A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Descriptionaltbroadernarrowerrelated
SAHA EQUATION      (SahaEquation)
IONS ,
THERMAL EQUILIBRIUM
 
SAMPLING      (Sampling)
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
Descriptionaltbroadernarrowerrelated
SAROS CYCLE      (SarosCycle)
LUNAR ECLIPSE ,
METONIC CYCLE ,
PHASE [MOON]
 
SATELLITE BORNE INSTRUMENTS      (SatelliteBorneInstruments)
AIRPLANE BORNE INSTRUMENTS ,
BALLOON BORNE INSTRUMENTS ,
COSMIC RAY ASTRONOMY ,
GAMMA RAY ASTRONOMY ,
GROUND BASED ASTRONOMY ,
INFRARED ASTRONOMY ,
MILLIMETER ASTRONOMY ,
ROCKET BORNE INSTRUMENTS ,
SPACE PROBE INSTRUMENTS ,
SPACE TELESCOPES ,
ULTRAVIOLET ASTRONOMY ,
X RAY ASTRONOMY
 
SATELLITE LASER RANGING      (SatelliteLaserRanging)
LASER RANGING ARTIFICIAL SATELLITES ,
LASERS ,
LUNAR LASER RANGING ,
OPTICAL RADAR
 
SATELLITES      (Satellites)
GALILEAN SATELLITES ,
MOON ,
PLANET SATELLITES 		PLANETESIMALS ,
PLANETS ,
PROTOPLANETS ,
RILLES ,
SOLAR SYSTEM ,
SURFACES [CELESTIAL BODIES] ,
TOPOGRAPHY ,
VOLCANOES
Natural satellites.
 
SCALE HEIGHT      (ScaleHeight)
ATMOSPHERES ,
ATMOSPHERIC DENSITY ,
EARTH ATMOSPHERE ,
STELLAR ATMOSPHERES
 
SCATTERING      (Scattering)
ATMOSPHERIC EXTINCTION ,
COMPTON SCATTERING ,
ELEMENTARY PARTICLE SCATTERING ,
GAMMA RAY SCATTERING ,
LIGHT SCATTERING ,
MIE SCATTERING 		RADIATION SCATTERING ,
REFLECTION ,
REFRACTION
 
SCHMIDT CAMERAS      (SchmidtCameras)
CAMERAS ,
PHOTOGRAPHIC INSTRUMENTS 		CORRECTOR PLATES ,
SCHMIDT TELESCOPES
 
SCHMIDT TELESCOPES      (SchmidtTelescopes)
CATADIOPTRIC SYSTEMS ,
PHOTOGRAPHIC INSTRUMENTS ,
REFLECTING TELESCOPES 		BAKER NUNN CAMERAS ,
CORRECTOR PLATES ,
MAKSUTOV TELESCOPES ,
OBJECTIVE PRISMS ,
SCHMIDT CAMERAS ,
WIDE FIELD TELESCOPES
 
SCHWARZSCHILD METRIC      (SchwarzschildMetric)
GENERAL THEORY OF RELATIVITY ,
GRAVITATIONAL FIELDS ,
IONIZATION ,
ORBITS ,
SPACETIME SINGULARITY
 
SCHWARZSCHILD RADIUS      (SchwarzschildRadius)
BLACK HOLES ,
GENERAL THEORY OF RELATIVITY
Limiting radius of black hole
 
  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Descriptionaltbroadernarrowerrelated
SCINTILLATION      (Scintillation)
ATMOSPHERIC SCINTILLATION ,
INTERPLANETARY SCINTILLATION ,
INTERSTELLAR SCINTILLATION ,
IONOSPHERIC SCINTILLATION ,
PHOSPHORESCENT SCINTILLATION 		ATMOSPHERES ,
ATMOSPHERIC REFRACTION ,
EARTH ,
EARTH ATMOSPHERE ,
SPECKLES ,
TURBULENCE [EARTH ATMOSPHERE]
 
SCINTILLATION COUNTERS      (ScintillationCounters)
COUNTERS CERENKOV COUNTERS IMAGE TUBES ,
PHOSPHORESCENCE ,
PHOSPHORESCENT SCINTILLATION ,
PHOTOMULTIPLIER TUBES
 
S DORADUS STARS      (SDoradusStars)
p cygni stars EARLY TYPE VARIABLE STARS ,
EMISSION LINE STARS ,
SHELL STARS 		P CYGNI LINE PROFILES
 
SEASONAL PHENOMENA      (SeasonalPhenomena)
Combine with other terms
 
SEASONS      (Seasons)
Combine with other terms
 
SECONDARY COSMIC RAYS      (SecondaryCosmicRays)
COSMIC RAY SHOWERS ,
COSMIC RAYS
 
SECONDARY MIRRORS      (SecondaryMirrors)
TELESCOPE MIRRORS CASSEGRAIN ANTENNAS ,
CASSEGRAIN FOCUS ,
OPTICAL TELESCOPES ,
PRIMARY MIRRORS ,
REFLECTING TELESCOPES ,
SUBREFLECTORS
 
SECULAR PARALLAX      (SecularParallax)
PARALLAXES MOVING CLUSTER PARALLAX ,
PROPER MOTIONS ,
STAR ASSOCIATIONS
 
SEEING      (Seeing)
DOME SEEING ACTIVE OPTICS ,
ADAPTIVE OPTICS ,
ATMOSPHERIC REFRACTION ,
ATMOSPHERIC SCINTILLATION ,
EARTH ATMOSPHERE ,
POINT SPREAD FUNCTION ,
SEEING MONITORS ,
SITE TESTING ,
SPECKLE INTERFEROMETRY ,
SPECKLES ,
TIP TILT MIRRORS ,
TURBULENCE [EARTH ATMOSPHERE]
 
SEEING MONITORS      (SeeingMonitors)
OPTICAL INSTRUMENTS OPTICAL OBSERVATORIES ,
SEEING ,
SITE TESTING
 
  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Descriptionaltbroadernarrowerrelated
SEGMENTED OPTICS      (SegmentedOptics)
ADAPTIVE OPTICS ,
MULTIPLE MIRROR TELESCOPES ,
TIP TILT MIRRORS ,
VERY LARGE TELESCOPES
 
SEISMOLOGY      (Seismology)
ASTEROSEISMOLOGY ,
HELIOSEISMOLOGY 		EARTH ,
STELLAR OSCILLATIONS ,
VIBRATION
 
SELECTION EFFECTS      (SelectionEffects)
ERRORS CORRECTIONS ,
STATISTICS
Combine with other terms
 
SELECTIVE ABSORPTION      (SelectiveAbsorption)
GAS TO DUST RATIO ,
INTERSTELLAR MATTER ,
INTERSTELLAR REDDENING ,
REDDENING ,
REDDENING LAW
 
SELENOLOGY      (Selenology)
MOON
 
SELF ABSORPTION      (SelfAbsorption)
SPECTRA
 
SELF CALIBRATION METHODS      (SelfCalibrationMethods)
CALIBRATION
 
SEMIBARIUM STARS      (SemibariumStars)
BARIUM STARS
 
SEMICONDUCTOR DEVICES      (SemiconductorDevices)
CHARGE COUPLED DEVICES ,
CHARGE INJECTION DEVICES ,
CHARGE TRANSFER DEVICES ,
PHOTOVOLTAIC CELLS 		DETECTORS ,
GUNN DIODES
 
SEMIDETACHED BINARY STARS      (SemidetachedBinaryStars)
BINARY STARS ,
CLOSE BINARY STARS 		DETACHED BINARY STARS
 
  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Descriptionaltbroadernarrowerrelated
SEMIMAJOR AXIS      (SemimajorAxis)
ORBITAL ELEMENTS BINARY STARS ,
PLANETS
 
SEMIREGULAR VARIABLE STARS      (SemiregularVariableStars)
LATE TYPE GIANT STARS ,
PULSATING VARIABLE STARS ,
VARIABLE STARS 		RV TAURI STARS ,
S VULPECULAE STARS 		IRREGULAR VARIABLE STARS ,
MIRA VARIABLE STARS ,
SUPERGIANT STARS
 
SENSITIVITY      (Sensitivity)
DETECTORS ,
INTEGRATION TIME ,
LIMITING MAGNITUDES ,
POLAR DIAGRAM ,
PRECISION ,
RESOLUTION ,
SIGNAL DETECTION ,
SIGNAL TO NOISE RATIO
 
SENSITOMETERS      (Sensitometers)
MEASURING INSTRUMENTS
 
SEPARATION      (Separation)
BINARY STARS ,
OCCULTING DISK ,
VISUAL BINARY STARS
Combine with other terms
 
SEXTANTS      (Sextants)
ASTROMETRIC INSTRUMENTS ,
INSTRUMENTATION 		ALTITUDE [ANGLE]
 
SEYFERT GALAXIES      (SeyfertGalaxies)
PECULIAR GALAXIES BL LACERTAE OBJECTS ,
COMPACT NUCLEI ,
EMISSION LINE GALAXIES ,
MARKARIAN GALAXIES ,
MASSIVE OBJECTS ,
SEYFERT NUCLEI ,
X RAY SOURCES
 
SEYFERT NUCLEI      (SeyfertNuclei)
ACTIVE GALACTIC NUCLEI ,
COMPACT NUCLEI ,
EMISSION LINE GALAXIES 		SEYFERT GALAXIES
 
SHADOW BANDS      (ShadowBands)
DIFFRACTION ,
INTERFERENCE [WAVES] ,
SOLAR ECLIPSE
 
SHAPED REFLECTORS      (ShapedReflectors)
RADIO TELESCOPES
 
  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Descriptionaltbroadernarrowerrelated
SHELL BURNING      (ShellBurning)
CARBON BURNING ,
HELIUM BURNING ,
HYDROGEN BURNING ,
NUCLEAR FUSION
Nuclear fusion in shell
 
SHELLS      (Shells)
CIRCUMSTELLAR SHELLS ,
CONVECTIVE SHELLS ,
DUST SHELLS 		SHELL STARS
 
SHELL STARS      (ShellStars)
EMISSION LINE STARS GAMMA CASSIOPEIAE STARS ,
S DORADUS STARS ,
Z ANDROMEDAE STARS 		CIRCUMSTELLAR SHELLS ,
P CYGNI LINE PROFILES ,
SHELLS
 
SHEPHERD SATELLITES      (ShepherdSatellites)
PLANETARY RINGS ,
RESONANCE GAPS
 
SHOCKS      (Shocks)
COLLISIONAL PLASMAS ,
IONIZATION ,
STELLAR WINDS ,
SUPERNOVAS
Combine with other terms
 
SHOCK WAVES      (ShockWaves)
BOW SHOCKS ,
IONIZING SHOCK WAVES 		JUMP CONDITIONS ,
RANKINE HUGONIOT RELATIONS ,
SPEED OF SOUND ,
SUPERNOVA ENVELOPES ,
VELOCITY FIELD ,
WAVE PROPAGATION
 
SHORT PERIOD VARIABLE STARS      (ShortPeriodVariableStars)
BETA CEPHEI STARS ,
DELTA SCUTI STARS
 
SHOT NOISE      (ShotNoise)
NOISE DETECTORS ,
ELECTRONIC EQUIPMENT
 
SIDELOBES      (Sidelobes)
lobes [telescope beams] POLAR DIAGRAM ,
RADIO ANTENNAS ,
RESOLUTION
 
SIDEREAL TIME      (SiderealTime)
TIME EARTH ,
EQUATION OF THE EQUINOXES ,
HOUR ANGLE ,
TRANSIT TIME ,
YEAR
 
  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Descriptionaltbroadernarrowerrelated
SIDEROSTATS      (Siderostats)
ALTAZIMUTH MOUNTING ,
COELOSTATS ,
DRIVES ,
HELIOSTATS ,
TELESCOPE MOUNTINGS
 
SIGNAL ANALYSIS      (SignalAnalysis)
ANALYSES SIGNAL DETECTION ,
SIGNAL PROCESSING
 
SIGNAL DETECTION      (SignalDetection)
DETECTION DETECTORS ,
LIMITING MAGNITUDES ,
SENSITIVITY ,
SIGNAL ANALYSIS ,
SIGNAL PROCESSING
 
SIGNAL PROCESSING      (SignalProcessing)
ANALYSES SIGNAL ANALYSIS ,
SIGNAL DETECTION
 
SIGNAL TO NOISE RATIO      (SignalToNoiseRatio)
BACKGROUND NOISE ,
INTEGRATION TIME ,
LIMITING MAGNITUDES ,
NOISE ,
SENSITIVITY ,
SKY NOISE
 
SILICON BURNING      (SiliconBurning)
NUCLEAR FUSION ,
NUCLEOSYNTHESIS 		CARBON BURNING ,
HELIUM BURNING ,
HYDROGEN BURNING
 
SILICON STARS      (SiliconStars)
Ap STARS ,
METAL RICH STARS
 
SILVER COATINGS      (SilverCoatings)
COATINGS ,
THIN FILMS 		ALUMINUM COATINGS ,
SURFACES [OPTICAL]
 
SIMULATION      (Simulation)
COMPUTER SIMULATIONS MODELS
 
SINGULARITY      (Singularity)
NAKED SINGULARITY ,
SPACETIME SINGULARITY
 
  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Descriptionaltbroadernarrowerrelated
SiO MASERS      (SiOMasers)
MASERS INTERSTELLAR MATTER ,
OH MASERS ,
RADIO SOURCES ,
WATER MASERS
 
SITE PROTECTION      (SiteProtection)
AIR POLLUTION ,
LIGHT POLLUTION ,
OBSERVATORIES
 
SITE TESTING      (SiteTesting)
OBSERVATORIES ,
POLLUTION ,
SEEING ,
SEEING MONITORS ,
SKY BRIGHTNESS
 
SKY      (Sky)
Combine with other terms
 
SKY BRIGHTNESS      (SkyBrightness)
NIGHT SKY BRIGHTNESS AIRGLOW ,
ATMOSPHERIC RADIATION ,
AURORAS ,
BACKGROUND RADIATION ,
MILKY WAY GALAXY ,
SITE TESTING ,
SUNLIGHT ,
TWILIGHT ,
ZODIACAL LIGHT
 
SKY NOISE      (SkyNoise)
NOISE BACKGROUND NOISE ,
SIGNAL TO NOISE RATIO
 
SKY SURVEYS      (SkySurveys)
SURVEYS ATLASES ,
CATALOGS ,
FINDING CHARTS ,
MAPS
 
SLOW NOVAS      (SlowNovas)
NOVAS DQ HERCULIS STARS ,
NOVOIDS 		FAST NOVAS ,
RECURRENT NOVAS
 
SMALL MAGELLANIC CLOUD      (SmallMagellanicCloud)
MAGELLANIC CLOUDS LARGE MAGELLANIC CLOUD
 
SOLAR      (Solar)
See under SUN
 
  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Descriptionaltbroadernarrowerrelated
SOLAR ACTIVITY      (SolarActivity)
SOLAR STORMS ACTIVE SUN ,
ACTIVITY INDEXES ,
AURORAS ,
BUTTERFLY DIAGRAM ,
CORONAL LOOPS ,
EPHEMERAL ACTIVE REGIONS ,
FLARES ,
HELIOSPHERE ,
MAGNETIC STORMS ,
MAUNDER MINIMUM ,
PROMINENCES ,
SOLAR ATMOSPHERE ,
SOLAR CYCLE ,
SOLAR WIND ,
SUNSPOT CYCLE ,
SUNSPOT GROUPS ,
SUNSPOT NUMBERS ,
SUNSPOTS
 
SOLAR ATMOSPHERE      (SolarAtmosphere)
STELLAR ATMOSPHERES CHROMOSPHERE ,
HELIOPAUSE ,
HELIOSPHERE ,
LIMB DARKENING ,
LINE FORMATION ,
SOLAR ACTIVITY ,
SOLAR CORONA ,
SOLAR PHYSICS ,
SOLAR STORMS ,
SOLAR SURFACE ,
SOLAR TERRESTRIAL RELATIONS ,
SOLAR WIND
 
SOLAR CONSTANT      (SolarConstant)
RADIATION ,
SOLAR PHYSICS ,
SUN ,
SUNLIGHT
 
SOLAR CORONA      (SolarCorona)
CORONAS M REGIONS CORONAGRAPHS ,
CORONAL HOLES ,
CORONAL LINES ,
CORONAL LOOPS ,
CORONAL MASS EJECTIONS ,
CORONAL PLUMES ,
CORONAL TRANSIENTS ,
K CORONA ,
SOLAR ATMOSPHERE ,
SUN ,
TRANSITION REGION
 
SOLAR CYCLE      (SolarCycle)
ACTIVE SUN ,
BUTTERFLY DIAGRAM ,
QUIET SUN ,
SOLAR ACTIVITY ,
SOLAR PHYSICS ,
SUNSPOT CYCLE ,
SUNSPOT NUMBERS
 
SOLAR DAY      (SolarDay)
EPHEMERIS TIME ,
UNIVERSAL TIME
 
SOLAR ECLIPSE      (SolarEclipse)
ECLIPSES BAILYS BEADS ,
DIAMOND RING EFFECT ,
FLASH SPECTRUM ,
MOON ,
PENUMBRA ,
SHADOW BANDS ,
SUN ,
UMBRA ,
ZONE OF TOTALITY
 
SOLAR INTERIOR      (SolarInterior)
STELLAR INTERIORS SOLAR NEUTRINO PROBLEM ,
SOLAR PHYSICS ,
STELLAR EVOLUTION ,
STELLAR STRUCTURE
 
SOLAR MOTION      (SolarMotion)
MOTION ANTAPEX ,
APEX
With respect to nearby stars.
 
SOLAR NEBULA      (SolarNebula)
PLANETS ,
PROTOPLANETARY NEBULAS ,
PROTOPLANETS ,
SOLAR SYSTEM
 
  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Descriptionaltbroadernarrowerrelated
SOLAR NEUTRINO PROBLEM      (SolarNeutrinoProblem)
NEUTRINOS ,
NUCLEAR REACTIONS ,
SOLAR INTERIOR
 
SOLAR OBSERVATORIES      (SolarObservatories)
CORONAGRAPHS ,
SOLAR OPTICAL TELESCOPES ,
SOLAR RADIO TELESCOPES ,
SOLAR TELESCOPES
 
SOLAR OPTICAL TELESCOPES      (SolarOpticalTelescopes)
SOLAR TELESCOPES SOLAR OBSERVATORIES ,
SOLAR RADIO TELESCOPES
 
SOLAR OSCILLATIONS      (SolarOscillations)
five minute oscillations STELLAR OSCILLATIONS ASTEROSEISMOLOGY ,
HELIOSEISMOLOGY
 
SOLAR PARALLAX      (SolarParallax)
ASTRONOMICAL UNIT ,
EARTH ORBIT
 
SOLAR PHYSICS      (SolarPhysics)
FORBUSH EFFECT ,
SOLAR ATMOSPHERE ,
SOLAR CONSTANT ,
SOLAR CYCLE ,
SOLAR INTERIOR ,
SOLAR TELESCOPES ,
SOLAR TERRESTRIAL RELATIONS ,
SUN
 
SOLAR PLANETARY RELATIONS      (SolarPlanetaryRelations)
SOLAR TERRESTRIAL RELATIONS PLANETS ,
SOLAR SYSTEM ,
SUN
 
SOLAR RADIO TELESCOPES      (SolarRadioTelescopes)
SOLAR TELESCOPES SOLAR OBSERVATORIES ,
SOLAR OPTICAL TELESCOPES
 
SOLAR STORMS      (SolarStorms)
SOLAR ACTIVITY SOLAR ATMOSPHERE
 
SOLAR SURFACE      (SolarSurface)
PHOTOSPHERE ,
SOLAR ATMOSPHERE ,
SUN ,
SUPERGRANULATION
 
  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Descriptionaltbroadernarrowerrelated
SOLAR SYSTEM      (SolarSystem)
PLANETARY SYSTEMS ALIGNMENT [PLANETS] ,
BODES LAW ,
COMETS ,
EARTH ,
EARTH MOON SYSTEM ,
EXTRASOLAR PLANETS ,
KREUTZ SUNGRAZERS ,
MINOR PLANETS ,
ORIGIN ,
PLANETARY THEORY ,
PLANETESIMALS ,
PLANETS ,
PRESOLAR NEBULA ,
PROTOPLANETS ,
SATELLITES ,
SOLAR NEBULA ,
SOLAR PLANETARY RELATIONS ,
SUN ,
SYNODIC PERIOD ,
TRANSPLUTONIAN PLANETS
Not a complete list of terms.
 
SOLAR TELESCOPES      (SolarTelescopes)
tower telescope TELESCOPES RADIOHELIOGRAPHS ,
SOLAR OPTICAL TELESCOPES ,
SOLAR RADIO TELESCOPES 		HELIOSTATS ,
SOLAR OBSERVATORIES ,
SOLAR PHYSICS
 
SOLAR TERRESTRIAL RELATIONS      (SolarTerrestrialRelations)
SOLAR PLANETARY RELATIONS EARTH ,
SOLAR ATMOSPHERE ,
SOLAR PHYSICS ,
SUN
 
SOLAR WIND      (SolarWind)
INTERPLANETARY MATTER ,
PLASMAS ,
STELLAR WINDS 		CORONAL HOLES ,
HELIOPAUSE ,
HELIOSPHERE ,
INTERPLANETARY GAS ,
INTERSTELLAR WINDS ,
POYNTING ROBERTSON EFFECT ,
RADIATION PRESSURE ,
SOLAR ACTIVITY ,
SOLAR ATMOSPHERE
 
SOLSTICES      (Solstices)
SUMMER SOLSTICE ,
WINTER SOLSTICE 		ECLIPTIC ,
EQUINOXES ,
TROPIC OF CANCER ,
TROPIC OF CAPRICORN
 
SOUTH CELESTIAL POLE      (SouthCelestialPole)
CELESTIAL POLES NORTH CELESTIAL POLE
 
SOUTHERN HEMISPHERE      (SouthernHemisphere)
NORTHERN HEMISPHERE
 
SOUTH GALACTIC POLE      (SouthGalacticPole)
GALACTIC POLES NORTH GALACTIC POLE
 
SPACE      (Space)
GENERAL THEORY OF RELATIVITY ,
SPECIAL THEORY OF RELATIVITY ,
VACUUM
 
SPACE ASTROMETRY      (SpaceAstrometry)
ASTROMETRY ORBITING OBSERVATORIES ,
SPACE GEODESY ,
SPACE OBSERVATORIES
 
  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Descriptionaltbroadernarrowerrelated
SPACE ASTRONOMY      (SpaceAstronomy)
GAMMA RAY ASTRONOMY ,
ORBITING OBSERVATORIES ,
ULTRAVIOLET ASTRONOMY ,
X RAY ASTRONOMY 		ARTIFICIAL SATELLITES ,
SPACE EXPLORATION ,
SPACE PROBES
 
SPACE BIOLOGY      (SpaceBiology)
cosmobiology SPACE RESEARCH SPACE OBSERVATORIES ,
SPACE VEHICLES
 
SPACE DEBRIS      (SpaceDebris)
debris SPACE VEHICLES SPACE LAW ,
SPACE POLLUTION
 
SPACE EXPLORATION      (SpaceExploration)
DISCOVERIES ,
INTERSTELLAR COMMUNICATION ,
PLANETS ,
SPACE ASTRONOMY ,
SPACE OBSERVATORIES ,
SPACE PROBES ,
SPACE RESEARCH ,
SPACE TELESCOPES ,
SPACE VEHICLES
 
SPACE GEODESY      (SpaceGeodesy)
GEODESY ORBITING OBSERVATORIES EARTH ,
SPACE ASTROMETRY ,
SPACE OBSERVATORIES
 
SPACE LAW      (SpaceLaw)
SPACE DEBRIS ,
SPACE RESEARCH
 
SPACE MOTION      (SpaceMotion)
MOTION PROPER MOTIONS ,
RADIAL VELOCITY 		GALACTIC ROTATION ,
STELLAR MOTIONS ,
TRANSVERSE VELOCITY
 
SPACE OBSERVATORIES      (SpaceObservatories)
OBSERVATORIES GAMMA RAY OBSERVATORIES ,
ORBITING OBSERVATORIES ,
X RAY OBSERVATORIES 		INFRARED OBSERVATORIES ,
SPACE ASTROMETRY ,
SPACE BIOLOGY ,
SPACE EXPLORATION ,
SPACE GEODESY ,
SPACE PROBES ,
SPACE RESEARCH ,
SPACE TELESCOPES ,
ULTRAVIOLET ASTRONOMY ,
X RAY ASTRONOMY
Named observatories not included.
 
SPACE POLLUTION      (SpacePollution)
POLLUTION SPACE DEBRIS
 
SPACE PROBE INSTRUMENTS      (SpaceProbeInstruments)
SPACE TELESCOPES BALLOON BORNE INSTRUMENTS ,
GROUND BASED ASTRONOMY ,
ROCKET BORNE INSTRUMENTS ,
SATELLITE BORNE INSTRUMENTS ,
SPACE PROBES
 
  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Descriptionaltbroadernarrowerrelated
SPACE PROBES      (SpaceProbes)
probes SPACE ASTRONOMY ,
SPACE EXPLORATION ,
SPACE OBSERVATORIES ,
SPACE PROBE INSTRUMENTS ,
SPACE VEHICLES
 
SPACE RESEARCH      (SpaceResearch)
space science ASTRONOMICAL RESEARCH SPACE BIOLOGY SPACE EXPLORATION ,
SPACE LAW ,
SPACE OBSERVATORIES
 
SPACE TELESCOPES      (SpaceTelescopes)
SPACE PROBE INSTRUMENTS ,
TELESCOPES 		GAMMA RAY TELESCOPES ,
ULTRAVIOLET TELESCOPES ,
X RAY TELESCOPES 		ARTIFICIAL SATELLITES ,
BALLOON BORNE INSTRUMENTS ,
GROUND BASED ASTRONOMY ,
ROCKET BORNE INSTRUMENTS ,
SATELLITE BORNE INSTRUMENTS ,
SPACE EXPLORATION ,
SPACE OBSERVATORIES
Named telescopes not included.
 
SPACETIME SINGULARITY      (SpacetimeSingularity)
SINGULARITY BLACK HOLES ,
NAKED SINGULARITY ,
QUANTUM COSMOLOGY ,
SCHWARZSCHILD METRIC
 
SPACE VEHICLES      (SpaceVehicles)
SPACE DEBRIS ARTIFICIAL SATELLITES ,
SPACE BIOLOGY ,
SPACE EXPLORATION ,
SPACE PROBES
Named vehicles not included.
 
SPECIAL THEORY OF RELATIVITY      (SpecialTheoryOfRelativity)
GENERAL THEORY OF RELATIVITY SPACE
 
SPECKLE INTERFEROMETRY      (SpeckleInterferometry)
INTERFEROMETRY ANGULAR DIAMETERS ,
ANGULAR RESOLUTION ,
ANGULAR SEPARATION ,
SEEING ,
SPECKLES
 
SPECKLES      (Speckles)
ATMOSPHERIC REFRACTION ,
SCINTILLATION ,
SEEING ,
SPECKLE INTERFEROMETRY
 
SPECTRA      (Spectra)
spectrum ABSORPTION SPECTRA ,
ATOMIC SPECTRA ,
BRILLOUIN SPECTRA ,
CONTINUOUS SPECTRA ,
ECHELLE SPECTRA ,
EMISSION SPECTRA ,
HYDROGEN SPECTRUM ,
MICROWAVE SPECTRA ,
MOLECULAR SPECTRA ,
RADIO SPECTRA ,
TWO DIMENSIONAL SPECTRA ,
VIBRATIONAL SPECTRA ,
VISIBLE SPECTRUM 		ABSORPTION LINES ,
BREMSSTRAHLUNG ,
CONTINUA ,
DIFFRACTION GRATINGS ,
EMISSION LINES ,
ENERGY LEVELS ,
EQUIVALENT WIDTHS ,
FLUORESCENCE ,
FORBIDDEN LINES ,
FORBIDDEN TRANSITIONS ,
FREE BOUND EMISSION ,
FREE FREE EMISSION ,
HERTZSPRUNG RUSSELL DIAGRAM ,
HYPERFINE LINES ,
MK CLASSIFICATION ,
PRISMS ,
RECOMBINATION LINES ,
RESONANCE LINES ,
SELF ABSORPTION ,
SPECTROSCOPIC ANALYSIS ,
SPECTROSCOPY ,
STIMULATED EMISSION
Not a complete list of terms.
 
SPECTRAL BANDS      (SpectralBands)
MOLECULAR BANDS MOLECULAR LINES ,
MOLECULAR SPECTRA ,
TELLURIC LINES
 
  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Descriptionaltbroadernarrowerrelated
SPECTRAL CLASSIFICATION      (SpectralClassification)
CLASSIFICATION HENRY DRAPER SYSTEM ,
MK CLASSIFICATION 		HENRY DRAPER CATALOG ,
LUMINOSITY CLASSIFICATION ,
SPECTRAL TYPES
 
SPECTRAL INDICES      (SpectralIndices)
RADIO FREQUENCIES ,
RADIO SPECTRA
 
SPECTRAL LINES      (SpectralLines)
spectrum lines ABSORPTION LINES ,
CALCIUM LINES ,
CARBON LINES ,
EMISSION LINES ,
METAL LINES ,
MOLECULAR LINES ,
TECHNETIUM LINES ,
TELLURIC LINES ,
ULTRAVIOLET LINES 		EQUIVALENT WIDTHS ,
FINE STRUCTURE ,
INSTRUMENTAL PROFILES ,
LINE BLANKETING ,
LINE BLENDING ,
LINE BROADENING ,
LINE FORMATION ,
LINE IDENTIFICATIONS ,
LINE INTENSITITES ,
LINE PROFILES ,
LINE RATIOS ,
NATURAL LINE BROADENING ,
NATURAL LINE WIDTH ,
SPECTRAL TYPES ,
TRANSITION PROBABILITIES
Not a complete list of terms.
 
SPECTRAL RESOLUTION      (SpectralResolution)
RESOLUTION LINE BLENDING
 
SPECTRAL TYPES      (SpectralTypes)
A STARS ,
B STARS ,
F STARS ,
G STARS ,
K STARS ,
LINE WIDTHS ,
LUMINOSITY CLASS ,
LUMINOSITY CLASSIFICATION ,
M STARS ,
N STARS ,
O STARS ,
R STARS ,
S STARS ,
SPECTRAL CLASSIFICATION ,
SPECTRAL LINES ,
STANDARD STARS ,
TEMPERATURE
Not a complete list of terms.
 
SPECTROGRAPHS      (Spectrographs)
optical spectrometers OPTICAL INSTRUMENTS ,
TELESCOPE INSTRUMENTATION 		COUDE SPECTROGRAPHS ,
ECHELLE SPECTROGRAPHS ,
GAMMA RAY SPECTROGRAPHS ,
GRATING SPECTROGRAPHS ,
PRISM SPECTROGRAPHS ,
RADIO SPECTROGRAPHS ,
ULTRAVIOLET SPECTROGRAPHS ,
X RAY SPECTROGRAPHS 		DIFFRACTION GRATINGS ,
ECHELLE GRATINGS ,
GRISMS ,
PRISMS ,
SPECTROHELIOGRAPHS
 
SPECTROGRAPHY      (Spectrography)
spectrophotography PHOTOGRAPHY
See SPECTROSCOPY.
 
SPECTROHELIOGRAPHS      (Spectroheliographs)
CORONAGRAPHS ,
PHOTOHELIOGRAPHS ,
SPECTROGRAPHS
 
SPECTROMETERS      (Spectrometers)
optical spectrometers INSTRUMENTATION FABRY PEROT SPECTROMETERS ,
FOURIER SPECTROMETERS ,
MULTICHANNEL SPECTROMETERS ,
RADIO SPECTROMETERS ,
X RAY SPECTROMETERS 		SPECTROMETRY
Also see under SPECTROGRAPHS
 
SPECTROMETRY      (Spectrometry)
ASTRONOMICAL TECHNIQUES ,
OBSERVING TECHNIQUES 		RADIAL VELOCITY ,
SPECTROMETERS
 
  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Descriptionaltbroadernarrowerrelated
SPECTROPHOTOMETERS      (Spectrophotometers)
PHOTOMETERS SPECTROPHOTOMETRY ,
TELESCOPE INSTRUMENTATION
 
SPECTROPHOTOMETRY      (Spectrophotometry)
ASTRONOMICAL TECHNIQUES ,
OBSERVING TECHNIQUES 		COLOR ,
OPTICAL SCANNERS ,
PHOTOMETRY ,
SPECTROPHOTOMETERS ,
SPECTROSCOPY ,
STANDARD CANDLES
 
SPECTROSCOPIC ANALYSIS      (SpectroscopicAnalysis)
spectral analysis ABSORPTION LINES ,
COLLISION BROADENING ,
CONTINUOUS SPECTRA ,
DOPPLER EFFECT ,
EMISSION LINES ,
MAXIMUM ENTROPY METHODS ,
MILNE EDDINGTON APPROXIMATION ,
SPECTRA ,
WAVE MOTION ,
WAVEFORM ANALYSIS
 
SPECTROSCOPIC BINARY STARS      (SpectroscopicBinaryStars)
spectrum binary stars BINARY STARS TWO SPECTRUM BINARY STARS DOPPLER EFFECT ,
ECLIPSING BINARY STARS ,
ELLIPSOIDAL VARIABLE STARS ,
MASS ,
MASS FUNCTION ,
VELOCITY CURVES
 
SPECTROSCOPY      (Spectroscopy)
spectrophotography ASTRONOMICAL TECHNIQUES ,
OBSERVING TECHNIQUES 		ABSORPTION SPECTROSCOPY ,
COLLISION SPECTROSCOPY ,
FOURIER TRANSFORM SPECTROSCOPY ,
GAMMA RAY SPECTROSCOPY ,
HIGH RESOLUTION SPECTROSOPY ,
INTERFERENCE SPECTROSOCOPY ,
MICROWAVE SPECTROSCOPY ,
OPTICAL SPECTROSCOPY ,
RAMAN SPECTROSCOPY ,
TIME RESOLVED SPECTROSCOPY ,
TWO DIMENSIONAL SPECTROSCOPY ,
X RAY SPECTROSCOPY 		COLLISIONAL EXCITATION ,
CONTINUOUS SPECTRA ,
HETERODYNE ,
PRESSURE BROADENING ,
RESEAUX ,
SPECTRA ,
SPECTROPHOTOMETRY
Not a complete list of terms.
 
SPECTRUM VARIABLE STARS      (SpectrumVariableStars)
Am STARS ,
Ap STARS ,
INTRINSIC VARIABLE STARS 		MANGANESE STARS ALPHA2 CANUM VENATICORUM STARS ,
MAGNETIC STARS ,
OBLIQUE ROTATORS
 
SPEED OF SOUND      (SpeedOfSound)
ACOUSTIC WAVES ,
SHOCK WAVES
 
SPHERICAL ABERRATION      (SphericalAberration)
ABERRATIONS ASTIGMATISM ,
CHROMATIC ABERRATION ,
COMA ,
DISTORTION ,
FIELD CURVATURE
 
SPHERICAL COORDINATES      (SphericalCoordinates)
angular coordinates COORDINATE SYSTEMS ,
POSITIONS ,
REFERENCE SYSTEMS
 
SPICULES      (Spicules)
MACRO SPICULES CHROMOSPHERE ,
SUN
 
  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Descriptionaltbroadernarrowerrelated
SPIRAL ARMS      (SpiralArms)
arms GALACTIC STRUCTURE ,
GAS DISTRIBUTION ,
INTERSTELLAR MAGNETIC FIELDS ,
INTERSTELLAR MATTER ,
OPEN STAR CLUSTERS ,
PITCH ANGLE ,
POPULATION I STARS ,
SPIRAL GALAXIES
 
SPIRAL GALAXIES      (SpiralGalaxies)
GALAXIES BARRED SPIRAL GALAXIES ,
MILKY WAY GALAXY 		LATE TYPE GALAXIES ,
PITCH ANGLE ,
SPIRAL ARMS
 
s PROCESS      (sProcess)
NUCLEOSYNTHESIS ,
p PROCESS ,
r PROCESS ,
SUPERNOVAS
 
SS CYGNI STARS      (SsCygniStars)
CATACLYSMIC VARIABLE STARS ,
ERUPTIVE BINARY STARS ,
U GEMINORUM STARS 		SU URSAE MAJORIS STARS ,
Z CAMELOPARDALIS STARS
 
S STARS      (SStars)
se stars GIANT STARS ,
LATE TYPE STARS 		BARIUM STARS ,
CARBON STARS ,
HEAVY METAL STARS ,
SPECTRAL TYPES ,
TECHNETIUM STARS ,
ZIRCONIUM STARS
 
STABILITY      (Stability)
VIBRATION
Combine with other terms
 
STANDARD CANDLES      (StandardCandles)
EFFECTIVE TEMPERATURE ,
PHOTOMETRIC STANDARD STARS ,
PHOTOMETRY ,
SPECTROPHOTOMETRY
 
STANDARD EPOCH      (StandardEpoch)
BESSELIAN EPOCH ,
JULIAN EPOCH
 
STANDARD STARS      (StandardStars)
PHOTOMETRIC STANDARD STARS COMPARISON STARS ,
POSITIONS ,
SPECTRAL TYPES
 
STAR ASSOCIATIONS      (StarAssociations)
O ASSOCIATIONS ,
OB ASSOCIATIONS ,
R ASSOCIATIONS ,
T ASSOCIATIONS 		GOULDS BELT ,
OPEN STAR CLUSTERS ,
SECULAR 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
Descriptionaltbroadernarrowerrelated
STAR ATLASES      (StarAtlases)
ATLASES FINDING CHARTS ,
MAPS
 
STARBURST GALAXIES      (StarburstGalaxies)
GALAXIES STAR FORMATION ,
STELLAR EVOLUTION
 
STAR CLUSTERS      (StarClusters)
clusters of stars CLUSTERS GLOBULAR STAR CLUSTERS ,
OPEN STAR CLUSTERS 		CLUSTER ROTATION ,
CLUSTERING ,
INITIAL MASS FUNCTION ,
INTEGRATED MAGNITUDE ,
LUMINOSITY FUNCTION ,
MASS FUNCTION ,
POINCARE THEOREM ,
PROTOCLUSTERS ,
RELAXATION TIME ,
TIDAL DISRUPTION ,
TIDAL RADIUS ,
VELOCITY DISPERSION ,
VELOCITY DISTRIBUTION ,
VIRIAL THEOREM
 
STAR COUNTS      (StarCounts)
GALACTIC STRUCTURE ,
MASS FUNCTION ,
STAR DISTRIBUTION ,
STATISTICS
 
STAR DISTRIBUTION      (StarDistribution)
STAR COUNTS ,
SURVEYS
 
STAR FORMATION      (StarFormation)
formation of stars ,
star origin 		BIRTH RATES ,
BOK GLOBULES ,
COOLING FLOWS ,
DARK NEBULAE ,
EXTRASOLAR PLANETS ,
INFRARED SOURCES ,
JEANS LENGTH ,
PREMAINSEQUENCE STARS ,
PROTOSTARS ,
STARBURST GALAXIES ,
STELLAR EVOLUTION ,
STELLAR RINGS
 
STARK BROADENING      (StarkBroadening)
LINE BROADENING DOPPLER BROADENING ,
NATURAL LINE WIDTH ,
ZEEMAN SPLITTING
 
STARS      (Stars)
SUN
Combine STAR or STELLAR with other terms.
 
STARSPOTS      (Starspots)
BY DRACONIS STARS ,
RS CANUM VENATICORUM STARS ,
SUNSPOTS
 
STATISTICAL PARALLAX      (StatisticalParallax)
PARALLAXES
 
  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Descriptionaltbroadernarrowerrelated
STATISTICS      (Statistics)
DISTRIBUTION FUNCTION ,
MONTE CARLO TECHNIQUES ,
RADIO SOURCE COUNTS ,
SELECTION EFFECTS ,
STAR COUNTS
Combine with other terms
 
STEADY STATE THEORY      (SteadyStateTheory)
COSMOLOGY BIG BANG THEORY ,
CLOSED UNIVERSE ,
OPEN UNIVERSE
 
STELLAR      (Stellar)
See SN for STARS.
 
STELLAR ATMOSPHERES      (StellarAtmospheres)
ATMOSPHERES SOLAR ATMOSPHERE CHROMOSPHERE ,
CORONAS ,
DREDGE UP ,
LIMB BRIGHTENING ,
LIMB DARKENING ,
LINE BROADENING ,
LINE FORMATION ,
LINE WIDTHS ,
NEGATIVE H ION ,
SCALE HEIGHT ,
STELLAR STRUCTURE ,
STELLAR WINDS ,
TURBULENCE [STAR ATMOSPHERE]
 
STELLAR DYNAMICS      (StellarDynamics)
CLOSE ENCOUNTERS ,
ENCOUNTERS ,
FOKKER PLANCK EQUATION ,
GALACTIC ROTATION ,
N BODY PROBLEM ,
POINCARE THEOREM ,
PROPER MOTIONS ,
RADIAL VELOCITY ,
RELAXATION TIME ,
STELLAR MOTIONS ,
THREE BODY PROBLEM ,
TWO BODY PROBLEM
 
STELLAR EVOLUTION      (StellarEvolution)
star origin EVOLUTION BIRTH RATES ,
CARBON BURNING ,
CHEMICAL EVOLUTION ,
COLLAPSED STARS ,
COSMOLOGY ,
e PROCESS ,
EVOLUTIONARY TRACKS ,
FUNNELING ,
GIANT STARS ,
GRAVITATIONAL EQUILIBRIUM ,
HELIUM BURNING ,
HENYEY TRACK ,
HERTZSPRUNG RUSSELL DIAGRAM ,
HYDROGEN BURNING ,
INITIAL MASS FUNCTION ,
INNER CORE ,
INSTABILITY STRIP ,
KERR BLACK HOLE ,
LUMINOSITY FUNCTION ,
MASS LOSS ,
PROTOSTARS ,
SOLAR INTERIOR ,
STAR FORMATION ,
STARBURST GALAXIES ,
STELLAR INTERIORS
 
STELLAR INTERIORS      (StellarInteriors)
SOLAR INTERIOR CARBON BURNING ,
CARBON NITROGEN CYCLE ,
CHANDRASEKHAR SCHONBERG LIMIT ,
CORES ,
DREDGE UP ,
EDDINGTON LIMIT ,
GRAVITY WAVES ,
HELIUM BURNING ,
HYDROGEN BURNING ,
INNER CORE ,
NUCLEAR FUSION ,
NUCLEOSYNTHESIS ,
OXYGEN BURNING ,
PROTON PROTON REACTION ,
ROSSELAND OPACITY ,
STELLAR EVOLUTION ,
STELLAR STRUCTURE ,
TEMPERATURE ZONES
 
STELLAR MOTIONS      (StellarMotions)
MOTION ASTROMETRY ,
DOPPLER EFFECT ,
LOCAL STANDARD OF REST ,
PECULIAR MOTIONS ,
PECULIAR VELOCITY ,
PROPER MOTIONS ,
RADIAL VELOCITY ,
SPACE MOTION ,
STELLAR DYNAMICS
 
STELLAR OSCILLATIONS      (StellarOscillations)
SOLAR OSCILLATIONS ASTEROSEISMOLOGY ,
SEISMOLOGY
 
STELLAR POPULATIONS      (StellarPopulations)
DISK POPULATION ,
HALO STARS ,
INTERMEDIATE POPULATION STARS ,
POPULATION I STARS ,
POPULATION II STARS
 
  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Descriptionaltbroadernarrowerrelated
STELLAR RINGS      (StellarRings)
RINGS STAR FORMATION
 
STELLAR STRUCTURE      (StellarStructure)
HYDROSTATIC EQUILIBRIUM ,
MACROTURBULENCE ,
MODELS ,
POLYTROPES ,
SOLAR INTERIOR ,
STELLAR ATMOSPHERES ,
STELLAR INTERIORS
 
STELLAR WINDS      (StellarWinds)
PLASMAS SOLAR WIND ACCRETION DISKS ,
CHROMOSPHERE ,
CIRCUMSTELLAR SHELLS ,
INTERSTELLAR WINDS ,
MASS LOSS ,
POYNTING ROBERTSON EFFECT ,
RADIATION PRESSURE ,
SHOCKS ,
STELLAR ATMOSPHERES
 
STIMULATED EMISSION      (StimulatedEmission)
LASERS ,
MASERS ,
POPULATION INVERSION ,
SPECTRA ,
STIMULATED RADIATION
 
STIMULATED RADIATION      (StimulatedRadiation)
STIMULATED EMISSION
 
STOKES PARAMETERS      (StokesParameters)
POLARIZATION [WAVES] ,
POLARIZED RADIATION
 
STRATOPAUSE      (Stratopause)
EARTH ATMOSPHERE ,
MESOSPHERE ,
STRATOSPHERE
 
STRATOSPHERE      (Stratosphere)
EARTH ATMOSPHERE ,
STRATOPAUSE ,
TROPOPAUSE
 
STREAK PHOTOGRAPHY      (StreakPhotography)
PHOTOGRAPHY
 
STREAMERS      (Streamers)
COMETS ,
TAILS
 
  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Descriptionaltbroadernarrowerrelated
STROBOSCOPES      (Stroboscopes)
INSTRUMENTATION
 
STROMGREN PHOTOMETRY      (StromgrenPhotometry)
four color photometry ,
uvby system 		MEDIUM BAND PHOTOMETRY ,
PHOTOMETRIC SYSTEMS 		E REGIONS ,
F REGIONS ,
H BETA PHOTOMETRY ,
KAPTEYN SELECTED AREAS
 
STROMGREN SPHERE      (StromgrenSphere)
GASEOUS SPHERES INTERSTELLAR MATTER ,
IONIZATION ,
IONIZED GASES
 
STRONG INTERACTIONS      (StrongInteractions)
INTERACTIONS NUCLEAR PHYSICS ,
WEAK INTERACTIONS
Between atomic particles
 
STRONTIUM STARS      (StrontiumStars)
MAGNETIC STARS
 
STRUCTURE      (Structure)
PLANETS
Combine with other terms
 
SUBDWARF STARS      (SubdwarfStars)
SUBLUMINOUS STARS A SUBDWARF STARS ,
B SUBDWARF STARS ,
F SUBDWARF STARS ,
G SUBDWARF STARS ,
K SUBDWARF STARS ,
M SUBDWARF STARS ,
O SUBDWARF STARS 		DWARF STARS ,
HARMAN SEATON SEQUENCE
 
SUBGIANT STARS      (SubgiantStars)
POSTMAINSEQUENCE STARS A SUBGIANT STARS ,
F SUBGIANT STARS ,
G SUBGIANT STARS ,
K SUBGIANT STARS ,
M SUBGIANT STARS 		LUMINOSITY CLASSIFICATION
 
SUBLUMINOUS STARS      (SubluminousStars)
DEGENERATE STARS ,
SUBDWARF STARS 		POPULATION II STARS
 
SUBMILLIMETER ASTRONOMY      (SubmillimeterAstronomy)
RADIO ASTRONOMY MILLIMETER ASTRONOMY ,
RADIO OBSERVATORIES ,
SUBMILLIMETER WAVES
 
  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Descriptionaltbroadernarrowerrelated
SUBMILLIMETER WAVES      (SubmillimeterWaves)
SUBMILLIMETER ASTRONOMY
 
SUBREFLECTORS      (Subreflectors)
CASSEGRAIN ANTENNAS ,
CASSEGRAIN FOCUS ,
RADIO TELESCOPES ,
SECONDARY MIRRORS
 
SUMMER SOLSTICE      (SummerSolstice)
SOLSTICES TROPIC OF CANCER ,
WINTER SOLSTICE
 
SUN      (Sun)
STARS BAILYS BEADS ,
CHROMOSPHERE ,
DIAMOND RING EFFECT ,
FILAMENTS [SOLAR] ,
FLARES ,
FRAUNHOFER LINES ,
GRANULATION ,
GRANULES ,
HANLE EFFECT ,
LOCAL STANDARD OF REST ,
LUNAR ECLIPSE ,
MACRO SPICULES ,
MOTTLES ,
PHOTOSPHERE ,
PROMINENCES ,
QUIESCENT PROMINENCES ,
SOLAR CONSTANT ,
SOLAR CORONA ,
SOLAR ECLIPSE ,
SOLAR PHYSICS ,
SOLAR PLANETARY RELATIONS ,
SOLAR SURFACE ,
SOLAR SYSTEM ,
SOLAR TERRESTRIAL RELATIONS ,
SPICULES
Combine SUN or SOLAR with other terms. Not a complete list of terms.
 
SUNLIGHT      (Sunlight)
SKY BRIGHTNESS ,
SOLAR CONSTANT ,
TWILIGHT
 
SUNSPOT CYCLE      (SunspotCycle)
BUTTERFLY DIAGRAM ,
MAUNDER MINIMUM ,
SOLAR ACTIVITY ,
SOLAR CYCLE ,
SUNSPOTS
 
SUNSPOT GROUPS      (SunspotGroups)
BIPOLAR GROUPS SOLAR ACTIVITY ,
SUNSPOT NUMBERS
 
SUNSPOT NUMBERS      (SunspotNumbers)
relative sunspot number ,
wolf number 		BUTTERFLY DIAGRAM ,
MAUNDER MINIMUM ,
SOLAR ACTIVITY ,
SOLAR CYCLE ,
SUNSPOT GROUPS
 
SUNSPOTS      (Sunspots)
ACTIVE SUN ,
BIPOLAR GROUPS ,
BUTTERFLY DIAGRAM ,
EVERSHED EFFECT ,
FILAMENTS [SOLAR] ,
MAGNETIC FIELDS ,
MAGNETIC STORMS ,
PENUMBRA ,
PLAGES ,
PROMINENCES ,
SOLAR ACTIVITY ,
STARSPOTS ,
SUNSPOT CYCLE ,
UMBRA ,
WILSON EFFECT
 
SUNYAEV ZELDOVICH EFFECT      (SunyaevZeldovichEffect)
BACKGROUND RADIATION ,
CLUSTERS OF GALAXIES ,
INTRACLUSTER MATTER ,
MICROWAVE BACKGROUND ,
X RAY EMISSION
 
  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Descriptionaltbroadernarrowerrelated
SUPERCLUSTERS      (Superclusters)
CLUSTERS OF GALAXIES
 
SUPERGIANT STARS      (SupergiantStars)
HIGH LUMINOSITY STARS ,
POSTMAINSEQUENCE STARS 		A SUPERGIANT STARS ,
B SUPERGIANT STARS ,
EARLY TYPE SUPERGIANT STARS ,
F SUPERGIANT STARS ,
G SUPERGIANT STARS ,
K SUPERGIANT STARS ,
LATE TYPE SUPERGIANT STARS ,
O SUPERGIANT STARS 		HUBBLE SANDAGE VARIABLE STARS ,
HYPERGIANT STARS ,
IRREGULAR VARIABLE STARS ,
Lc VARIABLE STARS ,
R CORONAE BOREALIS STARS ,
SEMIREGULAR VARIABLE STARS ,
SUPERMASSIVE STARS
 
SUPERGRANULATION      (Supergranulation)
GRANULATION SOLAR SURFACE
 
SUPERMASSIVE STARS      (SupermassiveStars)
MASSIVE STARS ,
SUPERGIANT STARS
 
SUPERNOVA ENVELOPES      (SupernovaEnvelopes)
SHOCK WAVES ,
SUPERNOVAS
 
SUPERNOVA REMNANTS      (SupernovaRemnants)
BLACK HOLES ,
NEUTRON STARS ,
PULSARS ,
RADIO SOURCES ,
WHITE DWARF STARS ,
WHITE HOLES ,
X RAY SOURCES
 
SUPERNOVAS      (Supernovas)
presupernovas CATACLYSMIC VARIABLE STARS ,
HIGH LUMINOSITY STARS 		e PROCESS ,
FROZEN IN ELEMENTS ,
GRAVITATIONAL COLLAPSE ,
MASS LOSS ,
NEUTRINOS ,
NOVAS ,
NUCLEAR FUSION ,
NUCLEOSYNTHESIS ,
OPIK THEORY ,
OPTICAL OUTBURSTS ,
p PROCESS ,
PROGENITORS ,
PULSARS ,
r PROCESS ,
RUNAWAY STARS ,
s PROCESS ,
SHOCKS ,
SUPERNOVA ENVELOPES ,
SUPPORT SYSTEMS
 
SUPPORT SYSTEMS      (SupportSystems)
INSTRUMENTATION ,
SUPERNOVAS ,
TELESCOPES
Combine with other terms
 
SURFACE BRIGHTNESS      (SurfaceBrightness)
BRIGHTNESS GRAVITY DARKENING ,
PHOTOSPHERE ,
SURFACE PHOTOMETRY ,
TEMPERATURE ,
VON ZEIPEL THEOREM
 
SURFACE GRAVITY      (SurfaceGravity)
acceleration of gravity DIAMETERS ,
GRAVITATIONAL FORCE ,
GRAVITY DARKENING ,
LINE WIDTHS ,
LUMINOSITY ,
LUMINOSITY CLASSIFICATION ,
MASS
 
  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Descriptionaltbroadernarrowerrelated
SURFACE PHOTOMETRY      (SurfacePhotometry)
area photometry PHOTOMETRY DRIFT SCANS ,
GALAXIES ,
ISOPHOTES ,
NEBULAE ,
SURFACE BRIGHTNESS
 
SURFACE PROPERTIES      (SurfaceProperties)
PROPERTIES ALBEDO
Combine with other terms
 
SURFACES [CELESTIAL BODIES]      (SurfacesCelestialBodies)
DUST STORMS ,
GEOLOGY ,
LUNAR DOMES ,
MARIA ,
MOON ,
PETROLOGY ,
PHOTOSPHERE ,
PLANETS ,
SATELLITES ,
TOPOGRAPHY ,
VOLATILES ,
VOLCANOES ,
WATER ICE
 
SURFACES [OPTICAL]      (SurfacesOptical)
ALUMINUM COATINGS ,
ANTIREFLECTION COATINGS ,
FIGURING ,
LENSES ,
MIRRORS ,
POLISHING ,
SILVER COATINGS ,
THIN FILMS
 
SURVEYS      (Surveys)
SKY SURVEYS ,
ULTRAVIOLET SURVEYS ,
X RAY SURVEYS 		ATLASES ,
CATALOGS ,
RADIO SOURCE COUNTS ,
STAR DISTRIBUTION
 
SU URSAE MAJORIS STARS      (SuUrsaeMajorisStars)
CATACLYSMIC VARIABLE STARS ,
ERUPTIVE BINARY STARS ,
U GEMINORUM STARS 		SS CYGNI STARS ,
UX URSAE MAJORIS STARS ,
WZ SAGITTAE STARS ,
Z CAMELOPARDALIS STARS
 
S VULPECULAE STARS      (SVulpeculaeStars)
LONG PERIOD VARIABLE STARS ,
PULSATING VARIABLE STARS ,
SEMIREGULAR VARIABLE STARS 		MIRA VARIABLE STARS ,
RV TAURI STARS
 
SWAN BANDS      (SwanBands)
MOLECULAR BANDS CARBON MONOXIDE ,
MOLECULAR SPECTRA
 
SX ARIETIS STARS      (SxArietisStars)
helium variable stars ALPHA2 CANUM VENATICORUM STARS ,
CATACLYSMIC VARIABLE STARS ,
EARLY TYPE VARIABLE STARS ,
ERUPTIVE BINARY STARS ,
MAGNETIC VARIABLE STARS ,
U GEMINORUM STARS
 
SX PHOENICIS STARS      (SxPhoenicisStars)
MULTIPERIODIC VARIABLE STARS ,
POPULATION II STARS ,
PULSATING VARIABLE STARS
 
  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Descriptionaltbroadernarrowerrelated
SYMBIOTIC STARS      (SymbioticStars)
symbiotic novas CATACLYSMIC VARIABLE STARS ,
EMISSION LINE STARS ,
ERUPTIVE BINARY STARS 		Z ANDROMEDAE STARS DUST SHELLS ,
P CYGNI LINE PROFILES ,
X RAY BINARY STARS
 
SYMBOLS      (Symbols)
UNITS
 
SYNCHRONOUS DETECTORS      (SynchronousDetectors)
DETECTORS
 
SYNCHRONOUS ROTATION      (SynchronousRotation)
ROTATION CLOSE BINARY STARS ,
ORBITS ,
ROTATING STARS
 
SYNCHROTRON RADIATION      (SynchrotronRadiation)
RADIATION CYCLOTRON RADIATION ,
GYROSYNCHROTRON RADIATION 		BREMSSTRAHLUNG ,
MAGNETOHYDRODYNAMICS ,
NONTHERMAL SOURCES ,
RADIATION MECHANISMS ,
RAZIN EFFECT ,
RELATIVISTIC ELECTRONS
 
SYNODIC PERIOD      (SynodicPeriod)
CONJUNCTION ,
OPPOSITION ,
PLANETS ,
SOLAR SYSTEM ,
SYZYGY
 
SYSTEMS      (Systems)
Combine with other terms
 
SYZYGY      (Syzygy)
CONJUNCTION ,
OPPOSITION ,
PLANETS ,
SYNODIC PERIOD
Conjunction or opposition of planets.
 
Thu Jul 3 15:11:37 2008