| 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 |
|---|---|---|---|---|
| HADRON BARRIER (HadronBarrier) | ||||
| BIG BANG THEORY | ||||
| 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 |
| HADRONS (Hadrons) | ||||
| ELEMENTARY PARTICLES | BOSONS | |||
| HALATION (Halation) | ||||
|
IMAGES
, PHOTOGRAPHIC EMULSIONS , TURBIDITY |
||||
| HALF WAVE DIPOLES (HalfWaveDipoles) | ||||
| DIPOLES |
RADIO TELESCOPES
, YAGI ANTENNAS |
|||
| HALOS (Halos) | ||||
| GALACTIC HALO |
COMETS
, CORONAS , GALAXIES , HALO STARS , LIGHT SCATTERING |
|||
| HALO STARS (HaloStars) | ||||
| POPULATION II STARS |
GALACTIC HALO
, GLOBULAR STAR CLUSTERS , HALOS , STELLAR POPULATIONS |
|||
| H ALPHA (HAlpha) | ||||
| RESONANCE LINES | BALMER SERIES | |||
| H ALPHA EMISSION LINE STARS (HAlphaEmissionLineStars) | ||||
|
RW AURIGAE STARS
, T ASSOCIATIONS , VARIABLE STARS |
||||
| H ALPHA PHOTOMETRY (HAlphaPhotometry) | ||||
| NARROW BAND PHOTOMETRY | ||||
| H AND K LINES (HAndKLines) | ||||
| CALCIUM LINES |
H LINE
, K LINE |
|||
| HANLE EFFECT (HanleEffect) | ||||
|
PROMINENCES
, 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 | ||||
| Description | alt | broader | narrower | related |
| HARMAN SEATON SEQUENCE (HarmanSeatonSequence) | ||||
|
HERTZSPRUNG RUSSELL DIAGRAM
, PLANETARY NEBULAE , SUBDWARF STARS |
||||
| HARMONIC FREQUENCIES (HarmonicFrequencies) | ||||
|
harmonic overtones
, harmonics |
FOURIER ANALYSIS
, FOURIER COMPONENTS , FUNDAMENTAL FREQUENCY , OVERTONE FREQUENCIES |
|||
| Refers only to Fourier components of non-sinusoidal waves. See also OVERTONE FREQUENCIES. | ||||
| HARO GALAXIES (HaroGalaxies) | ||||
| GALAXIES | EMISSION LINE GALAXIES | |||
| HARTMANN TEST (HartmannTest) | ||||
|
FIGURING
, IMAGES , OPTICAL INSTRUMENTS |
||||
| HAWKING RADIATION (HawkingRadiation) | ||||
|
BLACK HOLES
, EVENT HORIZON |
||||
| HAYASHI TRACK (HayashiTrack) | ||||
| EVOLUTIONARY TRACKS |
CONVECTION
, HERTZSPRUNG RUSSELL DIAGRAM |
|||
| H BETA (HBeta) | ||||
| BALMER SERIES | ||||
| H BETA PHOTOMETRY (HBetaPhotometry) | ||||
| NARROW BAND PHOTOMETRY | STROMGREN PHOTOMETRY | |||
| HD CURVE (HdCurve) | ||||
| PHOTOGRAPHY | ||||
| Hurter and Driffield curve. | ||||
| HEAD TAIL GALAXIES (HeadTailGalaxies) | ||||
|
GALAXIES
, RADIO GALAXIES , RADIO SOURCES |
RADIO STRUCTURE
, 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 | ||||
| Description | alt | broader | narrower | related |
| HEAVY ELEMENTS (HeavyElements) | ||||
| CHEMICAL ELEMENTS | ABUNDANCE | |||
| HEAVY METAL STARS (HeavyMetalStars) | ||||
|
LATE TYPE GIANT STARS
, PECULIAR STARS |
BARIUM STARS
, S STARS , ZIRCONIUM STARS |
|||
| HE+ IONIZATION ZONE (HeIonizationZone) | ||||
|
CEPHEIDS
, DELTA SCUTI STARS , KAPPA MECHANISM , PULSATING VARIABLE STARS , PULSATION THEORY , RADIAL PULSATIONS , VARIABLE STARS , ZZ CETI STARS |
||||
| HELIOCENTRIC CORRECTION (HeliocentricCorrection) | ||||
|
ASTRONOMICAL UNIT
, COORDINATE SYSTEMS , HELIOCENTRIC JULIAN DATE , HELIOCENTRIC VELOCITY |
||||
| Correction of velocities and times to the sun's position. | ||||
| HELIOCENTRIC JULIAN DATE (HeliocentricJulianDate) | ||||
| hjd | JULIAN DATE | HELIOCENTRIC CORRECTION | ||
| HELIOCENTRIC ORBITS (HeliocentricOrbits) | ||||
| ORBITS | ||||
| HELIOCENTRIC VELOCITY (HeliocentricVelocity) | ||||
| VELOCITY | HELIOCENTRIC CORRECTION | |||
| heliographs (heliographs) | ||||
| HELIOMETERS (Heliometers) | ||||
| MEASURING INSTRUMENTS | ||||
| HELIOPAUSE (Heliopause) | ||||
|
SOLAR ATMOSPHERE
, SOLAR WIND |
||||
| 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 |
| HELIOSEISMOLOGY (Helioseismology) | ||||
| solar seismology |
ASTEROSEISMOLOGY
, SEISMOLOGY |
SOLAR OSCILLATIONS | ||
| See SOLAR SEISMOLOGY | ||||
| HELIOSPHERE (Heliosphere) | ||||
|
INTERPLANETARY MATTER
, INTERSTELLAR GAS , SOLAR ACTIVITY , SOLAR ATMOSPHERE , SOLAR WIND |
||||
| HELIOSTATS (Heliostats) | ||||
| COELOSTATS |
SIDEROSTATS
, SOLAR TELESCOPES , TELESCOPE MOUNTINGS |
|||
| HELIUM BURNING (HeliumBurning) | ||||
|
NUCLEAR FUSION
, NUCLEOSYNTHESIS |
CARBON BURNING
, HELIUM FLASH , HELIUM SHELL FLASH , HYDROGEN BURNING , INNER CORE , OXYGEN BURNING , SHELL BURNING , SILICON BURNING , STELLAR EVOLUTION , STELLAR INTERIORS |
|||
| HELIUM FLASH (HeliumFlash) | ||||
| helium detonation |
CARBON FLASH
, HELIUM BURNING , HELIUM SHELL FLASH , NUCLEAR FUSION , RED GIANT TIP |
|||
| HELIUM POOR STARS (HeliumPoorStars) | ||||
| Bw STARS |
ABUNDANCE
, METAL ABUNDANCE |
|||
| HELIUM RICH STARS (HeliumRichStars) | ||||
|
ABUNDANCE
, METAL ABUNDANCE |
||||
| HELIUM SHELL FLASH (HeliumShellFlash) | ||||
|
HELIUM BURNING
, HELIUM FLASH , NUCLEAR FUSION |
||||
| HELMHOLTZ KELVIN CONTRACTION (HelmholtzKelvinContraction) | ||||
| kelvin helmholtz contraction | KELVIN TIMESCALE | |||
| HENRY DRAPER CATALOG (HenryDraperCatalog) | ||||
| CATALOGS |
HENRY DRAPER SYSTEM
, SPECTRAL CLASSIFICATION |
|||
| 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 |
| HENRY DRAPER SYSTEM (HenryDraperSystem) | ||||
|
harvard classification
, hd system |
SPECTRAL CLASSIFICATION | HENRY DRAPER CATALOG | ||
| HENYEY TRACK (HenyeyTrack) | ||||
| EVOLUTIONARY TRACKS |
HERTZSPRUNG RUSSELL DIAGRAM
, STELLAR EVOLUTION |
|||
| HERBIG HARO OBJECTS (HerbigHaroObjects) | ||||
| hh objects |
EMISSION LINE OBJECTS
, EMISSION NEBULAE , INFRARED SOURCES , INTRINSIC VARIABLE STARS , PREMAINSEQUENCE STARS |
PROTOSTARS
, T ASSOCIATIONS , T TAURI STARS |
||
| HERTZSPRUNG GAP (HertzsprungGap) | ||||
|
GIANT BRANCH
, HERTZSPRUNG RUSSELL DIAGRAM |
||||
| HERTZSPRUNG RUSSELL DIAGRAM (HertzsprungRussellDiagram) | ||||
| hr diagram |
ABSOLUTE MAGNITUDE
, ASYMPTOTIC GIANT BRANCH , COLOR LUMINOSITY RELATION , COLOR MAGNITUDE RELATION , EVOLUTIONARY TRACKS , GIANT BRANCH , HARMAN SEATON SEQUENCE , HAYASHI TRACK , HENYEY TRACK , HERTZSPRUNG GAP , HESS DIAGRAM , INSTABILITY STRIP , LUMINOSITY , MAINSEQUENCE , RED GIANT TIP , SPECTRA , STELLAR EVOLUTION , TURNOFF POINT , ZERO AGE HORIZONTAL BRANCH , ZERO AGE MAINSEQUENCE |
|||
| HESS DIAGRAM (HessDiagram) | ||||
|
FREQUENCY DISTRIBUTION
, HERTZSPRUNG RUSSELL DIAGRAM |
||||
| HETERODYNE (Heterodyne) | ||||
|
INTERFEROMETERS
, SPECTROSCOPY |
||||
| Combine with other terms | ||||
| H I ABSORPTION (HIAbsorption) | ||||
|
21 CM LINE
, H I CLOUDS |
||||
| H I CLOUDS (HIClouds) | ||||
|
21 CM LINE
, H I ABSORPTION |
||||
| H I CONTENT (HIContent) | ||||
| 21 CM LINE | ||||
| 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 |
| H I EMISSION (HIEmission) | ||||
| 21 CM LINE | ||||
| HIERARCHICAL COSMOLOGY (HierarchicalCosmology) | ||||
| COSMOLOGY | ||||
| HIGH ENERGY ASTROPHYSICS (HighEnergyAstrophysics) | ||||
| high energy processes |
COSMIC RAY ASTRONOMY
, INVERSE COMPTON EFFECT , NUCLEAR ASTROPHYSICS , PARTICLE BEAMS |
|||
| HIGH ENERGY RADIATION (HighEnergyRadiation) | ||||
| RADIATION |
COSMIC RAYS
, GAMMA RAYS , X RAYS |
X RAY LUMINOSITY | ||
| HIGH LUMINOSITY STARS (HighLuminosityStars) | ||||
|
luminous stars
, bright stars |
LUMINOUS BLUE VARIABLE STARS
, NOVAS , SUPERGIANT STARS , SUPERNOVAS |
|||
| HIGH RESOLUTION SPECTRA (HighResolutionSpectra) | ||||
| high dispersion spectra |
COUDE SPECTRA
, ECHELLE SPECTRA |
COUDE SPECTROGRAPHS
, ECHELLE SPECTROGRAPHS |
||
| HIGH RESOLUTION SPECTROSOPY (HighResolutionSpectrosopy) | ||||
| high dispersion spectroscopy | SPECTROSCOPY |
COUDE SPECTROGRAPHS
, ECHELLE SPECTROGRAPHS |
||
| HIGH SPEED PHOTOMETERS (HighSpeedPhotometers) | ||||
| PHOTOMETERS |
TIME RESOLVED SPECTROSCOPY
, VARIABLE STARS |
|||
| HIGH TEMPERATURE (HighTemperature) | ||||
| hot | ||||
| Combine with other terms | ||||
| HIGH VELOCITY CLOUDS (HighVelocityClouds) | ||||
|
GALACTIC ROTATION
, HIGH VELOCITY STARS , MILKY WAY GALAXY , VELOCITY |
||||
| 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 |
| HIGH VELOCITY STARS (HighVelocityStars) | ||||
|
GALACTIC ROTATION
, HIGH VELOCITY CLOUDS , MILKY WAY GALAXY , ORBITS , RUNAWAY STARS , VELOCITY |
||||
| H II REGIONS (HIiRegions) | ||||
|
EMISSION LINE OBJECTS
, EMISSION NEBULAE , INTERSTELLAR MATTER |
COMPACT H II REGIONS |
BOK GLOBULES
, EMISSION LINE GALAXIES , EMISSION LINES , EXCITING STARS , FARADAY EFFECT , NEBULAE , PLASMAS , RADIO RECOMBINATION LINES , YOUNG STARS |
||
| HIRAYAMA FAMILIES (HirayamaFamilies) | ||||
| MINOR PLANET FAMILIES | APOLLO GROUP | |||
| H I REGIONS (HIRegions) | ||||
| INTERSTELLAR MATTER |
21 CM LINE
, NEUTRAL GASES , RADIO ABSORPTION , RADIO RECOMBINATION LINES |
|||
| HISTORY OF ASTRONOMY (HistoryOfAstronomy) | ||||
| ARCHAEOASTRONOMY | ||||
| Combine with other terms | ||||
| H LINE (HLine) | ||||
|
FRAUNHOFER LINES
, H AND K LINES |
K LINE | |||
| H MAGNITUDE (HMagnitude) | ||||
| APPARENT MAGNITUDES |
INFRARED PHOTOMETRY
, NEAR INFRARED RADIATION |
|||
| HOLMBERG RADIUS (HolmbergRadius) | ||||
| GALAXIES | ||||
| HOLMIUM STARS (HolmiumStars) | ||||
|
Ap STARS
, PECULIAR STARS |
||||
| HOLTSMARK APPROXIMATION (HoltsmarkApproximation) | ||||
| PLASMAS | ||||
| 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 |
| HORIZON (Horizon) | ||||
|
ALTITUDE [ANGLE]
, AZIMUTH , CELESTIAL SPHERE , HORIZON COORDINATE SYSTEM |
||||
| HORIZON COORDINATE SYSTEM (HorizonCoordinateSystem) | ||||
| COORDINATE SYSTEMS |
ALTAZIMUTH MOUNTING
, ALTITUDE [ANGLE] , AZIMUTH , HORIZON , NADIR , ZENITH |
|||
| HORIZONTAL BRANCH STARS (HorizontalBranchStars) | ||||
|
EVOLVED STARS
, POPULATION II STARS |
GIANT BRANCH STARS
, GLOBULAR STAR CLUSTERS , RR LYRAE STARS |
|||
| HORIZONTAL PARALLAX (HorizontalParallax) | ||||
| DIURNAL PARALLAX | ||||
| HORN ANTENNAS (HornAntennas) | ||||
|
ANTENNAS
, RADIO WAVEGUIDES |
FEED HORNS | |||
| HORSESHOE MOUNTING (HorseshoeMounting) | ||||
| EQUATORIAL MOUNTING | ||||
| HOUR ANGLE (HourAngle) | ||||
|
RIGHT ASCENSION
, SIDEREAL TIME , TRANSIT TIME |
||||
| HUBBLE CLASSIFICATION (HubbleClassification) | ||||
| hubble sequence | GALAXIES | |||
| HUBBLE CONSTANT (HubbleConstant) | ||||
|
COSMOLOGICAL DISTANCE SCALE
, COSMOLOGY , HUBBLE TIME , REDSHIFT MAGNITUDE RELATION |
||||
| HUBBLE DIAGRAM (HubbleDiagram) | ||||
|
COSMOLOGY
, GALAXIES , REDSHIFT , REDSHIFT MAGNITUDE RELATION |
||||
| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
| Description | alt | broader | narrower | related |
| HUBBLE LAW (HubbleLaw) | ||||
|
COSMOLOGY
, OBSERVATIONAL COSMOLOGY , REDSHIFT , REDSHIFT MAGNITUDE RELATION |
||||
| HUBBLE RADIUS (HubbleRadius) | ||||
|
BIG BANG THEORY
, COSMOLOGY |
||||
| HUBBLE SANDAGE VARIABLE STARS (HubbleSandageVariableStars) | ||||
| h s variable stars | SUPERGIANT STARS | |||
| HUBBLE TIME (HubbleTime) | ||||
|
AGE
, BIG BANG THEORY , COSMOLOGY , HUBBLE CONSTANT |
||||
| HYDROCARBONS (Hydrocarbons) | ||||
|
CH
, ETHANE , ETHYLENE , POLYCYCLIC HYDROCARBON |
||||
| HYDRODYNAMICS (Hydrodynamics) | ||||
| FLUID DYNAMICS |
JETS
, MAGNETOHYDRODYNAMICS |
|||
| HYDROGEN BURNING (HydrogenBurning) | ||||
| NUCLEOSYNTHESIS |
CARBON NITROGEN CYCLE
, PROTON PROTON REACTION |
CARBON BURNING
, CHANDRASEKHAR SCHONBERG LIMIT , HELIUM BURNING , INNER CORE , NUCLEAR FUSION , OXYGEN BURNING , SHELL BURNING , SILICON BURNING , STELLAR EVOLUTION , STELLAR INTERIORS |
||
| HYDROGEN DEFICIENT STARS (HydrogenDeficientStars) | ||||
| AM CANUM VENATICORUM STARS | METAL ABUNDANCE | |||
| HYDROGEN LINES (HydrogenLines) | ||||
| See HYDROGEN SPECTRUM | ||||
| HYDROGEN SPECTRUM (HydrogenSpectrum) | ||||
| SPECTRA |
BALMER CONTINUUM
, BALMER LIMIT , BALMER SERIES , BRACKETT SERIES , LYMAN CONTINUUM , LYMAN SERIES , PASCHEN SERIES , PFUND SERIES |
|||
| 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 |
| HYDROSTATIC EQUILIBRIUM (HydrostaticEquilibrium) | ||||
| STELLAR STRUCTURE | ||||
| HYDROXYL RADICAL (HydroxylRadical) | ||||
| OH radical |
INTERSTELLAR MOLECULES
, IONS , RADICALS |
OH ABSORPTION
, OH CLOUDS , OH EMISSION , OH IR STARS , OH LINES , OH MASERS , OH SOURCES |
||
| Synonym for OH. | ||||
| HYPERBOLIC ORBITS (HyperbolicOrbits) | ||||
| ORBITS |
CIRCULAR ORBITS
, ELLIPTICAL ORBITS , PARABOLIC ORBITS |
|||
| HYPERFINE LINES (HyperfineLines) | ||||
| SPECTRA | ||||
| HYPERGALAXIES (Hypergalaxies) | ||||
| GALAXIES | ||||
| HYPERGIANT STARS (HypergiantStars) | ||||
| SUPERGIANT STARS | ||||
| HYPOTHETICAL PLANETS (HypotheticalPlanets) | ||||
| PLANETS | ||||
| HZ HERCULIS STARS (HzHerculisStars) | ||||
|
LOW MASS STARS
, NEUTRON STARS , X RAY PULSARS |
X RAY BINARY STARS
, X RAY BURSTS |
|||