to do with stochastic or chaotic flows | ||
| physics.wave | Having to do with wave phenomena | ||
| physics.wave.amplitude | The linear strength of a wave | ||
| physics.wave.phase | The phase of a wave for a given frequency | ||
| planetary | Having to do with non-stellar objects within a planetary system around a planetary object | ||
| planetary.asteroid | Interplanetary terrestrial body | ||
| planetary.asteroid.Trojan | Asteroid co-orbiting at the L2/L3 points of a more massive planet-like body | ||
| planetary.asteroid.KBO | Kuiper-belt object, Trans-Neptunian object | KBO, TNO | |
| planetary.asteroid.near-Earth | Near-Earth asteroid | NEO | |
| planetary.comet | Interplanetary body which sublimates when heated | ||
| planetary.dwarfPlanet | Dwarf planet; Near-spherical, dynamically subordinate celestial body orbiting a star | ||
| planetary.meteoroid | Small asteroid which has survived the impact with another larger body | ||
| planetary.OortCloud | Having to do with the cloud of asteroids and comets far away from the star they orbit | ||
| planetary.planet | Near-spherical celestial body orbiting a star | ||
| planetary.planet.hotJupiter | Large planet in a close orbit around a star | ||
| planetary.satellite | Non-planet body orbiting another non-stellar object | ||
| planetary.satellite.artificial | Man-made satellite | planetary.satellite;device.spacecraft | |
| planetary.system | A complete set of planetary objects around a star | ||
| process | Having to do with astrophysically relevant but not physically fundamental phenomena, processes or features | ||
| process.accretion | Mass-accretion | ||
| process.atmosphere | Thin, gaseous outer layer | ||
| process.canyon | Large, deep gorge in a flatter landscape | ||
| process.chaos | Having to do with chaotic properties | ||
| process.chromosphere | Transition region between an atmosphere and a corona | ||
| process.cloud | Distinct region within an object of similar properties (see process.spot for a region with significantly different properties); not to be confused with diffuse.nebula! | ||
| process.coalescence | The process of merging into a single object | ||
| process.collapse | Gravitational collapse | ||
| process.collision | Collision of two or more distinct objects | ||
| process.cooling | Decrease in energy or temperature | ||
| process.corona | Hot, diffuse outer region of an object | ||
| process.crater | Flat depression left over after the impact of a small body on the surface of a large body | ||
| process.debris | Material left over after the end of a process/event | ||
| process.discharge | Sudden release | ||
| process.distortion | Unnormal change of properties | ||
| process.disruption | Non-explosive destruction | ||
| process.dust | Minute solid particles, typically with diameters less than 500 microns | process.grain | |
| process.echo | Delayed reception of a short signal due to reflection off another body. | ||
| process.erosion | Erosion | ||
| process.eruption | Sudden brightening, outburst | ||
| process.evolution | Slow change in properties | ||
| process.explosion | Explosion | ||
| process.extinction | Generic absorption of light | ||
| process.flow | Regular motion of a medium | ||
| process.formation | Having to do with the Formation or creation of an object | ||
| process.grain | Minute solid particles, typically with diameters less than 500 microns | process.dust | |
| process.heating | Increase in energy or temperature | ||
| process.instability | Generic instability | ||
| process.interaction | Generic interaction between two or more distinct objects | ||
| process.maser | Maser | ||
| process.mass-loss | Mass-loss | ucd:phys.mass.loss | |
| process.mass-loss.ejection | Ejection, loss of a distinct body of mass | ||
| process.mass-loss.jet | Mass-loss through a collimated jet | ||
| process.mass-loss.wind | Mass-loss through a poorly collimated wind | ||
| process.merging | Merging of two or more distinct objects | ||
| process.motion | Generic motion in space or angle | ||
| process.mountain | Large solid body extending beyond the surface of an object | ||
| process.photosphere | The region at which externally received light comes | ||
| process.prominence | A magnetic gaseous loop extending from the surface of an object | ||
| process.pulsation | Pulsation | ||
| process.pulsation.mode | Pulsation mode | ||
| process.pulsation.non-radial | Non-radial pulsation | ||
| process.pulsation.radial | Radial pulsation | ||
| process.redshift | Redshift (as a process, not as a measured quantity) | ||
| process.rotation | Rotation | ||
| process.starburst | Starburst | ||
| process.storm | A state of unusual activity | ||
| process.transfer | Propagation through a medium | ||
| process.volcanism | Surface feature or process created by thermal activity deep below the surface | ||
| sky | Having to do with definitions or phenomena relevant to an Earth-based astronomical observer | ||
| sky.airmass | Amount of atmosphere in a particular direction in units of that at the zenith | ucd:obs.airMass | |
| sky.altitude | Angle above the horizon. | ucd:pos.az.alt | |
| sky.azimuth | Position angle on the horizon (usually 0=N,90=E,..) | ucd:pos.az.azi | |
| sky.azimuth.east | The direction EAST | E | |
| sky.azimuth.north | The direction NORTH | N | |
| sky.azimuth.northeast | The direction NORTHEAST | NE | |
| sky.azimuth.northwest | The direction NORTHWEST | NW | |
| sky.azimuth.south | The direction SOUTH | S | |
| sky.azimuth.southeast | The direction SOUTHEAST | SE | |
| sky.azimuth.southwest | The direction SOUTHWEST | SW | |
| sky.azimuth.west | The direction WEST | W | |
| sky.parallacticAngle | Position angle relative to the meridian | ||
| sky.region | Some defined region of the sky | ||
| sky.region.asterism | Pattern of stars in the sky | ||
| sky.region.constellation | Region of the sky identifiable as an official constellation | ||
| sky.horizon | Local horizon | ||
| sky.meridian | Local meridian | ||
| sky.meteor | The trail of a small rock entering an atmosphere at high speed | ||
| sky.nadir | Local nadir | ||
| sky.nightGlow | Diffuse light from the sky, light pollution | ||
| sky.object | Generic object in the sky | ||
| sky.satellite | An artificial satellite in the sky | ||
| sky.zenith | Local zenith | ||
| sky.zenithDistance | Local zenith distance = 90 deg - altitude | ucd:pos.az.zd | |
| sky.zodiacalLight | Zodiacal light | ||
| sky.zodiacalLight.gegenschein | Gegenschein | ||
| source | Having to do with observable astronomical objects | ucd:src | |
| source.calibration | A source to be observed for calibration purposes | ucd:src.calib | |
| source.extended | Resolved source of angular size much larger than the resolution | ||
| source.properMotion | Angular motion of a source in the sky | ||
| source.resolved | Angularly resolved source | ||
| source.SED | Spectral energy distribution (unspecified units!) in some spectral region of interest | ||
| source.SED.blue | SED which increases to higher frequencies in the region of interest | ||
| source.SED.flat | SED which is roughly constant in the region of interest | ||
| source.SED.red | SED which increases to lower frequencies in the region of interest | ||
| source.superluminal | Source with apparently superluminal implied motion in space | ||
| source.unresolved | Angularly unresolved source | NOT;source.resolved | |
| star | Having to do with stellar objects | ||
| star.binary | Binary star | ||
| star.binary.spectroscopic | Spectroscopic (e.g. short-period) binary star | ||
| star.binary.Algol-class | Algol-type star | ||
| star.binary.betaLyr-class | Beta Lyr-type star | ||
| star.binary.close | Close binary star | ||
| star.binary.CV | Cataclysmic variable star | CV | |
| star.binary.CV.dwarfNova | CV with an erupting accretion disk | star.variable.UGem-class | |
| star.binary.CV.polar | CV with strongly magnetic primary | star.variable.AMHer-class | |
| star.binary.CV.intermediatePolar | CV with strongly magnetic rotating primary | star.variable.DQHer-class | |
| star.binary.CV.nova | Classical nova | star.variable.nova | |
| star.binary.CV.novalike | CV usually found in a state of high mass-accretion | ||
| star.binary.eclipsing | A binary system with high inclination, resulting in eclipses of one or more components. | ||
| star.binary.symbiotic | Symbiotic binary star | ||
| star.binary.WUMa-class | W UMa-type star | ||
| star.binary.visual | Visual (i.e. long-period) binary star | ||
| star.blackHole | Stellar black hole | ||
| star.blueStraggler | Blue straggler star | ||
| star.brownDwarf | Brown dwarf star | ||
| star.cluster | Cluster of stars | ||
| star.cluster.globular | Globular cluster of stars | ||
| star.cluster.open | Open cluster of stars | ||
| star.cluster.association | Loose association of stars | ||
| star.flare | Flare star | ||
| star.mainSequence | Main sequence star | ||
| star.mainSequence.post | Post-main sequence star | ||
| star.mainSequence.pre | Pre-main sequence star | PMS | |
| star.giant | Giant star (type I-III) | ||
| star.giant.asymptotic | Asymptotic giant branch star | AGB | |
| star.giant.horizontal | Horizontal giant branch star | HB | |
| star.giant.post-asymptotic | Post-asymptotic giant branch star | post-AGB | |
| star.high-mass | High-mass star | ||
| star.low-mass | Low-mass star | ||
| star.multiple | Higher order multiple stars (3 or more) | ||
| star.neutron | Neutron star | NS | |
| star.neutron.pulsar | Rapidly rotating magnetic neutron star | ||
| star.neutron.magnetar | Neutron star with an extremely large magnetic field | ||
| star.peculiar | An unusual stellar object | ||
| star.Population | Stellar content (e.g. of a cluster or galaxy) | ||
| star.Population.I | Population I star (metal-rich) | PopI | |
| star.Population.II | Population II star (metal poor) | PopII | |
| star.Population.III | Population III star (no/few metals) | PopIII | |
| star.proto | A star in the early stages of development | protostar | |
| star.spectralType | A star with a spectral type | star;ucd:src.spType | |
| star.spectralType.Be | A B-star with emission lines. | ||
| star.spectralType.HerbigAeBe | Pre-main sequence massive stars with emission lines. | ||
| star.spectralType.carbon | Carbon star | ||
| star.spectralType.early | Early-type star (early spectral type, i.e. hot) | ||
| star.spectralType.late | Late-type star (late spectral type, i.e. cold) | ||
| star.spectralType.# | Star of some other spectral type # (e.g. dM, G3, K5III) | ||
| star.subdwarf | Sub-dwarf star (lunimosity class VI) | ||
| star.subgiant | Sub-giant star (luminosity class IV) | ||
| star.supergiant | Supergiant star (luminosity class I-II) | ||
| star.supernova | Star which are or have undergone a supernova explosion | SN | |
| star.supernova.TypeIa | Supernovae of Type Ia | SNIa | |
| star.supernova.TypeIb | Supernovae of Type Ib | SNIb | |
| star.supernova.TypeIc | Supernovae of Type Ic | SNIc | |
| star.supernova.TypeII | Supernovae of Type II | SNII | |
| star.variable | Generic variable star | ||
| star.variable.alpha2CVn-class | Variable star of type alpha2 CVn (magnetic B-A dwarf stars). | ||
| star.variable.alphaCyg-class | Variable star of type alpha Cyg (nonradially pulsating B-A supergiants). | ||
| star.variable.AMHer-class | Variable star of type AM Her | star.binary.CV.polar | |
| star.variable.betaCep-class | Variable star of type beta Cep (pulsating O-B stars). | ||
| star.variable.BYDra-class | Variable star of type BY Dra (rapidly rotating K-M dwarf stars). | ||
| star.variable.Cepheid | Classical Cepheid variable star | star.variable.deltaCep-class | |
| star.variable.deltaSct-class | Variable star of type delta Scuti (pulsating A-F stars) | ||
| star.variable.DQHer-class | Variable star of type DQ Her | star.binary.CV.intermediatePolar | |
| star.variable.FKCom-class | Variable star of type FK Com (rapidly rotating G-K giants). | ||
| star.variable.FUOri-class | Variable star of type FU Ori (PMS with erupting accretion disks). | ||
| star.variable.gammaCas-class | Variable star of type gamma Cas (rapidly rotating B giants). | ||
| star.variable.gammaDor-class | Variable star of type gamma Dor (unusually long-period delta Sct stars). | ||
| star.variable.GWVir-class | Variable star of type GW Vir (pulsating hot white dwarfs). | PG1159 | |
| star.variable.irregular | Irregularly varying star | ||
| star.variable.long-period | Variable star with a very long period | LPV;star.variable.Mira-class | |
| star.variable.Mira-class | Variable star of type omicron Ceti = Mira | LPV;star.variable.omicronCet-class | |
| star.variable.nova | Nova eruption in a CV (thermonuclear eruption). | ||
| star.variable.nova.classical | Classical Nova | ||
| star.variable.nova.recurrent | Recurrant nova (short time between outbursts). | ||
| star.variable.omicronCet-class | Variable star of type omicron Ceti = Mira (pulsating red giants). | star.variable.Mira-class | |
| star.variable.Orion-class | Variable star of type Orion-variable | ||
| star.variable.RCrB-class | Variable star of type R CrB (H-poor, C- and He-rich supergiants). | ||
| star.variable.RRLyr-class | Variable star of type RR Lyr (radially pulsating A-F horizontal branch stars). | ||
| star.variable.RSCVn-class | Variable star of type RS CVn (close binaries with enhanced chromospheric activity). | ||
| star.variable.RVTau-class | Variable star of type RV Tau (radially pulsating F-G supergiants) | ||
| star.variable.SDor-class | Variable star of type S Dor (eruptive B-F stars) | ||
| star.variable.semi-regular | Variable star of the Semi-regular class | ||
| star.variable.SUUMa-class | CV star showing faint, short and frequest outbursts or less frequent, long superoutbursts | ||
| star.variable.SXAri-class | Variable star of type SX Ari (high-temperature analogues of alpha2 CVn) | ||
| star.variable.TTau-class | Pre-main sequence star of type T Tauri | TTS | |
| star.variable.TTau-class.classical | Pre-main sequence star of type classical T Tauri (substantial circumstellar disk). | CTTS | |
| star.variable.TTau-class.weak-line | Pre-main sequence star of type weak-line T Tauri (weak or no disk). | WTTS | |
| star.variable.UGem-class | CV with an accretion disk and quasi-periodic outbursts | star.binary.CV.dwarfNova | |
| star.variable.UVCet-class | Variable star of the UV Ceti class (K-M stars showing UV flares). | ||
| star.variable.WVir-class | Variable star of type W Vir (pulsating old disk stars related to delta Cep variables). | ||
| star.variable.ZCam-class | DV of type Z Cam, showing dwarf nova-like behavior but with standstills | ||
| star.variable.ZZCet-class | Variable star of type ZZ Cet (non-radially pulsating white dwarfs). | ||
| star.whiteDwarf | White dwarf star | WD | |
| star.Wolf-Rayet-class | Wolf-Rayet star | WR | |
| star.YSO | Young Stellar Object (see star.protostar) | YSO | |
| stat | Having to do with statistical properties of objects or concepts | ucd:stat | |
| stat.extreme | Being extreme in some sense. | ||
| stat.extreme | Being extreme in some sense. | ||
| stat.extreme.large | Being extremely large or high in some sense. | ||
| stat.extreme.small | Being extremely small or low in some sense. | ||
| stat.importance | Having to do with the importance or urgentness of an object or concept. | ||
| stat.importance.high | Important or urgent. | ||
| stat.importance.low | Not very important or urgent. | ||
| stat.importance.medium | Of normal importance or urgency. | ||
| stat.possible | A label indicating a possible association with some other object or concept | ||
| stat.probDistribution | The probability distribution of some quantity as a function of another | ||
| stat.unknown | An indication that the identity of an object or the validity of a concept is uncertain | ||
| time | Having to do with astronomical time | ||
| time.civil | Time measured within the local civil time zone | ||
| time.civil.daylightSavings | Time measured within the local civil time zone with a summer daylight savings correction | ||
| time.Julian | Time measured on the Julian calendar | ||
| time.Julian.date | Time measured on the Julian calendar in days since Jan. 1, 4713 BCE | JD | |
| time.Julian.date.modified | Time measured on the modified Julian calendar in days since ??? | MJD | |
| time.Gregorian | Time measured on the Gregorian calendar | ||
| time.Hijri | Time measured on the Islamic calendar | ||
| time.siderial | Siderial time | ST | |
| time.siderial.Greenwich | Greenwich siderial time | GST | |
| time.siderial.local | Local siderial time | LST | |
| time.universal | Universal Time | UT | |
| time.universal.GMT | Greenwich Mean Time, roughly equal to UT | GMT | |
| time.universal.UT1 | Universal Time measured in the UT1 system | UT1 | |
| time.universal.UTC | Coordinated Universal Time | UTC | |
| time.variation | Change in some property with time, generic activity | ||
| time.variation.appearance | Appearance of something not previously visible | ||
| time.variation.burst | Generic sudden increase and subsequent decrease with time | ||
| time.variation.cyclic | Cyclic, periodic change with time | ||
| time.variation.disappearance | Disappearance of something previously visible | ||
| time.variation.eclipse | Eclipse of two physically related objects (see time.variation.occultation) | ||
| time.variation.flare | Rapid change with time followed by a return to normalcy | ||
| time.variation.glitch | Sudden change of frequency | ||
| time.variation.high-state | Very luminous state of variable object, high-state | ||
| time.variation.low-state | Quiescent or low luminous state of variable object | ||
| time.variation.none | Abscence of (known) variation | ||
| time.variation.occultation | Occultation of two physically unrelated objects (see time.variation.eclipse) | ||
| time.variation.quasi-periodic | Semi-regular or quasi-periodic variation | ||
| time.variation.transient | Temporary, non-periodic change | ||
| AND | SV grammar token: expression of a logical "AND" between the preceeding and following tokens or token groups | ||
| isElementOf | SV grammar token: the preceeding token is a subset, member, or part of the following token | ||
| hasElements | SV grammar token: the following token is a subset, member, or part of the preceeding token | ||
| NOT | SV grammar token: expression of a logical negation of the following token or token group | ||
| OR | SV grammar token: expression of a logical "OR" between the adjacent tokens | ||
| [ | SV grammar token: defines the beginning of a token group (used to separate tokens into hierarchical token entities). | ||
| ] | SV grammar token: defines the end of a token group. |