{
  "Expansion Velocities": "Galaxy_Properties",
  "Atomic Spectra": "Arib_Spectroscopy",
  "Absorption Systems": "Galaxy_Properties",
  "Density": "Cosmology",
  "VLB Interferometry": "Galaxy_Properties",
  "Triple Systems": "Pairs_Clusters",
  "Variable Stars": "Parts_of_Galaxies",
  "Active Galaxies": "Galaxies_Quasars",
  "Cooling": "Pairs_Clusters",
  "Optical Positions": "Optical",
  "Galactic Centers": "Parts_of_Galaxies",
  "Neutral Gases": "Atoms_and_Molecules",
  "Radio Light Curves": "Radio",
  "Infrared Extinction": "Infrared",
  "Pre-Main-Sequence Stars": "Stellar_Population",
  "Infrared Photography": "Infrared",
  "Density Waves": "Galaxy_Properties",
  "Paschen Lines": "Arib_Spectroscopy",
  "Photoionization": "Arib_Spectroscopy",
  "Atlases": "Galaxy_Properties",
  "UV-Excess Stars": "Ulraviolet",
  "H I Regions": "Parts_of_Galaxies",
  "UV Lines": "Ulraviolet",
  "Temperature Fluctuations": "Cosmology",
  "Protoclusters": "Pairs_Clusters",
  "Mg2 Indices": "Galaxy_Properties",
  "Big-Bang Theory": "Cosmology",
  "X-Ray Sources": "X_Rays",
  "Nucleus": "Galaxy_Properties",
  "Ultrahigh Energy": "Arib_Spectroscopy",
  "UV Spectra": "Ulraviolet",
  "Infrared Maps": "Infrared",
  "X-Ray Astronomy": "X_Rays",
  "Supershells": "Parts_of_Galaxies",
  "UV Excesses": "Ulraviolet",
  "Nebulae": "Parts_of_Galaxies",
  "Morphological Types": "Galaxy_Properties",
  "High-Energy Astrophysics": "Cosmology",
  "Cosmic": "Cosmology",
  "Optical Variations": "Optical",
  "Radio Halo": "Radio",
  "Velocity Curves": "Galaxy_Properties",
  "Extragalactic Objects": "Galaxies_Quasars",
  "Luminous Stars": "Stellar_Population",
  "21 cm Line Widths": "Radio",
  "X-Ray Surveys": "X_Rays",
  "Globular Clusters": "Parts_of_Galaxies",
  "Cepheids": "Stellar_Population",
  "Relativistic Electrons": "Galaxy_Properties",
  "Methane": "Atoms_and_Molecules",
  "Origin": "Galaxy_Properties",
  "Diameter": "Galaxy_Properties",
  "Abundances": "Galaxy_Properties",
  "Einstein Rings": "Cosmology",
  "Electron Temperatures": "Arib_Spectroscopy",
  "X-Ray Spectroscopy": "X_Rays",
  "Cosmological Models": "Cosmology",
  "Supermassive Stars": "Stellar_Population",
  "H I Absorption": "Galaxy_Properties",
  "B Stars": "Stellar_Population",
  "VLA Observations": "Galaxy_Properties",
  "RR Lyrae distance": "Large_Scale_Structures",
  "Radial Velocities": "Galaxy_Properties",
  "Nitrogen": "Atoms_and_Molecules",
  "Eclipsing Binary distance": "Large_Scale_Structures",
  "Morphology": "Galaxies_Quasars",
  "Globular Cluster FP distance": "Large_Scale_Structures",
  "Magnetic Fields": "Galaxy_Properties",
  "X-Ray Novae": "X_Rays",
  "Resonances": "Parts_of_Galaxies",
  "Novae": "Stellar_Population",
  "Flux Densities": "Radio",
  "Geneva Photometry": "Optical",
  "Velocity Maps": "Galaxy_Properties",
  "Interacting": "Pairs_Clusters",
  "Extragalactic": "Galaxies_Quasars",
  "Energy Distribution": "Galaxy_Properties",
  "Gas Densities": "Galaxy_Properties",
  "Blue Stragglers": "Stellar_Population",
  "Blue Variables": "Stellar_Population",
  "Sodium": "Atoms_and_Molecules",
  "Spectrophotometry": "Galaxy_Properties",
  "Carbon Monoxide": "Atoms_and_Molecules",
  "Helium-Weak Stars": "Stellar_Population",
  "Cobalt": "Atoms_and_Molecules",
  "Virial Theorem": "Galaxy_Properties",
  "UV Observations": "Ulraviolet",
  "UV Spectropolarimetry": "Ulraviolet",
  "Chromium": "Atoms_and_Molecules",
  "Giants": "Stellar_Population",
  "Nickel": "Atoms_and_Molecules",
  "Dark Clouds": "Parts_of_Galaxies",
  "Gamma-Ray Lines": "Arib_Spectroscopy",
  "Relativity Theory": "Cosmology",
  "Nonthermal Radiation": "Radio",
  "Red Clump distance": "Large_Scale_Structures",
  "Element Abundances": "Cosmology",
  "Infrared Imaging": "Infrared",
  "Accretion Disks": "Parts_of_Galaxies",
  "Optical Depths": "Optical",
  "Hubble Diagrams": "Galaxy_Properties",
  "Gamma-Ray Detectors": "Gamma_Rays",
  "Satellites": "Pairs_Clusters",
  "Rotation Curves": "Galaxy_Properties",
  "Rotation": "Galaxy_Properties",
  "Herbig-Haro Objects": "Stellar_Population",
  "Atomic Carbon": "Atoms_and_Molecules",
  "Surface Brightness": "Galaxy_Properties",
  "White Dwarfs": "Stellar_Population",
  "Velocities": "Galaxy_Properties",
  "Polar Ring Galaxies": "Galaxies_Quasars",
  "Very-Long-Baseline": "Radio",
  "Infrared Radiation": "Infrared",
  "Pairs of Radio Galaxies": "Galaxies_Quasars",
  "Scintillations": "Radio",
  "Cosmology": "Cosmology",
  "Bursts": "Galaxy_Properties",
  "Galactic Halos": "Parts_of_Galaxies",
  "Distance Scale": "Large_Scale_Structures",
  "Distribution": "Galaxy_Properties",
  "Deuterium": "Atoms_and_Molecules",
  "Scintillation": "Radio",
  "Line Broadening": "Arib_Spectroscopy",
  "Standard Stars": "Stellar_Population",
  "Magellanic Stream": "Galaxies_Quasars",
  "Water Vapor": "Atoms_and_Molecules",
  "Redshift-Magnitude Relation": "Galaxy_Properties",
  "Line Identifications": "Arib_Spectroscopy",
  "Gas Density": "Galaxy_Properties",
  "Tidal Effects": "Pairs_Clusters",
  "Intrinsic Variables": "Stellar_Population",
  "Triple Stars": "Stellar_Population",
  "Quasar Counts": "Cosmology",
  "Entropy": "Pairs_Clusters",
  "Motions": "Galaxy_Properties",
  "Thermal Structure": "Cosmology",
  "Hydrogen": "Atoms_and_Molecules",
  "Shock Waves": "Pairs_Clusters",
  "Plasma Instabilities": "Galaxy_Properties",
  "HI Deficiency": "Radio",
  "Spectroscopy": "Galaxy_Properties",
  "Ion Abundances": "Arib_Spectroscopy",
  "Isophotal Maps": "Galaxy_Properties",
  "Optical Outbursts": "Optical",
  "Helium Abundance": "Atoms_and_Molecules",
  "Semiregular": "Stellar_Population",
  "Polarization": "Galaxy_Properties",
  "Spectropolarimetry": "Galaxy_Properties",
  "Infrared Spectra": "Infrared",
  "Planetary Nebula": "Parts_of_Galaxies",
  "Intergalactic Matter": "Intergalactic",
  "Gas Distribution": "Galaxy_Properties",
  "X-Ray Maps": "X_Rays",
  "Large-Scale Structure": "Cosmology",
  "H Alpha Photometry": "Galaxy_Properties",
  "Collapsing Stars": "Stellar_Population",
  "Infrared Polarization": "Infrared",
  "Infrared Spectrophotometry": "Infrared",
  "Late-Type Giants": "Stellar_Population",
  "Relativistic Effects": "Galaxy_Properties",
  "Infrared Polarimetry": "Infrared",
  "Galactic Nuclei": "Parts_of_Galaxies",
  "Neon": "Atoms_and_Molecules",
  "High-Velocity Streams": "Galaxy_Properties",
  "Horizontal Branch distance": "Large_Scale_Structures",
  "RV Tauri Stars": "Stellar_Population",
  "SN II": "Large_Scale_Structures",
  "Kaluza-Klein Theory": "Cosmology",
  "Carbon": "Atoms_and_Molecules",
  "X-Ray Telescopes": "X_Rays",
  "Reddening": "Galaxy_Properties",
  "FU Orionis Stars": "Stellar_Population",
  "Antimatter": "Cosmology",
  "Infrared Surveys": "Infrared",
  "FIR Radiation": "Infrared",
  "Gravitational Deflection": "Cosmology",
  "O Subdwarfs": "Stellar_Population",
  "Radiation Temperature": "Arib_Spectroscopy",
  "Emission Nebulae": "Parts_of_Galaxies",
  "Nomenclature": "Galaxy_Properties",
  "Intergalactic Magnetic Field": "Intergalactic",
  "Disk Galaxies": "Galaxies_Quasars",
  "Mass Exchange": "Galaxy_Properties",
  "Mass": "Galaxy_Properties",
  "Resonance Lines": "Arib_Spectroscopy",
  "Fourier Analysis": "Galaxy_Properties",
  "Radio Telescopes": "Radio",
  "Mergers": "Galaxies_Quasars",
  "Spectral Indices": "Galaxy_Properties",
  "VLA Maps": "Galaxy_Properties",
  "Active Galactic Nuclei": "Galaxies_Quasars",
  "Neutron Stars": "Stellar_Population",
  "Spectral Lines": "Arib_Spectroscopy",
  "Thermal Radiation": "Cosmology",
  "Recombination Lines": "Arib_Spectroscopy",
  "Steady-State Universe": "Cosmology",
  "Bright Giants": "Stellar_Population",
  "X-Ray Bursts": "X_Rays",
  "Radio Variations": "Radio",
  "RR Lyrae Stars": "Stellar_Population",
  "Radio Radiation": "Radio",
  "OH Sources": "Parts_of_Galaxies",
  "Dwarf Irregular Galaxies": "Galaxies_Quasars",
  "Gas Contents": "Galaxy_Properties",
  "Radio Interferometry": "Radio",
  "Bremsstrahlung": "Radio",
  "Horizontal-Branch Stars": "Stellar_Population",
  "X-Ray Clusters": "X_Rays",
  "UV": "Ulraviolet",
  "Broad-Band Photometry": "Galaxy_Properties",
  "Bianchi Models": "Cosmology",
  "Hot Spots": "Galaxy_Properties",
  "Elliptical": "Galaxies_Quasars",
  "Intercloud Matter": "Parts_of_Galaxies",
  "X-Ray Absorption": "X_Rays",
  "Cool Stars": "Stellar_Population",
  "Late-Type Subdwarfs": "Stellar_Population",
  "Late-Type Galaxies": "Galaxies_Quasars",
  "Infrared Brightness": "Infrared",
  "Mass Loss": "Galaxy_Properties",
  "Composition": "Galaxy_Properties",
  "Mira/LPV distance": "Large_Scale_Structures",
  "Imaging(Optical/NIR)": "Galaxy_Properties",
  "Radio Background": "Radio",
  "Sky Surveys": "Galaxy_Properties",
  "Galaxy Groups": "Pairs_Clusters",
  "Multicolor Photometry": "Optical",
  "Intergalactic Space": "Intergalactic",
  "Line Intensities": "Arib_Spectroscopy",
  "Cosmic Strings": "Cosmology",
  "H II Galaxies": "Galaxies_Quasars",
  "Strontium": "Atoms_and_Molecules",
  "Galactic Spurs": "Parts_of_Galaxies",
  "Balmer Decrement": "Arib_Spectroscopy",
  "Molecular Bands": "Arib_Spectroscopy",
  "Optical Identifications": "Optical",
  "Aperture Synthesis": "Radio",
  "Hubble Expansion": "Cosmology",
  "Black Holes": "Parts_of_Galaxies",
  "Sulfur": "Atoms_and_Molecules",
  "Small-Scale Structure": "Large_Scale_Structures",
  "High-Velocity Gas": "Galaxy_Properties",
  "SBF distance": "Large_Scale_Structures",
  "Pairs of Quasars": "Galaxies_Quasars",
  "Grains": "Atoms_and_Molecules",
  "Infrared Lines": "Infrared",
  "Infrared Galaxies": "Galaxies_Quasars",
  "T Tauri Stars": "Stellar_Population",
  "Separations": "Pairs_Clusters",
  "Young Stars": "Stellar_Population",
  "Optical Emission": "Optical",
  "Quasi-Stellar Objects": "Galaxies_Quasars",
  "Escape Velocities": "Galaxy_Properties",
  "Blue Stars": "Stellar_Population",
  "Nonthermal Sources": "Radio",
  "Abundance Gradients": "Galaxy_Properties",
  "Early-Type Supergiants": "Stellar_Population",
  "Brightness Temperatures": "Galaxy_Properties",
  "C-M Relations": "Galaxy_Properties",
  "Radio Spectra": "Radio",
  "X-Ray Binaries": "X_Rays",
  "Variables": "Stellar_Population",
  "Density Perturbations": "Cosmology",
  "Hubble Sequence": "Galaxy_Properties",
  "RS CVn Stars": "Stellar_Population",
  "Star Formation": "Galaxy_Properties",
  "Semiregular Variables": "Stellar_Population",
  "Clusters of Galaxies": "Pairs_Clusters",
  "X-Ray Continuum": "X_Rays",
  "Cosmological Constant": "Cosmology",
  "21 cm Line Fluxes": "Radio",
  "UV Variations": "Ulraviolet",
  "Starburst Galaxies": "Galaxies_Quasars",
  "OH Absorption": "Arib_Spectroscopy",
  "Isotopic Composition": "Arib_Spectroscopy",
  "X-Ray Lines": "X_Rays",
  "F Supergiants": "Stellar_Population",
  "Atomic Processes": "Arib_Spectroscopy",
  "Infrared Bursts": "Infrared",
  "Blue Compact Galaxies": "Galaxies_Quasars",
  "N-Body Simulations": "Pairs_Clusters",
  "Microwave Radiation": "Radio",
  "Molecular Hydrogen": "Atoms_and_Molecules",
  "Infrared Background": "Infrared",
  "H Alpha": "Arib_Spectroscopy",
  "Galaxy Population": "Pairs_Clusters",
  "O Stars": "Stellar_Population",
  "Compton Scattering": "Radio",
  "HI Maps": "Radio",
  "De Sitter Universe": "Cosmology",
  "Radio Flares": "Radio",
  "Gamma-Ray Bursts": "Parts_of_Galaxies",
  "Infrared Photometry": "Infrared",
  "X-Ray Transients": "X_Rays",
  "Red Variables": "Stellar_Population",
  "Radiation Pressure": "Arib_Spectroscopy",
  "Counterparts": "Galaxy_Properties",
  "Dust Grains": "Galaxy_Properties",
  "Molecular Oxygen": "Atoms_and_Molecules",
  "High-Velocity Stars": "Stellar_Population",
  "Correlation Analysis": "Pairs_Clusters",
  "Star-Forming Regions": "Parts_of_Galaxies",
  "Supergiants": "Stellar_Population",
  "Atomic Oxygen": "Atoms_and_Molecules",
  "Sub-MM Spectra": "Radio",
  "Dumbbell Galaxies": "Galaxies_Quasars",
  "K Supergiants": "Stellar_Population",
  "Evolution": "Galaxy_Properties",
  "Ly Alpha Forest": "Intergalactic",
  "Isotopic Abundances": "Arib_Spectroscopy",
  "BL Lacertae Objects": "Galaxies_Quasars",
  "Low-Mass Stars": "Stellar_Population",
  "A Supergiants": "Stellar_Population",
  "Thermal Models": "Cosmology",
  "Balmer Lines": "Arib_Spectroscopy",
  "Cold Dust": "Parts_of_Galaxies",
  "Hubble Law": "Cosmology",
  "H II Regions": "Parts_of_Galaxies",
  "Delta Scuti Stars": "Stellar_Population",
  "Hydrogen Lines": "Arib_Spectroscopy",
  "Photodissociation": "Arib_Spectroscopy",
  "Narrow-Line Regions": "Parts_of_Galaxies",
  "Pairs of Radio Sources": "Galaxies_Quasars",
  "OH Clouds": "Parts_of_Galaxies",
  "Low-Luminosity Galaxies": "Galaxies_Quasars",
  "N-Body Problem": "Pairs_Clusters",
  "Helium Stars": "Stellar_Population",
  "Post-AGB Stars": "Stellar_Population",
  "21 cm Observations": "Radio",
  "Peculiar": "Galaxies_Quasars",
  "Carbon Dioxide": "Atoms_and_Molecules",
  "Microwave Background": "Radio",
  "Spectral Classification": "Arib_Spectroscopy",
  "Pulsar": "Stellar_Population",
  "Curves-of-Growth": "Arib_Spectroscopy",
  "Arakelian Galaxies": "Galaxies_Quasars",
  "Gas-to-Dust Ratios": "Galaxy_Properties",
  "Degenerate Dwarfs": "Stellar_Population",
  "X-Ray Galaxies": "Galaxies_Quasars",
  "Clustering": "Pairs_Clusters",
  "Relativistic Astrophysics": "Cosmology",
  "Statistics": "Cosmology",
  "Soft X Rays": "X_Rays",
  "Tully-Fisher Relation": "Galaxy_Properties",
  "Isolated galaxies": "Galaxies_Quasars",
  "Red Giants": "Stellar_Population",
  "Algol Systems": "Stellar_Population",
  "Infrared Interferometry": "Infrared",
  "Radio Brightness": "Radio",
  "Friedmann Universe": "Cosmology",
  "Superclusters": "Large_Scale_Structures",
  "IR Spectrophotometry": "Arib_Spectroscopy",
  "Peculiar Velocities": "Pairs_Clusters",
  "S Stars": "Stellar_Population",
  "Ejecta": "Galaxy_Properties",
  "Globular Cluster SBF distance": "Large_Scale_Structures",
  "Radio Observations": "Radio",
  "X-Ray Spectra": "X_Rays",
  "Emission Spectra": "Arib_Spectroscopy",
  "Blue Objects": "Stellar_Population",
  "Metal-Poor Stars": "Stellar_Population",
  "Gamma Ray Bursts": "Gamma_Rays",
  "MM Radiation": "Radio",
  "UV Excess": "Ulraviolet",
  "Gamma Rays": "Gamma_Rays",
  "Collapse": "Galaxy_Properties",
  "X-Ray Polarization": "X_Rays",
  "Late-Type Stars": "Stellar_Population",
  "UV Extinction": "Ulraviolet",
  "Globular Cluster Radius distance": "Large_Scale_Structures",
  "Expansion": "Cosmology",
  "Contact Binaries": "Stellar_Population",
  "Pregalactic Stars": "Stellar_Population",
  "Intergalactic Medium": "Intergalactic",
  "Formation": "Galaxy_Properties",
  "Titanium Monoxide": "Atoms_and_Molecules",
  "Filaments": "Large_Scale_Structures",
  "Radio Polarization": "Radio",
  "Oxygen Lines": "Arib_Spectroscopy",
  "Infrared Light Curves": "Infrared",
  "Molecular Clouds": "Parts_of_Galaxies",
  "Brightness Distribution": "Galaxy_Properties",
  "Ionization Structure": "Arib_Spectroscopy",
  "Optical Design": "Optical",
  "Pulsar Magnetospheres": "Stellar_Population",
  "H Beta": "Arib_Spectroscopy",
  "Irregular": "Galaxies_Quasars",
  "Brightness": "Galaxy_Properties",
  "Spiral Structure": "Parts_of_Galaxies",
  "Symbiotic Stars": "Stellar_Population",
  "Photoelectric Photometry": "Optical",
  "Calcium Lines": "Arib_Spectroscopy",
  "Ring Galaxies": "Galaxies_Quasars",
  "Streams": "Galaxy_Properties",
  "DQ Herculis Stars": "Stellar_Population",
  "Deceleration": "Cosmology",
  "Quark Stars": "Stellar_Population",
  "Spectral Types": "Galaxy_Properties",
  "Optical Pulsations": "Optical",
  "M Dwarfs": "Stellar_Population",
  "Galaxy Pairs": "Pairs_Clusters",
  "Optical Polarization": "Optical",
  "O Supergiants": "Stellar_Population",
  "RR Lyrae Variables": "Stellar_Population",
  "Early-Type Galaxies": "Galaxies_Quasars",
  "H I Observations": "Atoms_and_Molecules",
  "Extended Objects": "Galaxy_Properties",
  "UV Spectrographs": "Ulraviolet",
  "Mass-to-Light Ratio": "Galaxy_Properties",
  "Shape": "Galaxy_Properties",
  "Fundamental Constants": "Cosmology",
  "Emission-Line Galaxies": "Galaxies_Quasars",
  "Binary Stars": "Stellar_Population",
  "Alignment": "Large_Scale_Structures",
  "Tidal Interaction": "Pairs_Clusters",
  "Luminosity Distribution": "Galaxy_Properties",
  "Proper-Motion Stars": "Stellar_Population",
  "Elementary Particles": "Cosmology",
  "Virial Masses": "Galaxy_Properties",
  "Infrared Absorption": "Infrared",
  "Gamma-Ray Background": "Gamma_Rays",
  "Radio Identifications": "Galaxies_Quasars",
  "Methylacetylene": "Atoms_and_Molecules",
  "Gas Content": "Galaxy_Properties",
  "UV Colors": "Ulraviolet",
  "Liners": "Galaxies_Quasars",
  "Tully-Fisher distance": "Large_Scale_Structures",
  "Maps": "Galaxy_Properties",
  "Groups of Galaxies": "Pairs_Clusters",
  "Masers": "Parts_of_Galaxies",
  "Stars": "Stellar_Population",
  "Stellar Content": "Galaxy_Properties",
  "Galactic Coronae": "Parts_of_Galaxies",
  "Internal Structure": "Galaxy_Properties",
  "Radio Halos": "Radio",
  "Giant Branch fitting distance": "Large_Scale_Structures",
  "Population I Stars": "Stellar_Population",
  "Emission-Line Objects": "Galaxies_Quasars",
  "Guide Stars": "Stellar_Population",
  "Far-IR Radiation": "Infrared",
  "Heavy Elements": "Atoms_and_Molecules",
  "CH": "Atoms_and_Molecules",
  "Extreme UV Background": "Ulraviolet",
  "Models": "Galaxy_Properties",
  "Reflection Nebulae": "Parts_of_Galaxies",
  "Forbidden Lines": "Arib_Spectroscopy",
  "Dwarf Novae": "Stellar_Population",
  "Gamma-Ray Variations": "Gamma_Rays",
  "Thermal Evolution": "Cosmology",
  "Cosmic Microwave Background": "Cosmology",
  "Galaxy Counts": "Pairs_Clusters",
  "Scandium": "Atoms_and_Molecules",
  "Bridges": "Parts_of_Galaxies",
  "Universe": "Cosmology",
  "Tidal Evolution": "Pairs_Clusters",
  "MM Spectra": "Arib_Spectroscopy",
  "Hydrocarbons": "Atoms_and_Molecules",
  "Fragmentation": "Galaxy_Properties",
  "Accretion Disk": "Parts_of_Galaxies",
  "Narrow-Band Photometry": "Optical",
  "Gamma-Ray Sources": "Gamma_Rays",
  "PNLF distance": "Large_Scale_Structures",
  "Optical Counterparts": "Optical",
  "Polycyclic Hydrocarbons": "Atoms_and_Molecules",
  "Carbon Monosulfide": "Atoms_and_Molecules",
  "CNO Anomalies": "Atoms_and_Molecules",
  "Intercloud Gas": "Parts_of_Galaxies",
  "Infrared Images": "Infrared",
  "Cepheid distance": "Large_Scale_Structures",
  "Peculiar Stars": "Stellar_Population",
  "Surface Photometry (Non-Optical)": "Radio",
  "Instabilities": "Cosmology",
  "W Virginis Stars": "Stellar_Population",
  "Infrared Spectroscopy": "Infrared",
  "Radio Recombination Lines": "Radio",
  "Emission Lines": "Arib_Spectroscopy",
  "Giant Branches": "Parts_of_Galaxies",
  "Field Stars": "Stellar_Population",
  "Orientation": "Galaxy_Properties",
  "Multi-Object Spectroscopy": "Optical",
  "Infrared Colors": "Infrared",
  "H Alpha Surveys": "Galaxy_Properties",
  "Lyman Beta": "Arib_Spectroscopy",
  "UV Spectroscopy": "Ulraviolet",
  "Galaxy Formation": "Pairs_Clusters",
  "Dwarf Spheroidal Galaxies": "Galaxies_Quasars",
  "Zinc": "Atoms_and_Molecules",
  "B Giants": "Stellar_Population",
  "Photometry(UVBRI)": "Optical",
  "Extinction": "Galaxy_Properties",
  "Sub-MM Observations": "Radio",
  "Mass Ejection": "Galaxy_Properties",
  "Background Radiation": "Cosmology",
  "Faint Galaxies": "Galaxies_Quasars",
  "Rotating Stars": "Stellar_Population",
  "Shells": "Parts_of_Galaxies",
  "X-Ray Brightness": "X_Rays",
  "Relativity": "Cosmology",
  "Gaseous Disks": "Galaxy_Properties",
  "Continuum Radiation": "Radio",
  "S Doradus Stars": "Stellar_Population",
  "Extreme UV": "Ulraviolet",
  "Multiwavelength Observations": "Optical",
  "Primeval Galaxies": "Galaxies_Quasars",
  "Kinematics": "Pairs_Clusters",
  "Radio Jets": "Radio",
  "N Galaxies": "Galaxies_Quasars",
  "Dwarf Cepheids": "Stellar_Population",
  "Infrared Excesses": "Infrared",
  "Silicates": "Atoms_and_Molecules",
  "Inclination": "Galaxy_Properties",
  "Subdwarfs": "Stellar_Population",
  "Variability": "Galaxy_Properties",
  "Red Dwarfs": "Stellar_Population",
  "Cocoon Stars": "Stellar_Population",
  "Computer Simulations": "Pairs_Clusters",
  "Data Archives": "Galaxy_Properties",
  "Nova-Like Variables": "Stellar_Population",
  "Radio Tails": "Radio",
  "Disruption": "Galaxy_Properties",
  "F Stars": "Stellar_Population",
  "Local Group": "Pairs_Clusters",
  "Extreme UV Sources": "Ulraviolet",
  "F Dwarfs": "Stellar_Population",
  "ZZ Ceti Stars": "Stellar_Population",
  "Antitruncation of Disks": "Galaxy_Properties",
  "Peculiar Galaxies": "Galaxies_Quasars",
  "Local Supercluster": "Pairs_Clusters",
  "Radius-Luminosity Relation": "Galaxy_Properties",
  "Associations": "Parts_of_Galaxies",
  "Optical Structure": "Optical",
  "Shell Galaxies": "Galaxies_Quasars",
  "FK Comae Stars": "Stellar_Population",
  "UV Luminosities": "Ulraviolet",
  "Radio Astrometry": "Radio",
  "Companions": "Galaxies_Quasars",
  "Lyman-Alpha Forest": "Galaxies_Quasars",
  "Close Encounters": "Pairs_Clusters",
  "Photometry(Narrow-Band)": "Optical",
  "Radiation Mechanisms": "Arib_Spectroscopy",
  "Deceleration Parameter": "Cosmology",
  "Magnitude-Redshift Relation": "Galaxy_Properties",
  "Line Profiles": "Arib_Spectroscopy",
  "Bolometric Magnitudes": "Galaxy_Properties",
  "Peculiar Objects": "Galaxies_Quasars",
  "Wolf-Rayet Stars": "Stellar_Population",
  "Hot Gas": "Galaxy_Properties",
  "M Supergiants": "Stellar_Population",
  "Catalogues": "Galaxy_Properties",
  "Winds": "Parts_of_Galaxies",
  "Stellar Associations": "Parts_of_Galaxies",
  "Differential Rotation": "Galaxy_Properties",
  "Line Ratios": "Arib_Spectroscopy",
  "Inflationary Universe": "Cosmology",
  "Population III Stars": "Stellar_Population",
  "Luminous Galaxies": "Galaxies_Quasars",
  "Sub-MM Radiation": "Radio",
  "Galactic Bulges": "Parts_of_Galaxies",
  "Lenticular Galaxies": "Galaxies_Quasars",
  "Late-Type Variables": "Stellar_Population",
  "Extreme UV Spectra": "Ulraviolet",
  "Thomson Scattering": "Arib_Spectroscopy",
  "Double Galaxies": "Galaxies_Quasars",
  "UV Sources": "Ulraviolet",
  "Gamma-Ray Light Curves": "Gamma_Rays",
  "21 cm Line": "Radio",
  "Temperature Distribution": "Pairs_Clusters",
  "Cosmic Density Parameter": "Cosmology",
  "Chemical Composition": "Galaxy_Properties",
  "Coordinates": "Galaxy_Properties",
  "Planetary Nebulae": "Parts_of_Galaxies",
  "Absorption Lines": "Arib_Spectroscopy",
  "Galaxy Clustering": "Pairs_Clusters",
  "Spiral Galaxies": "Galaxies_Quasars",
  "Velocity Dispersion": "Galaxy_Properties",
  "Velocity": "Galaxy_Properties",
  "Radio Astronomy": "Radio",
  "Infrared Continuum": "Infrared",
  "Encounters": "Pairs_Clusters",
  "Ae Stars": "Stellar_Population",
  "Size Distribution": "Galaxy_Properties",
  "Cataclysmic Variables": "Stellar_Population",
  "Photographs": "Galaxy_Properties",
  "Water": "Atoms_and_Molecules",
  "High-Velocity Clouds": "Parts_of_Galaxies",
  "Large-Scale Motions": "Cosmology",
  "Long-Period Variables": "Stellar_Population",
  "X-Ray Structure": "X_Rays",
  "Energy Distributions": "Galaxy_Properties",
  "Photography": "Galaxy_Properties",
  "Dust Clouds": "Parts_of_Galaxies",
  "Birthrates": "Galaxy_Properties",
  "Optical Thickness": "Optical",
  "Sulfur Monoxide": "Atoms_and_Molecules",
  "SiO Masers": "Atoms_and_Molecules",
  "Atomic Data": "Arib_Spectroscopy",
  "Pulsating Variables": "Stellar_Population",
  "Galactic X Rays": "Parts_of_Galaxies",
  "Blue Supergiant distance": "Large_Scale_Structures",
  "Explosions": "Galaxy_Properties",
  "Imaging": "Galaxy_Properties",
  "Oblateness": "Galaxy_Properties",
  "UV Continuum": "Ulraviolet",
  "OB Supergiants": "Stellar_Population",
  "Radio Continuum": "Radio",
  "Sodium Lines": "Arib_Spectroscopy",
  "21 cm Rotation Curves": "Radio",
  "Hubble Diagram": "Galaxy_Properties",
  "Distance Moduli": "Large_Scale_Structures",
  "UV Cameras": "Ulraviolet",
  "M Stars": "Stellar_Population",
  "Nearby Groups": "Pairs_Clusters",
  "Baryons": "Cosmology",
  "X-Ray Luminosities": "X_Rays",
  "Rotation Curve": "Galaxy_Properties",
  "Absorption Coefficient": "Arib_Spectroscopy",
  "Gravitational Microlensing": "Cosmology",
  "Image Processing": "Galaxy_Properties",
  "Calcium": "Atoms_and_Molecules",
  "X Ray Sources": "X_Rays",
  "Warping": "Galaxy_Properties",
  "TRGB distance": "Large_Scale_Structures",
  "CCD Photometry": "Optical",
  "Ice": "Atoms_and_Molecules",
  "Gravitational Collapse": "Galaxy_Properties",
  "OH Masers": "Parts_of_Galaxies",
  "OB Stars": "Stellar_Population",
  "Massive Galaxies": "Galaxies_Quasars",
  "Seyfert Galaxies": "Galaxies_Quasars",
  "Mass Function": "Galaxy_Properties",
  "UV Objects": "Ulraviolet",
  "Central Galaxies": "Galaxies_Quasars",
  "Gas Clouds": "Galaxy_Properties",
  "Water Masers": "Parts_of_Galaxies",
  "Radiative Transfer": "Arib_Spectroscopy",
  "Brightness Temperature": "Galaxy_Properties",
  "Spiral Arms": "Parts_of_Galaxies",
  "Dusty Ellipticals": "Galaxies_Quasars",
  "Solar-Type Stars": "Stellar_Population",
  "Compact Groups": "Galaxies_Quasars",
  "Apparent Magnitudes": "Galaxy_Properties",
  "Rings": "Parts_of_Galaxies",
  "Chaos": "Cosmology",
  "Molecular Processes": "Arib_Spectroscopy",
  "Gravitational Redshifts": "Cosmology",
  "Satellite Galaxies": "Galaxies_Quasars",
  "M Giants": "Stellar_Population",
  "CCD Images": "Optical",
  "Brightness Variations": "Galaxy_Properties",
  "Main-Sequence Stars": "Stellar_Population",
  "Plasma": "Arib_Spectroscopy",
  "Infrared Structure": "Infrared",
  "Optical Bursts": "Optical",
  "Photometric Properties": "Galaxy_Properties",
  "Barium": "Atoms_and_Molecules",
  "Nearby Stars": "Stellar_Population",
  "X-Ray Variations": "X_Rays",
  "Magnesium": "Atoms_and_Molecules",
  "Intracluster Gas": "Intergalactic",
  "Gamma-Ray Bursters": "Stellar_Population",
  "D Galaxies": "Galaxies_Quasars",
  "Hydrodynamics": "Galaxy_Properties",
  "Bright Galaxies": "Galaxies_Quasars",
  "UV Maps": "Ulraviolet",
  "Coronae": "Parts_of_Galaxies",
  "Gravitational Constant": "Cosmology",
  "Mira Stars": "Stellar_Population",
  "UV Photometry": "Ulraviolet",
  "Particle Acceleration": "Galaxy_Properties",
  "Late Type Stars": "Stellar_Population",
  "Spirals": "Galaxies_Quasars",
  "Supernovae": "Parts_of_Galaxies",
  "Molecular Lines": "Arib_Spectroscopy",
  "Anisotropy": "Cosmology",
  "Cosmic Abundance": "Cosmology",
  "Flare Stars": "Stellar_Population",
  "Isotropy": "Cosmology",
  "Carbon star distance": "Large_Scale_Structures",
  "Velocity Fields": "Galaxy_Properties",
  "Galactic Orbits": "Parts_of_Galaxies",
  "HII Region Diameter distance": "Large_Scale_Structures",
  "K Giants": "Stellar_Population",
  "B Supergiants": "Stellar_Population",
  "Fluctuations": "Galaxy_Properties",
  "Kinematics (Spatially Resolved)": "Galaxy_Properties",
  "Velocity Field": "Galaxy_Properties",
  "Color-Magnitude Diagram distance": "Large_Scale_Structures",
  "Silicon": "Atoms_and_Molecules",
  "Helium": "Atoms_and_Molecules",
  "AM Herculis Stars": "Stellar_Population",
  "Double Nuclei": "Parts_of_Galaxies",
  "Maser distance": "Large_Scale_Structures",
  "Galactic Bars": "Parts_of_Galaxies",
  "Multiple Stars": "Stellar_Population",
  "Optical Redshift": "Optical",
  "Astrometry": "Galaxy_Properties",
  "Galaxy Voids": "Pairs_Clusters",
  "Atomic Parameters": "Arib_Spectroscopy",
  "Galaxy Content": "Pairs_Clusters",
  "Metal Lines": "Arib_Spectroscopy",
  "Massive Stars": "Stellar_Population",
  "X-Ray Flares": "X_Rays",
  "Gravitational Waves": "Cosmology",
  "Magnitudes": "Galaxy_Properties",
  "Galaxy Encounters": "Pairs_Clusters",
  "Globules": "Parts_of_Galaxies",
  "Dynamics": "Galaxy_Properties",
  "UV Photographs": "Ulraviolet",
  "Diameters": "Galaxy_Properties",
  "HNC": "Atoms_and_Molecules",
  "Mass Ratios": "Galaxy_Properties",
  "X-Ray Background": "X_Rays",
  "Stellar Kinematics": "Galaxy_Properties",
  "Gravitating Disks": "Galaxy_Properties",
  "Star Densities": "Galaxy_Properties",
  "Tidal Interactions": "Pairs_Clusters",
  "X-Ray Spectrometers": "X_Rays",
  "Accretion": "Pairs_Clusters",
  "Flattening": "Galaxy_Properties",
  "Relativistic Jets": "Galaxy_Properties",
  "X-Ray Pulsars": "X_Rays",
  "Nearby Galaxies": "Galaxies_Quasars",
  "Interacting Galaxies": "Galaxies_Quasars",
  "High-Luminosity Stars": "Stellar_Population",
  "Carbon Lines": "Arib_Spectroscopy",
  "Interstellar Medium": "Parts_of_Galaxies",
  "Infrared Astronomy": "Infrared",
  "Open Clusters": "Parts_of_Galaxies",
  "X-Ray Detectors": "X_Rays",
  "Nova distance": "Large_Scale_Structures",
  "Degenerate Stars": "Stellar_Population",
  "HCN": "Atoms_and_Molecules",
  "Irregular Variables": "Stellar_Population",
  "Synchrotron Radiation": "Radio",
  "Orbits": "Pairs_Clusters",
  "Gaseous Streams": "Pairs_Clusters",
  "Lyman-Alpha Systems": "Galaxies_Quasars",
  "Power Spectra": "Large_Scale_Structures",
  "Intergalactic Stars": "Stellar_Population",
  "Groups": "Pairs_Clusters",
  "Star Counts": "Galaxy_Properties",
  "Soliton Stars": "Stellar_Population",
  "Angular Diameters": "Galaxy_Properties",
  "Polarimetry": "Galaxy_Properties",
  "Relativistic Gas": "Galaxy_Properties",
  "Topology": "Cosmology",
  "Post-AGB star distance": "Large_Scale_Structures",
  "Cooling Flows": "Pairs_Clusters",
  "CO": "Atoms_and_Molecules",
  "CN": "Atoms_and_Molecules",
  "Sizes": "Galaxy_Properties",
  "Position Angles": "Galaxy_Properties",
  "Pulsars": "Stellar_Population",
  "Luminosity Function": "Galaxy_Properties",
  "Absolute Magnitudes": "Galaxy_Properties",
  "BV Photometry": "Galaxy_Properties",
  "Radio Galaxies": "Galaxies_Quasars",
  "S0 Galaxies": "Galaxies_Quasars",
  "Markarian Galaxies": "Galaxies_Quasars",
  "Infrared Luminosities": "Infrared",
  "Methyl Cyanide": "Atoms_and_Molecules",
  "X-Ray Counterparts": "X_Rays",
  "cD Galaxies": "Galaxies_Quasars",
  "X-Ray Stars": "X_Rays",
  "Infrared Cirrus": "Infrared",
  "Redshift Surveys": "Galaxy_Properties",
  "Cosmic Dust": "Cosmology",
  "Chaotic Motions": "Cosmology",
  "Beta Cephei Stars": "Stellar_Population",
  "Third Integral": "Galaxy_Properties",
  "Classification": "Galaxies_Quasars",
  "Radio Bursts": "Radio",
  "Red Stars": "Stellar_Population",
  "Double Radio Sources": "Galaxies_Quasars",
  "OB Associations": "Stellar_Population",
  "Hubble-Sandage Stars": "Stellar_Population",
  "Detection": "Galaxy_Properties",
  "Colors": "Galaxy_Properties",
  "Mass-to-Light Ratios": "Galaxy_Properties",
  "Extreme UV Astronomy": "Ulraviolet",
  "Redshifts": "Galaxy_Properties",
  "Disks": "Galaxy_Properties",
  "Intergalactic Reddening": "Intergalactic",
  "UV Images": "Ulraviolet",
  "Hard X Rays": "X_Rays",
  "Gravitation": "Cosmology",
  "Molecular Spectra": "Arib_Spectroscopy",
  "Thermal Stability": "Cosmology",
  "Masses": "Galaxy_Properties",
  "Starbursts": "Galaxies_Quasars",
  "Fundamental Plane distance": "Large_Scale_Structures",
  "Compact Objects": "Galaxies_Quasars",
  "Dynamical Friction": "Pairs_Clusters",
  "UV Surveys": "Ulraviolet",
  "HR Diagrams": "Galaxy_Properties",
  "Dwarfs": "Stellar_Population",
  "Field Galaxies": "Galaxies_Quasars",
  "Mass Distribution": "Galaxy_Properties",
  "UV Polarization": "Ulraviolet",
  "Mass Transfer": "Galaxy_Properties",
  "Infrared Stars": "Infrared",
  "Chemical Evolution": "Galaxy_Properties",
  "Lithium": "Atoms_and_Molecules",
  "HI Diameters": "Radio",
  "Pairs of Galaxies": "Galaxies_Quasars",
  "Herbig Ae-Be Stars": "Stellar_Population",
  "Membership": "Pairs_Clusters",
  "Be Stars": "Stellar_Population",
  "Cosmic Rays": "Cosmology",
  "Metal Abundances": "Galaxy_Properties",
  "Relativistic Particles": "Galaxy_Properties",
  "Optical Transients": "Optical",
  "Lyman Alpha": "Arib_Spectroscopy",
  "Red Supergiants": "Stellar_Population",
  "Irregular Galaxies": "Galaxies_Quasars",
  "Brightnesses": "Galaxy_Properties",
  "Dust Distribution": "Galaxy_Properties",
  "Surface Densities": "Pairs_Clusters",
  "UV-Excess Objects": "Galaxies_Quasars",
  "Contraction": "Pairs_Clusters",
  "Color Excesses": "Galaxy_Properties",
  "Distance Indicators": "Large_Scale_Structures",
  "Galaxy Evolution": "Pairs_Clusters",
  "Aluminum": "Atoms_and_Molecules",
  "Magnetic Stars": "Stellar_Population",
  "Spectra": "Arib_Spectroscopy",
  "Oxygen": "Atoms_and_Molecules",
  "Absorption Spectra": "Arib_Spectroscopy",
  "BY Draconis Stars": "Stellar_Population",
  "Triaxial Systems": "Galaxies_Quasars",
  "Distance": "Large_Scale_Structures",
  "Iron": "Atoms_and_Molecules",
  "Colloquia": "Galaxy_Properties",
  "UV Telescopes": "Ulraviolet",
  "Broad-Line Regions": "Parts_of_Galaxies",
  "Photometry": "Optical",
  "Velocity Distribution": "Galaxy_Properties",
  "Distances": "Large_Scale_Structures",
  "Internal Motions": "Galaxy_Properties",
  "Gas Dynamics": "Galaxy_Properties",
  "Data Bases": "Galaxy_Properties",
  "Fundamental Plane": "Pairs_Clusters",
  "Giant Galaxies": "Galaxies_Quasars",
  "Giant-Branch Stars": "Stellar_Population",
  "Argon": "Atoms_and_Molecules",
  "Acetaldehyde": "Atoms_and_Molecules",
  "Sub-MM Lines": "Radio",
  "Cosmological Parameters": "Cosmology",
  "Galactic Disks": "Parts_of_Galaxies",
  "Energy Transfer": "Galaxy_Properties",
  "Quasar-Galaxy Associations": "Galaxies_Quasars",
  "Cyclotron Radiation": "Radio",
  "Acceleration": "Cosmology",
  "Surveys": "Galaxy_Properties",
  "Color-Lumin Relation": "Galaxy_Properties",
  "CH Stars": "Stellar_Population",
  "H I Content": "Galaxy_Properties",
  "UV Radiation": "Ulraviolet",
  "Iron Lines": "Arib_Spectroscopy",
  "Radio Interferometers": "Radio",
  "X-Ray Images": "X_Rays",
  "Hydrogen-Deficient Stars": "Stellar_Population",
  "Intracluster Matter": "Intergalactic",
  "UV Bursts": "Ulraviolet",
  "Spectral Evolution": "Galaxy_Properties",
  "Lopsided Galaxies": "Galaxies_Quasars",
  "Recurrent Novae": "Stellar_Population",
  "Hot Stars": "Stellar_Population",
  "Cosmochronology": "Cosmology",
  "21 cm Radiation": "Radio",
  "Angular Momentum": "Galaxy_Properties",
  "Energy Content": "Galaxy_Properties",
  "Blazars": "Galaxies_Quasars",
  "X-Ray Groups": "X_Rays",
  "Multiple Galaxies": "Galaxies_Quasars",
  "Hot Spot Nuclei": "Parts_of_Galaxies",
  "Contour Maps": "Radio",
  "Of Stars": "Stellar_Population",
  "Interactions": "Pairs_Clusters",
  "H I Disk": "Parts_of_Galaxies",
  "Methanol": "Atoms_and_Molecules",
  "Galaxies": "Parts_of_Galaxies",
  "Galactic Planes": "Parts_of_Galaxies",
  "Mass Flow": "Galaxy_Properties",
  "Galactic Clusters": "Parts_of_Galaxies",
  "Separation": "Pairs_Clusters",
  "Pictures": "Galaxy_Properties",
  "Jets": "Parts_of_Galaxies",
  "Gravitation Theory": "Cosmology",
  "UV-Bright Stars": "Ulraviolet",
  "Mass-Lumin Relation": "Galaxy_Properties",
  "Image Restoration": "Galaxy_Properties",
  "Am Stars": "Stellar_Population",
  "Ion Densities": "Arib_Spectroscopy",
  "Energy Sources": "Galaxy_Properties",
  "Fluorescence": "Arib_Spectroscopy",
  "Boron": "Atoms_and_Molecules",
  "Intergalactic Gas": "Intergalactic",
  "Molecular Abundances": "Arib_Spectroscopy",
  "Metal Content": "Galaxy_Properties",
  "Stroemgren Photometry": "Optical",
  "Optical Systems": "Optical",
  "Molecules": "Atoms_and_Molecules",
  "Surface Photometry": "Galaxy_Properties",
  "R CrB Stars": "Stellar_Population",
  "Turbulence": "Galaxy_Properties",
  "Compton Effect": "Radio",
  "Nuclei": "Galaxy_Properties",
  "Binaries": "Stellar_Population",
  "Star Clusters": "Parts_of_Galaxies",
  "H I Clouds": "Parts_of_Galaxies",
  "G Giants": "Stellar_Population",
  "Early Type Stars": "Stellar_Population",
  "Radio Structure": "Radio",
  "Blue Galaxies": "Galaxies_Quasars",
  "OH": "Atoms_and_Molecules",
  "Luminous Arcs": "Galaxy_Properties",
  "Population II Stars": "Stellar_Population",
  "Luminosities": "Galaxy_Properties",
  "Gravitational Instability": "Galaxy_Properties",
  "Hg-Mn Stars": "Stellar_Population",
  "Color-Luminosity Relation": "Galaxy_Properties",
  "Bow Shocks": "Pairs_Clusters",
  "Electron Densities": "Arib_Spectroscopy",
  "Mass-To-Light Ratios": "Galaxy_Properties",
  "Gamma-Ray Surveys": "Gamma_Rays",
  "Fundamental Parameters": "Cosmology",
  "Reference Stars": "Stellar_Population",
  "Sulfur Dioxide": "Atoms_and_Molecules",
  "Great Attractor": "Pairs_Clusters",
  "Three-Color Photometry": "Optical",
  "UV Stars": "Ulraviolet",
  "Heat Flow": "Pairs_Clusters",
  "Metal-Deficient Dwarfs": "Stellar_Population",
  "Infrared Objects": "Infrared",
  "Ionization": "Arib_Spectroscopy",
  "Optical Interferometry": "Optical",
  "Gas-to-Dust Ratio": "Galaxy_Properties",
  "A Stars": "Stellar_Population",
  "Population Synthesis": "Galaxy_Properties",
  "Eclipsing Binaries": "Stellar_Population",
  "UBV Photometry": "Galaxy_Properties",
  "C-M Relation": "Galaxy_Properties",
  "Faint Nebulae": "Galaxies_Quasars",
  "Superluminal Motions": "Galaxy_Properties",
  "Short-Period Variables": "Stellar_Population",
  "UV Absorption": "Ulraviolet",
  "Radio Sources": "Radio",
  "Lyman Continuum": "Arib_Spectroscopy",
  "Thermal History": "Cosmology",
  "Protogalaxies": "Galaxies_Quasars",
  "Imaging (Non-Optical)": "Radio",
  "21 cm Mapping": "Radio",
  "Mass Density": "Galaxy_Properties",
  "Dissipative Processes": "Galaxy_Properties",
  "Hubble Constant": "Cosmology",
  "Inhomogeneities": "Cosmology",
  "Einstein Universe": "Cosmology",
  "Galaxy Distribution": "Pairs_Clusters",
  "Initial Mass Function": "Stellar_Population",
  "Late-Type Dwarfs": "Stellar_Population",
  "Luminosity": "Galaxy_Properties",
  "Bolometric Corrections": "Galaxy_Properties",
  "Pairs": "Pairs_Clusters",
  "Interaction": "Pairs_Clusters",
  "Gravitational Redshift": "Cosmology",
  "Emission-Line Stars": "Stellar_Population",
  "Integrals of Motion": "Galaxy_Properties",
  "Two-Color Diagrams": "Galaxy_Properties",
  "Heating": "Pairs_Clusters",
  "Relativistic Beaming": "Galaxy_Properties",
  "Galaxy Mergers": "Pairs_Clusters",
  "Optical Identification": "Optical",
  "Elements": "Atoms_and_Molecules",
  "Space-Time": "Cosmology",
  "Intergalactic Absorption": "Intergalactic",
  "Hydrodynamic Models": "Galaxy_Properties",
  "Cores": "Galaxy_Properties",
  "Mass-Luminosity Relation": "Galaxy_Properties",
  "Chemistry": "Arib_Spectroscopy",
  "Shell Stars": "Stellar_Population",
  "Metagalaxy": "Pairs_Clusters",
  "Proper Motion distance": "Large_Scale_Structures",
  "Plasma Diagnostics": "Arib_Spectroscopy",
  "UV Background": "Ulraviolet",
  "Radio Maps": "Radio",
  "Cyanoacetylene": "Atoms_and_Molecules",
  "Mass Outflow": "Galaxy_Properties",
  "Plasma Jets": "Galaxy_Properties",
  "Late-Type Supergiants": "Stellar_Population",
  "Ages": "Galaxy_Properties",
  "Spiral Waves": "Parts_of_Galaxies",
  "UV Spectrophotometry": "Ulraviolet",
  "Spectrum Synthesis": "Galaxy_Properties",
  "Silicon Lines": "Arib_Spectroscopy",
  "Dynamical Evolution": "Pairs_Clusters",
  "Atomic Hydrogen": "Atoms_and_Molecules",
  "Helium Lines": "Arib_Spectroscopy",
  "Images": "Galaxy_Properties",
  "UBVRI Photometry": "Galaxy_Properties",
  "Ammonia": "Atoms_and_Molecules",
  "Gaseous Nebulae": "Parts_of_Galaxies",
  "X-Ray Bursters": "X_Rays",
  "Bright Stars": "Stellar_Population",
  "Dimensions": "Galaxy_Properties",
  "Infrared Spectrometers": "Infrared",
  "High-Redshift Galaxies": "Galaxies_Quasars",
  "Runaway Stars": "Stellar_Population",
  "Intergalactic Clouds": "Intergalactic",
  "SN Ia distance": "Large_Scale_Structures",
  "Compact Galaxies": "Galaxies_Quasars",
  "Wolf Rayet Stars": "Stellar_Population",
  "Collisions": "Pairs_Clusters",
  "Identification": "Galaxy_Properties",
  "Dwarf Galaxies": "Galaxies_Quasars",
  "Faint Stars": "Stellar_Population",
  "X Rays": "X_Rays",
  "Early Universe": "Cosmology",
  "Radio Lines": "Radio",
  "Chains": "Pairs_Clusters",
  "Density Fluctuations": "Cosmology",
  "Amino Acids": "Atoms_and_Molecules",
  "Velocity Dispersions": "Galaxy_Properties",
  "Isophotes": "Galaxy_Properties",
  "Diffuse Radiation": "Cosmology",
  "G Supergiants": "Stellar_Population",
  "Central Regions": "Parts_of_Galaxies",
  "Intergalactic Dust": "Intergalactic",
  "Optical Observations": "Optical",
  "U Geminorum Stars": "Stellar_Population",
  "Low-Luminosity Stars": "Stellar_Population",
  "Tails": "Parts_of_Galaxies",
  "Radio Luminosities": "Radio",
  "Central Stars": "Stellar_Population",
  "Dust": "Galaxy_Properties",
  "Sub-MM Astronomy": "Radio",
  "Gamma-Ray Spectra": "Gamma_Rays",
  "Gamma-Ray Pulsars": "Gamma_Rays",
  "Quasars": "Galaxies_Quasars",
  "Fine Structure": "Arib_Spectroscopy",
  "Eclipsing Variables": "Stellar_Population",
  "Radio Counterparts": "Radio",
  "Surface Gravity": "Galaxy_Properties",
  "Gravity Waves": "Cosmology",
  "Luminous Blue Variables": "Stellar_Population",
  "Fourier Transforms": "Arib_Spectroscopy",
  "Protons": "Arib_Spectroscopy",
  "Coma": "Galaxies_Quasars",
  "W UMa Stars": "Stellar_Population",
  "Mass-Radius Relation": "Galaxy_Properties",
  "AGB Stars": "Stellar_Population",
  "Color-Redshift Relation": "Galaxy_Properties",
  "Relativistic Fireballs": "Galaxy_Properties",
  "Red Supergiant Variable Star distance": "Large_Scale_Structures",
  "Color Indices": "Galaxy_Properties",
  "Magnesium Oxide": "Atoms_and_Molecules",
  "AGN": "Galaxies_Quasars",
  "Infrared Photometers": "Infrared",
  "Stellar Distribution": "Galaxy_Properties",
  "UV Light Curves": "Ulraviolet",
  "CCD Observations": "Optical",
  "UV Astronomy": "Ulraviolet",
  "C-M Diagrams": "Galaxy_Properties",
  "Gravitational Radiation": "Cosmology",
  "Loops": "Galaxy_Properties",
  "Counts": "Large_Scale_Structures",
  "Faraday Rotation": "Arib_Spectroscopy",
  "Two-Color Photometry": "Galaxy_Properties",
  "Relativistic Plasma": "Galaxy_Properties",
  "Disk Stars": "Stellar_Population",
  "Halos": "Parts_of_Galaxies",
  "X-Ray Light Curves": "X_Rays",
  "Absorption": "Arib_Spectroscopy",
  "Supernova Remnants": "Parts_of_Galaxies",
  "Radio Double Sources": "Radio",
  "Protostars": "Stellar_Population",
  "Dark Nebulae": "Parts_of_Galaxies",
  "OH-IR Stars": "Stellar_Population",
  "Envelopes": "Galaxy_Properties",
  "Numerical Simulations": "Galaxies_Quasars",
  "Formaldehyde": "Atoms_and_Molecules",
  "Quasar-Galaxy Pairs": "Galaxies_Quasars",
  "Barred Spirals": "Galaxies_Quasars",
  "CNO": "Atoms_and_Molecules",
  "Active Nuclei": "Galaxies_Quasars",
  "Families": "Galaxy_Properties",
  "Wolf-Rayet star distance": "Large_Scale_Structures",
  "Missing Mass": "Pairs_Clusters",
  "DDO Photometry": "Optical",
  "Halo Stars": "Stellar_Population",
  "Energetic Particles": "Parts_of_Galaxies",
  "Horizontal Branches": "Stellar_Population",
  "GCLF distance": "Large_Scale_Structures",
  "Dark Matter": "Parts_of_Galaxies",
  "Identifications": "Galaxy_Properties",
  "Night-Sky Brightness": "Cosmology",
  "Thermal Conductivity": "Pairs_Clusters",
  "Radio Stars": "Radio",
  "Synchrotron Sources": "Galaxies_Quasars",
  "Positions": "Galaxy_Properties",
  "OH Emission": "Arib_Spectroscopy",
  "Exciting Stars": "Stellar_Population",
  "SiO": "Atoms_and_Molecules",
  "Gas Kinematics": "Galaxy_Properties",
  "Structure": "Galaxy_Properties",
  "Neutral Hydrogen": "Atoms_and_Molecules",
  "Elliptical Galaxies": "Galaxies_Quasars",
  "Inclinations": "Galaxy_Properties",
  "Carbon Stars": "Stellar_Population",
  "Energy Spectra": "Galaxy_Properties",
  "Extended HI Disks": "Radio",
  "Brown Dwarfs": "Stellar_Population",
  "Close Binaries": "Stellar_Population",
  "Diffuse Background": "Intergalactic",
  "Magellanic Clouds": "Galaxies_Quasars",
  "Electrons": "Arib_Spectroscopy",
  "Stellar Photometry": "Optical",
  "Early-Type Stars": "Stellar_Population",
  "Gamma-Ray Astronomy": "Gamma_Rays",
  "Infrared Sources": "Infrared",
  "Radio Absorption": "Radio",
  "Galactic Winds": "Parts_of_Galaxies",
  "Gas Motions": "Galaxy_Properties",
  "Host Galaxies": "Galaxies_Quasars",
  "Image Reconstruction": "Galaxy_Properties",
  "Pulsating Stars": "Stellar_Population",
  "H I Shells": "Parts_of_Galaxies",
  "General Relativity": "Cosmology",
  "G Dwarfs": "Stellar_Population",
  "Dynamo Theory": "Galaxy_Properties",
  "Gravitational Lenses": "Cosmology",
  "Ellipticities": "Galaxy_Properties",
  "Anomalous Cepheids": "Stellar_Population",
  "Image Quality": "Galaxy_Properties",
  "Optical Spectra": "Optical",
  "Ap Stars": "Stellar_Population",
  "Radio Surveys": "Radio",
  "Silicon Sulfide": "Atoms_and_Molecules",
  "Protogalactic Matter": "Galaxies_Quasars"
}