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(Click for frequent words.) 82 brown dwarf 75 globular clusters 73 rocky planets 73 galaxies 72 super Earths 72 elliptical galaxies 71 exoplanets 71 quasars 71 exoplanet 70 hot Jupiters 70 globular cluster 70 extrasolar planets 70 terrestrial planets 70 transiting planets 69 protoplanetary disks 69 supernovae 69 GRBs 69 X ray binary 69 luminous galaxies 69 planetary nebulae 69 protostar 69 starburst galaxies 68 dwarf galaxies 68 planets orbiting 68 gravitationally bound 68 planets 68 galaxy clusters 68 protostars 68 active galactic nuclei 67 millisecond pulsars 67 HD #b [002] 67 AGNs 67 magnetar 67 neutron stars 67 pulsars 67 exoplanets orbiting 67 Epsilon Eridani 67 KBOs 67 habitable planets 66 Earthlike planets 66 merging galaxies 66 magnetars 66 redshift 66 neutron star 66 planets orbiting distant 66 red supergiant 66 quasar 66 WASP #b 66 SN #gy 66 planets circling 65 sunlike stars 65 dwarf galaxy 65 habitable zones 65 spiral galaxies 65 extrasolar 65 planemos 65 supernova explosions 65 gamma ray bursts 65 Kuiper belt objects 65 distant galaxies 65 X ray binaries 65 stellar nurseries 64 red supergiants 64 Orion Nebula 64 Eta Carinae 64 metallicity 64 protoplanetary disk 64 redshifts 64 supermassive 64 Type Ia supernovae 64 galaxy formation 64 supermassive black holes 63 planet orbiting 63 Gliese #g 63 GJ #b [001] 63 supernova remnants 63 nebulae 63 Gliese #d 63 eclipsing binary 63 Milky Way galaxy 63 planet orbits 63 Beta Pictoris b 63 X ray emission 63 Kepler #b 63 J# +# [002] 63 astronomers 63 supernova explosion 63 Higgs particle 63 planet HD #b 63 HL Tau 63 HD#b 63 Kuiper Belt object 63 extrasolar planet 63 distant galaxy 63 Kuiper belt 63 AB Aurigae 63 Type Ia supernova 63 supernova 62 Cancri e 62 Henize #-# 62 Beta Pictoris 62 distant supernovae 62 gaseous planets 62 globulars 62 Gliese #c 62 galaxy cluster 62 icy moons 62 Omega Centauri 62 chondrules 62 Cepheids 62 supernovas 62 supersymmetric particles 62 CoRoT 7b 62 baryons 62 solar nebula 62 TrES 4 62 planetary nebula 62 exoplanetary 62 elliptical galaxy 62 Kuiper Belt Objects 62 gamma ray burst 62 Fomalhaut b 62 Gliese 61 luminosities 61 Milky Way 61 type Ia supernovae 61 novae 61 Antennae Galaxies 61 Hot Jupiters 61 exoplanet orbiting 61 Corot 9b 61 planetesimals 61 faint galaxies 61 BP Psc 61 SN #A 61 AU Mic 61 gaseous planet 61 GJ #b [002] 61 star Gliese 61 Type Ia 61 hypervelocity stars 61 habitable zone 61 ULIRGs 61 GQ Lupi 61 gravitational microlensing 61 extrasolar planetary systems 61 Large Magellanic Cloud 61 Earthlike planet 61 Andromeda Galaxy 61 pulsar 61 distant quasars 61 planets orbiting stars 61 Type 1a supernovae 60 Higgs bosons 60 type Ia supernova 60 blazars 60 supernova remnant 60 TrES 60 Neutron stars 60 nebular 60 astrophysicists 60 accretion disk 60 reionization 60 circumstellar disks 60 Milky Way Galaxy 60 interstellar clouds 60 accretion disks 60 GJ#b 60 supermassive black hole 60 starburst galaxy 60 gravitational interactions 60 protoplanet 60 transiting planet 60 planets orbiting sun 60 nucleosynthesis 60 trans Neptunian objects 60 Earthlike 59 R#a# 59 extragalactic 59 smallest exoplanet 59 gravitationally 59 comets 59 Milky Way halo 59 astronomical objects 59 microquasar 59 exo planets 59 muons 59 HAT P 59 neutrinos 59 Virgo cluster 59 WIMPs 59 Kuiper Belt objects 59 X ray wavelengths 59 galaxy 59 extrasolar planets orbiting 59 radial velocity 59 CoRoT 59 neutralinos 59 globular star 59 X ray observatories 59 Wolf Rayet stars 59 Hubble observations 59 planetary embryos 59 GeV 59 protoplanetary discs 59 intrinsic brightness 59 Cepheid variables 59 GRB #B 59 cosmological distances 59 sized planets orbiting 59 proplyds 59 COROT 59 Corot 7b 59 Bok globules 59 solar corona 59 planets orbits 58 earthlike planets 58 neutrino 58 Upsilon Andromedae 58 potentially habitable planets 58 Proxima Centauri 58 CoRoT 9b 58 blue supergiant 58 distant quasar 58 cosmic rays 58 BP Piscium 58 Arches Cluster 58 Super Earths 58 sunlike star 58 Gamma ray bursts 58 interacting galaxies 58 constellation Cassiopeia 58 Astronomers 58 Oort cloud 58 nebula 58 axions 58 galaxy M# [002] 58 Red Rectangle 58 Andromeda galaxy 58 Enceladus 58 Goldilocks zone 58 quark gluon plasma 58 Hanny Voorwerp 58 Sedna 58 CoRoT #b 58 fainter objects 58 P/# A2 58 HD# [002] 58 gamma rays 58 exosolar planets 58 proto galaxies 58 Galilean moons 58 SN#A 58 SCP #F# 58 eclipsing binaries 58 planet Gliese #g 58 supergiant stars 57 Cancri 57 Wolf Rayet star 57 brightnesses 57 XMM Newton 57 distant galaxy clusters 57 spiral nebulae 57 SMBH 57 moons orbiting 57 SMBHs 57 Epsilon Aurigae 57 baryon 57 Magellanic Clouds 57 UDFy # 57 Kuiper Belt 57 habitable worlds 57 elongated orbits 57 colliding galaxies 57 Pluto Charon 57 Supernovae 57 chondrites 57 potentially habitable 57 electron neutrinos 57 orbits 57 Type Ia supernovas 57 GRB # 57 giant elliptical galaxies 57 galactic mergers 57 masers 57 B mesons 57 noctilucent clouds 57 filamentary structure 57 TW Hydrae 57 Eagle Nebula 57 chemical abundances 57 Small Magellanic Cloud 57 microlensing events 57 moonlets 57 constellation Hercules 57 Betelgeuse 57 protoplanets 57 astrophysical 57 Wolszczan 57 Magnetars 57 plutoids 57 millisecond pulsar 57 ejecta 56 OGLE TR #b 56 SN #C 56 dust enshrouded 56 R Coronae Borealis 56 positrons 56 G#.# +#.# 56 Triangulum Galaxy 56 microlensing 56 CAIs 56 eccentric orbits 56 Cat Paw Nebula 56 barred spiral galaxy 56 fermions 56 Earths orbiting 56 Orion nebula 56 hydrogen helium 56 X ray telescopes 56 galaxy M# [001] 56 circumstellar disk 56 galactic clusters 56 relativistic particles 56 Tarantula Nebula 56 cosmologists 56 Oort Cloud 56 Dwarf galaxies 56 cluster NGC 56 Saturn rings 56 XO 3b 56 celestial objects 56 galactic cosmic rays 56 celestial object 56 boson 56 Hawking radiation 56 gravitational lenses 56 Stephan Quintet 56 GALEX 56 HM Cancri 56 gamma ray emission 56 blazar 56 Spitzer Space Telescope 56 CoRoT satellite 56 antineutrinos 56 supergiant star 56 gravitational waves 56 Gravitational waves 56 spherically symmetric 56 lensing galaxy 56 interstellar dust 56 Crab Nebula 56 ionized hydrogen 56 active galactic nucleus 56 spectroscopic observations 56 comets orbiting 55 gravitational radiation 55 interstellar medium 55 cosmic microwave background 55 sterile neutrinos 55 inhabitable planets 55 permanently shadowed craters 55 cosmic phenomena 55 Kuiper Belt Object 55 galactic halo 55 SUSY 55 galactic nuclei 55 photosphere 55 cuprates 55 retrograde orbit 55 submillimeter galaxies 55 cosmic ray 55 XTE J# 55 UCDs 55 sterile neutrino 55 Microlensing 55 Seyfert galaxies 55 proto cluster 55 Solar System 55 HII regions 55 Bullet Cluster 55 Zeta Ophiuchi 55 Fornax cluster 55 atoms 55 galactic disk 55 retrograde orbits 55 circumstellar 55 intracluster 55 TNOs 55 God Particle 55 Astrophysicists 55 SN #D 55 BLG #Lb 55 constellation Virgo 55 lunar crust 55 baryonic 55 antiparticle 55 spiral galaxy 55 interstellar cloud 55 transiting exoplanets 55 neutrons 55 occultations 55 unaided eye 55 exoplanetary systems 55 Rosette Nebula 55 missing baryons 55 dusty disks 55 PSR J# 55 mesons 55 Geminga 55 Kuiper belt object 55 gravitational lensing 55 cosmological theories 55 deuterium 55 planetoids 55 Evolution Explorer 55 phyllosilicates 55 high redshift galaxies 55 optical telescopes 55 interstellar dust clouds 55 #gy 55 supersymmetry 55 W boson 55 baryonic matter 55 asteroidal 55 RRATs 54 PZ Tel 54 planets astronomers 54 Bug Nebula 54 Cosmologists 54 antiparticles 54 radial velocity method 54 Konacki 54 Fomalhaut 54 planets moons 54 X ray Observatory 54 sodium atoms 54 meteoroids 54 magnetic monopoles 54 gravitational lens 54 Gliese #e 54 supersymmetric 54 asteroids 54 planet transits 54 SN #E 54 planetary orbits 54 Pegasi 54 SNe Ia 54 Virgo Cluster 54 comet nucleus 54 antimatter particles 54 Quaoar 54 blue straggler 54 Higgs Boson 54 NGC# 54 OGLE 54 Globular clusters 54 SNe 54 exo planet 54 foreground galaxy 54 BLG #L 54 constellation Ursa Major 54 Puppis 54 gravitational wave 54 dense neutron stars 54 Galilean satellites 54 SDSS II 54 organic molecules 54 constellation Aquarius 54 accreting 54 highly elliptical orbits 54 antiprotons 54 infall 54 Higgs boson particle 54 galaxy NGC 54 Earth asteroids 54 superfluid 54 electroweak 54 astrophysical phenomena 54 impactors 54 afterglows 54 hydrated minerals 54 protoplanetary 54 Martian meteorites 54 distant supernovas 54 mantle plumes 54 magma ocean 54 giant gaseous planets 54 Pluto Eris 54 Geminids 54 Alfvén waves 54 energetic electrons 54 nuclei 54 planet Gliese #c 54 VY Canis Majoris 54 silicate dust 54 atomic nuclei 54 rotating neutron stars 54 proto planetary disks 54 X ray emitting 54 submillimeter 54 De Pontieu 54 Carina Nebula 54 asteroids comets 54 Pulsars 53 ultraviolet wavelengths 53 planet TrES 53 Goldilocks planet 53 RS Ophiuchi 53 WMAP 53 general relativity 53 planetary 53 elliptical orbits 53 Bose Einstein condensates 53 interstellar dust grains 53 substorms 53 RHESSI 53 Cosmic Microwave Background CMB 53 Trojan asteroids 53 SN #ha 53 observable universe 53 habitable planet 53 kaons 53 Galaxies 53 Saturn moons 53 Lyman alpha 53 TGFs 53 supernova SN 53 Ring Nebula 53 UB# [003] 53 shorter wavelengths 53 subatomic particle 53 OGLE TR 53 Fermi telescope 53 detect gravitational waves 53 moonlet 53 subsurface ocean 53 magnetic reconnection 53 infrared wavelengths 53 AUs 53 supermassive stars 53 Earths 53 energetic cosmic rays 53 RX J# 53 galactic bulge 53 KH #D 53 star Proxima Centauri 53 Hipparcos 53 VB #b 53 Orionids 53 ionized gas 53 radial velocity technique 53 Tevatron experiments 53 dirty snowballs 53 constellation Taurus 53 galactic cores 53 suns 53 constellation Centaurus 53 Coma Cluster 53 binary asteroid 53 Lagoon Nebula 53 ULP cepheids 53 carbonaceous chondrites 53 outer planets 53 coronagraph 53 Jovian moons 53 Galaxy Evolution 53 dynamical 53 cosmological models 53 polaritons 53 magnetospheric 53 olivine 53 X ray pulses 53 Cosmic rays 53 emission nebula 53 brightest supernova 53 supergiants 53 silicates 53 mu Arae 53 spectroscopic 53 astrophysical objects 53 galaxies collide 53 ALH# 53 fermion 53 giant elliptical galaxy 53 abundances 53 muon 52 atomic particles 52 optical spectra 52 gravitons 52 antihydrogen 52 helium atoms 52 spatially resolved 52 antihydrogen atoms 52 magnetic fields 52 Cosmic Microwave Background 52 earths 52 gravitational redshift 52 meteoritic material 52 Pegasus constellation 52 planet Uranus 52 constellation Carina 52 transiting exoplanet 52 moons 52 orbiting planets 52 dwarf planets 52 tholins 52 supernovae explosions 52 electrons orbiting 52 Mandushev 52 exosphere 52 leptons 52 X ray observatory 52 HIP #b 52 V# Mon 52 superheavy elements 52 -# degrees Fahrenheit [002] 52 substorm 52 reflection nebula 52 dense clumps 52 icy comets 52 Gondolo 52 Delta Cephei 52 cometary material 52 Higgs boson 52 Elliptical galaxies 52 RXTE 52 bolometers 52 spectroscopically 52 constellation Sagittarius 52 Alfven waves 52 stony meteorites 52 solar neutrinos 52 Epsilon Indi 52 gravitational interaction 52 gamma ray observatory 52 Bose Einstein condensate 52 COROT 7b 52 weakly interacting 52 subatomic particles 52 Pieter van Dokkum 52 corona 52 submillimeter wavelengths 52 cosmic cannibal 52 SIRTF 52 quarks 52 circular orbits 52 VLTI 52 thermonuclear reactions 52 Upsilon Andromedae b 52 permanently shadowed 52 orbital resonance 52 jovian 52 lunar craters 52 arcseconds 52 pseudogap 52 optical wavelengths 52 astronomical observations 52 Carinae 52 Sagittarius B2 52 cosmic ray particles 52 celestial bodies 52 coronal mass ejections 52 chromosphere 52 planet WASP #b 52 elliptical galaxy NGC 51 heliosphere 51 hydrogen nuclei 51 IRAS 4B 51 Pleiades cluster 51 gamma ray flares 51 Noctilucent clouds 51 Keck Interferometer 51 SDSS 51 neutralino 51 mesosphere 51 Mpc 51 Voorwerp 51 constellation Eridanus 51 GRB #A 51 Gal Yam 51 pions 51 planetesimal 51 spinning neutron stars 51 axion 51 fainter 51 periodic dimming 51 constellation Lyra 51 planetary nebulas 51 Cygnus X 51 gamma ray photons 51 aerosol particles 51 Kepler 9c 51 Gemini constellation 51 hypernova 51 bosons 51 Eridani 51 carbonate minerals 51 gravitational attraction 51 binary asteroids 51 Active Galactic Nuclei 51 RMC #a 51 high temperature superconductivity 51 nucleons 51 dynamical evolution 51 helium nuclei 51 Comet Elenin 51 Extrasolar planets 51 smallest extrasolar planet 51 ESO PR 51 constellation Libra 51 Comet Holmes 51 spicules 51 z ~ 51 spiral galaxy NGC 51 rubidium atoms 51 IRAS #-# 51 planets comets 51 Exoplanets 51 Peony nebula star 51 planetoid 51 silicon monoxide 51 Dumbbell Nebula 51 orbiting 51 infrared telescopes 51 tau neutrinos 51 Mimas 51 strange quark 51 spacetime 51 CMB radiation 51 HARPS spectrograph attached 51 globular cluster M# 51 carbonate globules 51 MG J# +# 51 sparticles 51 SNR #-#.# 51 presolar grains 51 ionize 51 planetary Transits 51 Uranus Neptune 51 nebulas 51 Saturn magnetosphere 51 Quadrantids 51 excitations 51 Carina constellation 51 arcminutes 51 Comet Lulin 51 Kepler 9b 51 Toutatis 51 infalling 51 spectra 51 ESA XMM Newton 51 sunspots 51 galaxy NGC# 51 IRC +# 51 comets asteroids 51 Venusian atmosphere 51 exoplanets planets outside 51 occulted 51 stellar occultations 51 Mini TES 51 moons Phobos 51 moon Enceladus 51 hydrogen atoms 51 zodiacal light 51 Triangulum 51 S/# P2 51 tungsten isotopes 51 lunar meteorites 51 Lyrids 51 constellation Pegasus 51 Gamma rays 51 SMM J# 51 Trifid 51 galactic collisions 50 COROT exo 3b 50 kpc 50 Phaethon 50 relativistic jets 50 gravitational perturbations 50 Bose Einstein Condensate 50 GRB 50 Cepheid variable 50 Pluto 50 astrometry 50 gravitationally lensed 50 alpha particles 50 Alpha Centauri 50 Neutrinos 50 aurorae 50 electron neutrino 50 particle acceleration 50 NASA Chandra 50 nucleobases 50 superfluids 50 Planck 50 Comet Machholz 50 Maunder minimum 50 dusty cocoons 50 HD# [005] 50 YORP effect 50 polar vortex 50 magnetosphere 50 planets asteroids 50 high temperature superconductors 50 constellation Cygnus 50 solar flares 50 ESO VLT 50 muon neutrinos 50 Filippenko 50 constellation Cetus 50 planets circling stars 50 Agol 50 Butterfly Nebula 50 relativistic protons 50 Helix Nebula 50 superconducting materials 50 spatial dimensions 50 Weakly Interacting Massive Particles 50 meteorites 50 coronal heating 50 star Beta Pictoris 50 NICMOS 50 asterism 50 comet 50 Doradus 50 constellation Aquila 50 supersolid 50 spherical halo 50 inner Oort Cloud 50 Orion constellation 50 telescopes astronomers 50 antiproton 50 ultracold atoms 50 nucleon 50 superconductivity 50 planets Uranus 50 electron volts 50 kelvin 50 neutrino mass 50 Bose Einstein condensation 50 diffuse aurora 50 exciton 50 Astrophysical 50 NASA Kepler spacecraft 50 Jovian moon 50 W bosons 50 Planck satellite 50 dwarf spheroidal galaxies 50 moon Charon 50 carbonaceous chondrite 50 supergiant 50 perihelion 50 -# degrees Celsius [001] 50 particle detectors 50 sun corona 50 excitons 50 electron volt 50 exoplanets planets 50 Planetary nebulae 50 solar radii 50 Trifid Nebula 50 protons collide 50 infalling gas 50 auroral 50 superfluidity 50 dipole moment 50 superdense 50 theoretical particle 50 hydrogen atom 50 Hubble Constant 50 Orionid 50 constellation Scorpius 50 HD #b [001] 50 Coma cluster 50 quantum particle 50 cosmological constant 50 antihelium 50 binary quasar 50 J#.# [001] 50 Hale Bopp 50 magnetospheres 50 supernova remnant Cassiopeia 50 noble gases 50 CMEs 50 zodiacal dust 50 Optical Gravitational Lensing Experiment 50 innermost planet 50 infrared radiation 50 Leonids 50 faintest galaxies 50 SIM PlanetQuest 50 GRB# 50 ROSAT 50 Dauphas 50 polar mesospheric clouds 50 gamma rays emitted 50 blackbody 50 Perseus Cluster 50 energetic gamma rays 50 PSR J# +# 50 photometry 50 photons 49 outer corona 49 antihelium 4 49 Exoplanet 49 proto planetary disk 49 Mauna Kea Hawaii 49 reionization epoch 49 solitons 49 comet McNaught 49 Z bosons 49 gamma ray emitting 49 Jupiter moons 49 cosmic ray collisions 49 phonons 49 Monoceros 49 asteroid 49 Earth radii 49 hadrons 49 neutrino particles 49 buckyballs 49 supernovae explode 49 Helix nebula 49 plutoid 49 particles WIMPs 49 Tycho supernova 49 coronal mass ejections CMEs 49 stellar seismology 49 maser emission 49 antimatter 49 Haumea 49 permanently shadowed regions 49 Rayleigh scattering 49 Einstein equations 49 Geminid meteors 49 outermost planets 49 antineutrino 49 Supernova #A 49 cosmic dust 49 WHIM 49 electron pairing 49 #P/Churyumov-Gerasimenko 49 HESS telescopes 49 SNfactory 49 electron pairs 49 particle colliders 49 Gaensler 49 cosmological 49 coronal loops 49 particles 49 NEAs 49 HARPS instrument 49 superpositions 49 luminosity 49 RY Sagittarii 49 asteroseismology 49 constellation Leo 49 star Spica 49 van Dokkum 49 Pluto moon Charon 49 faraway galaxies 49 asteroid Vesta 49 isotopic composition 49 ultraluminous galaxy 49 hypervelocity star 49 bosonic 49 extrasolar worlds 49 assumed planets circling 49 branes 49 emit X rays 49 GZK cutoff 49 cosmic strings 49 Neptune Uranus 49 biosignatures 49 constellation Auriga 49 VHE gamma rays 49 inner asteroid belt 49 Churyumov Gerasimenko 49 extrasolar planetary 49 visible wavelengths 49 galactic 49 Cassini ion 49 interstellar molecules 49 Rydberg atom 49 nebula NGC 49 Adam Riess 49 hadron 49 geoneutrinos 49 placental mammals 49 Cosmic Evolution 49 2MASS 49 protoplanetary disc 49 particle accelerators 49 wavefunction 49 Jupiter moon Io 49 orbital eccentricity 49 T Tauri 49 NASA Wilkinson Microwave