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(Click for frequent words.) 70 nebula 69 galaxies 69 protostars 67 nebulas 67 planetary nebulae 67 supernovae 67 quasars 67 stellar nurseries 67 planetary nebula 66 Orion Nebula 66 AGNs 66 starburst galaxy 66 globular clusters 65 luminous galaxies 65 distant galaxies 65 protoplanetary disks 65 exoplanets orbiting 65 accretion disks 65 interstellar clouds 65 supernova explosions 64 planets 64 astronomical objects 64 globular cluster 64 GRBs 64 colliding galaxies 64 Lagoon Nebula 64 spiral galaxies 63 icy moons 63 brown dwarfs 63 supernovas 63 proplyds 63 Andromeda galaxy 63 Orion nebula 63 Supernovae 63 Epsilon Aurigae 63 merging galaxies 63 globulars 62 nebular 62 active galactic nuclei 62 Red Rectangle 62 Andromeda Galaxy 62 SN #A 62 Orion constellation 62 sunlike stars 62 Rosette Nebula 62 Milky Way galaxy 62 X ray emission 62 X ray wavelengths 62 galaxy 62 starbursts 62 supergiant star 62 supernova remnants 62 supermassive 61 X ray binary 61 celestial objects 61 elliptical galaxies 61 planets moons 61 starburst galaxies 61 Galilean moons 61 nebula NGC 61 supernova explosion 61 constellation Cassiopeia 61 planetary nebulas 61 proto galaxies 61 Trifid 61 Kuiper Belt Objects 61 rocky planets 61 globular star 61 HII regions 61 Omega Centauri 61 Upsilon Andromedae 61 AB Aurigae 61 quasar 61 Comet Holmes 61 gamma ray bursts 61 supermassive black holes 61 Cat Paw Nebula 61 constellation Carina 61 interstellar dust 61 Carina Nebula 61 Eagle Nebula 61 Trifid Nebula 61 Bug Nebula 61 terrestrial planets 60 dusty cocoons 60 neutron stars 60 Earthlike planets 60 novae 60 Neutron stars 60 protoplanetary disk 60 Saturn rings 60 extrasolar planets 60 Trapezium 60 fainter objects 60 Bok globules 60 red supergiant 60 photosphere 60 supernova remnant 60 ionized hydrogen 60 blazars 60 dwarf galaxy 60 circumstellar disks 60 Milky Way Galaxy 60 reflection nebula 60 Coma Cluster 60 galaxy clusters 60 afterglows 60 KBOs 60 eclipsing binary 60 Milky Way 60 aurorae 60 constellations 60 Crab Nebula 60 Gamma ray bursts 60 red supergiants 60 cosmological distances 60 habitable planets 59 extrasolar 59 millisecond pulsars 59 Cepheids 59 planetoids 59 planets comets 59 dwarf galaxies 59 Wolf Rayet stars 59 emission nebula 59 Kuiper belt 59 dusty disks 59 protostar 59 lensing galaxy 59 transiting planets 59 distant supernovae 59 KH #D 59 interstellar cloud 59 galaxies nebulae 59 pulsars 59 blue supergiant 59 gravitational interactions 59 solar prominences 59 neutron star 59 astrophysical phenomena 59 brown dwarf 59 Great Orion Nebula 59 interstellar dust clouds 59 Pleiades star 59 galactic halo 59 intrinsic brightness 59 interacting galaxies 59 Beta Pictoris b 59 Helix Nebula 59 Io Europa 59 Type 1a supernovae 59 Neptune Uranus 58 accretion disk 58 noctilucent clouds 58 constellation Virgo 58 exoplanets 58 Milky Way halo 58 Veil Nebula 58 Kuiper belt objects 58 filamentary structure 58 hot Jupiters 58 Gravitational waves 58 comets 58 spiral galaxy 58 galaxies collide 58 Geminga 58 Ring Nebula 58 HD# [002] 58 giant elliptical galaxy 58 Galilean satellites 58 supernova 58 galactic collisions 58 transiting planet 58 galactic mergers 58 Hanny Voorwerp 58 planets orbiting 58 planets orbiting distant 58 magnetar 58 Galaxies 58 circumstellar disk 58 solar corona 58 Pleiades cluster 58 galaxy M# [001] 58 solar nebula 58 XMM Newton 58 extrasolar planetary systems 58 galaxy NGC 58 planets orbits 58 energetic electrons 58 Tarantula Nebula 58 metallicity 58 distant galaxy 58 protoplanetary discs 58 RS Ophiuchi 58 moons 58 unaided eye 58 barred spiral galaxy 58 gaseous planets 58 Type Ia supernova 58 asteroids comets 58 Elliptical galaxies 58 moons orbiting 58 galaxy M# [002] 58 X ray binaries 58 Type Ia supernovae 58 Eta Carinae 58 gravitationally bound 58 planet HD #b 57 magnetars 57 Magnetars 57 circumstellar 57 ionized gas 57 Epsilon Eridani 57 Jupiter moon Io 57 galactic disk 57 comets orbiting 57 Lyman alpha 57 chromosphere 57 proto planetary disks 57 astrophysical 57 Beehive Cluster 57 type Ia supernovae 57 constellation Aquarius 57 constellation Cygnus 57 gamma rays 57 galaxy formation 57 Fomalhaut b 57 galactic clusters 57 SN #gy 57 Planetary nebulae 57 supergiant stars 57 GJ #b [002] 57 rotating neutron stars 57 periodic dimming 57 HD#b 57 supernovae explosions 57 constellation Aquila 57 cluster NGC 57 constellation Lyra 57 blue straggler 57 Globular clusters 57 sized planets orbiting 57 Dumbbell Nebula 57 infalling 57 Coma cluster 57 WASP #b 56 spiral galaxy NGC 56 constellation Hercules 56 constellation Ophiuchus 56 planetesimals 56 Cepheid variables 56 BP Psc 56 Exoplanets 56 elongated orbits 56 coronal mass ejections CMEs 56 ultraviolet wavelengths 56 eccentric orbits 56 exo planets 56 ULIRGs 56 nebulosity 56 exoplanetary 56 Type Ia 56 blazar 56 constellation Orion 56 protoplanets 56 axions 56 gaseous planet 56 extragalactic 56 inhabitable planets 56 CoRoT #b 56 #gy 56 HL Tau 56 HM Cancri 56 nucleosynthesis 56 brightnesses 56 permanently shadowed craters 56 X ray telescopes 56 cosmic phenomena 56 earthlike planets 56 gamma ray flares 56 Beta Pictoris 56 GQ Lupi 56 moons circling 56 galactic bulge 56 exoplanet orbiting 56 Oort Cloud 56 Monoceros 56 Stephan Quintet 56 celestial object 56 dirty snowballs 56 moon Io 56 protoplanet 56 Perseus Cluster 56 planets circling 56 globular cluster M# 56 Hot Jupiters 56 active galactic nucleus 56 Saturnian moon 56 dust enshrouded 56 faint galaxies 56 moonlets 56 Wolf Rayet star 56 constellation Andromeda 56 galaxy cluster 56 planets orbiting sun 55 orbiting planets 55 habitable zones 55 millisecond pulsar 55 Large Magellanic Cloud 55 constellation Taurus 55 Spitzer Space Telescope 55 planet orbiting 55 magnetospheric 55 constellation Centaurus 55 spatially resolved 55 IRAS #-# 55 planets asteroids 55 Betelgeuse 55 Jupiter Saturn 55 spherical halo 55 constellation Ursa Major 55 chondrules 55 constellation Scorpius 55 distant quasars 55 reionization 55 planets orbiting stars 55 moon Ganymede 55 galactic nuclei 55 X ray emitting 55 Orionids 55 Saturnian moons 55 elliptical galaxy 55 prominences 55 volcanic moon Io 55 P/# A2 55 Solar System 55 Spiral galaxies 55 asterism 55 Type Ia supernovas 55 Horsehead Nebula 55 ejecta 55 submillimeter galaxies 55 gamma ray burst 55 gravitational waves 55 star Beta Pictoris 55 Dwarf galaxies 55 elliptical galaxy NGC 55 interstellar medium 55 gamma ray emission 55 Hale Bopp 55 GALEX 55 moons Io 55 relativistic particles 55 Astrophysicists 55 IRC +# 55 silicon monoxide 55 astronomers 55 Noctilucent clouds 55 supermassive black hole 55 galactic cores 55 supernova SN 55 star Spica 55 infall 55 star clusters nebulae 55 Enceladus 55 corona 55 planetary embryos 55 diffuse aurora 54 gamma ray observatory 54 ESO PR 54 chemical abundances 54 HD #b [002] 54 trans Neptunian objects 54 meteoroids 54 giant elliptical galaxies 54 planemos 54 Jupiter Uranus 54 kaons 54 spiral nebulae 54 occultations 54 Carina constellation 54 microquasar 54 Comet Tempel Tuttle 54 zodiacal light 54 assumed planets circling 54 retrograde orbits 54 Fermi telescope 54 gravitational perturbations 54 zodiac constellations 54 IRAS 4B 54 SMBHs 54 Europa Ganymede 54 retrograde orbit 54 sunlike star 54 SMBH 54 Virgo Cluster 54 gravitational interaction 54 sundog 54 Higgs bosons 54 Perseids 54 Canes Venatici 54 planet transits 54 gravitational radiation 54 magnetosphere 54 Leonids 54 Saturn moons 54 lunar crust 54 dwarf spheroidal galaxies 54 V# Mon 54 Astronomers 54 Arches Cluster 54 comet 54 constellation Auriga 54 Supernova #A 54 Omega Nebula 54 tidal tails 54 emit X rays 54 jovian 54 masers 54 astrophysical objects 54 Galaxy Evolution 54 OGLE TR #b 54 luminosities 54 SDSS II 54 Fornax cluster 54 cosmic rays 54 Earths orbiting 54 Earthlike planet 54 Helix nebula 54 VY Canis Majoris 54 redshifts 54 Small Magellanic Cloud 54 coronagraph 54 coronal loops 54 NGC #A 54 Triangulum 54 NGC# 54 cosmos 54 gravitationally lensed 54 gamma ray emitting 54 spherically symmetric 54 Zeta Ophiuchi 53 exoplanet 53 celestial bodies 53 RRATs 53 moonlet 53 Jovian moons 53 blobs 53 Magellanic Clouds 53 planets Uranus 53 SN#A 53 Pulsars 53 Antennae Galaxies 53 WIMPs 53 crystalline silicates 53 orbits 53 distant quasar 53 CoRoT 9b 53 Pleiades 53 MG J# +# 53 Henize #-# 53 constellation Leo 53 auroral 53 suns 53 accreting 53 singularities 53 Delta Cephei 53 Evolution Explorer 53 electron neutrinos 53 outer planets 53 infrared wavelengths 53 Trojan asteroids 53 SNe 53 GRB #B 53 highly elliptical orbits 53 comet McNaught 53 auroral displays 53 coronal mass ejections 53 Saturn Jupiter Uranus 53 Comet Machholz 53 supergiants 53 Higgs particle 53 pulsar 53 auroras 53 dynamical evolution 53 planet orbits 53 dense clumps 53 Extrasolar planets 53 Jupiter Saturn Uranus 53 circumstellar dust 53 lunar craters 53 interstellar dust grains 53 carbonaceous chondrites 53 hypernova 53 ionized gases 53 GJ #b [001] 53 Oort cloud 53 spheroidal 53 highly magnetized neutron 53 intracluster 53 silicates 53 Canis Major 53 spinning neutron stars 53 Corot 7b 53 spiral galaxy M# 53 distant galaxy clusters 53 CMB radiation 53 twin suns 53 rotating neutron 53 Explorer WISE 53 aurora 53 asteroids 53 protoplanetary 53 elliptical orbits 53 Serpens 53 Geminids 53 comet nucleus 53 subatomic particles 53 Digitized Sky Survey 53 constellation Pegasus 53 starlight 53 X ray observatories 53 planets constellations 52 cosmic cannibal 52 visible wavelengths 52 stony meteorites 52 Kuiper Belt 52 Comet Halley 52 occulted 52 faraway galaxies 52 Butterfly Nebula 52 Alfven waves 52 celestial phenomena 52 Cosmic rays 52 constellation Sagittarius 52 supersymmetric particles 52 Cancri e 52 SIRTF 52 Cosmic Microwave Background 52 Puppis 52 sodium atoms 52 olivine mineral 52 baryons 52 neutrinos 52 vortexes 52 Bose Einstein condensates 52 extrasolar planet 52 CoRoT satellite 52 luminosity 52 ringed planet 52 Saturn Enceladus 52 neutralinos 52 constellations planets 52 zodiacal dust 52 Comet Hale Bopp 52 type Ia supernova 52 Kuiper Belt object 52 Doradus 52 HiRISE camera aboard 52 mineral olivine 52 Syrtis Major 52 moon Mimas 52 lobate scarps 52 Hubble observations 52 magnetic monopoles 52 Proxima Centauri 52 comets asteroids 52 Coma Berenices 52 magnetospheres 52 exosphere 52 BLG #Lb 52 collisional 52 galactic cosmic rays 52 Astrophysical 52 Saturn magnetosphere 52 cosmic microwave background 52 tholins 52 Candor Chasma 52 planet Uranus 52 constellation Eridanus 52 Pluto Charon 52 distant suns 52 gamma ray 52 coronal holes 52 super Earths 52 Venusian atmosphere 52 Sagittarius B2 52 magnetic fields 52 Doppler shifts 52 Pieter van Dokkum 52 asteroid belt 52 foreground galaxy 52 Io Europa Ganymede 52 Saturn outermost 52 J# +# [002] 52 Saturn moon Enceladus 52 AU Mic 52 RHESSI 52 relativistic jets 52 meteors 52 brightest supernova 52 eclipsing binaries 51 high redshift galaxies 51 circular orbits 51 particles WIMPs 51 tau neutrinos 51 spinning neutron 51 Meteor showers 51 constellation Coma Berenices 51 slender crescent 51 extrasolar planet HD #b 51 TrES 4 51 dynamical processes 51 VLTI 51 spectroscopic observations 51 hydrated minerals 51 baryon 51 subsurface ocean 51 constellation Gemini 51 Triangulum Galaxy 51 starquakes 51 Orionid 51 Corot 9b 51 Jupiter moons 51 Bullet Cluster 51 LORRI 51 exo planet 51 Kuiper belt object 51 SCP #F# 51 Super Earths 51 IR wavelengths 51 energetic gamma rays 51 filaments 51 Wolszczan 51 planetary surfaces 51 filamentary structures 51 emits X rays 51 constellations Cygnus 51 filamentary 51 Supernovas 51 gravitational lenses 51 novas 51 Mars Uranus 51 gibbous 51 gravitational pulls 51 astrophysicists 51 Solar flares 51 Perseid meteors 51 spectral fingerprints 51 Quadrantid meteor shower 51 galaxies quasars 51 X ray pulses 51 Comet #P 51 constellation 51 cometary debris 51 icy comets 51 Virgo cluster 51 supermassive stars 51 Herbig Ae Be 51 ionised gas 51 haloes 51 permanently shadowed regions 51 bolometers 51 Cancri 51 V# Sgr 51 Saturn auroras 51 double helix nebula 51 GRB # 51 airglow 51 constellation Cetus 51 constellation Perseus 51 Hawking radiation 51 radial velocity 51 Earthlike 51 Type 1a supernova 51 star Gliese 51 antimatter particles 51 redshift 51 branes 51 millimeter wavelengths 51 icy moon Enceladus 51 NASA Chandra 51 phosphorescence 51 gravitational lensing 51 stellar occultations 51 permanently shadowed 51 earthshine 51 faraway galaxy 51 magnetotail 51 Exoplanet 51 plagioclase 51 gravitational tides 51 Hyakutake 51 hydrogen helium 50 Camelopardalis 50 Sombrero Galaxy 50 asteroidal 50 faint smudges 50 prograde 50 Ringed Planet 50 detect gravitational waves 50 infrared wavelength 50 moon Enceladus 50 substorm 50 AKARI 50 radial velocity technique 50 polar craters 50 PSR B# +# 50 habitable worlds 50 Scorpii 50 nuclei 50 COROT 50 microlensing events 50 transiting exoplanets 50 planetary magnetospheres 50 Voorwerp 50 sunspots 50 HiRISE image 50 Sagittarius dwarf galaxy 50 ultracold atoms 50 Comet Hartley 2 50 Uranus Neptune 50 Ophiuchi 50 interstellar molecules 50 vortices 50 SNR #-#.# 50 SN #D 50 silicate dust 50 Cosmic Microwave Background CMB 50 detect gamma rays 50 organic molecules 50 BP Piscium 50 magmas 50 SNfactory 50 atoms 50 spiral galaxy Messier 50 primitive meteorites 50 floating orbs 50 spectroscopic measurements 50 constellation Draco 50 Kuiper Belt objects 50 cosmological theories 50 Martian craters 50 GRB #A 50 Geminid meteors 50 CMB photons 50 starlike 50 Mimas 50 planetary transits 50 helium atoms 50 noble gases 50 X ray Observatory 50 sun corona 50 outer corona 50 PZ Tel 50 Orionid meteors 50 cinder cones 50 GRB# 50 Asteroid Belt 50 gravitational microlensing 50 Kepler 9c 50 presolar grains 50 Gondolo 50 Cepheus 50 Komossa 50 quark gluon plasma 50 galactic 50 planet WASP #b 50 Meteor Showers 50 phyllosilicates 50 spectra 50 ionize 50 Great Observatories 50 carbonate minerals 50 RXTE 50 neutrino particles 50 Corona Australis 50 proto planetary disk 50 impactors 50 zodiacal constellations 50 innermost planet 50 runaway thermonuclear 50 waxing gibbous moon 50 radioactive nuclei 50 particle acceleration 50 Tarantula nebula 50 Upsilon Andromedae b 50 CMEs 50 brightest meteors 50 Fermi Gamma ray 50 Orion Belt 50 Muons 50 Cygnus X 50 Corona Borealis 50 Active Galactic Nuclei 50 elliptical shapes 50 Microlensing 50 comet Tempel Tuttle 50 waxing crescent moon 50 Jupiter magnetosphere 50 noctilucent 50 potentially habitable planets 50 PSR J# 50 Carinae 49 optical wavelengths 49 XTE J# 49 Taurids 49 spectroscopically 49 meteor craters 49 Infrared Thermal Imaging Spectrometer 49 stellar seismology 49 XMM Newton observations 49 CoRoT 7b 49 Astrophysical Journal 49 polar mesospheric clouds 49 Quadrantids 49 Fomalhaut 49 astrometry 49 GRB 49 ferric oxides 49 cloudscapes 49 diffraction patterns 49 olivines 49 astronomical phenomena 49 R Coronae Borealis 49 cometary 49 submillimetre wavelengths 49 silicate grains 49 fainter 49 spherules 49 Uranus Jupiter 49 silicate mantle 49 Terra Meridiani 49 gamma ray bursts GRBs 49 electroweak 49 gravitationally 49 Voyager spacecraft 49 VHE gamma rays 49 Saturn Cassini 49 spicules 49 ionized particles 49 superfluid 49 moons Io Europa Ganymede 49 Globular Cluster 49 redshifted 49 solar radii 49 planet TrES 49 heliosphere 49 magnetic reconnection 49 plutoids 49 coronal loop 49 SUSY 49 Adam Riess 49 azurite 49 infrared spectra 49 Seyfert galaxies 49 G#.# +#.# 49 Astrophysical Journal Letters 49 particles 49 gravity warps 49 Gemini constellation 49 dense neutron stars 49 ULP cepheids 49 Phaethon 49 gamma rays emitted 49 interstellar grains 49 glowing orbs 49 RS Oph 49 Gamma rays 49 antineutrinos 49 underwater volcanoes 49 antiparticles 49 planet magnetosphere 49 cosmologists 49 protoplanetary disc 49 ionise 49 hypervelocity stars 49 glowing brightly 49 gibbous moon 49 mineral hematite 49 ecliptic plane 49 morphologies 49 Cassini flyby 49 moon Titan 49 meteor showers 49 atomic nuclei 49 #P/Holmes 49 hydrated silica 49 supernovae explode 49 Gamma ray bursts GRBs 49 Gamma ray 49 helium nuclei 49 earthlike 49 solar flares 49 Galileo spacecraft 49 Delta Aquarids 49 neutrons 49 spectral measurements 49 X ray afterglow 49 emit gamma rays 49 planets atmospheres 49 Perseid shower 49 proto cluster 49 moons Phobos 49 W boson 49 axion 49 star Fomalhaut 49 Pegasi 49 Kepler #b 49 RX J# 49 Caloris 49 comet Swift 49 Black Holes 49 comet Lulin 49 outer layers 49 hydrothermal vent 49 orbits Saturn 49 Distant galaxies 49 silicate minerals 49 starburst 49 spacetime 49 neutrino 49 SN #C 49 olivine crystals 49 Crab Pulsar 49 infalling gas 49 spectroscope 49 Dwarf Galaxies 49 ESO VLT 49 meteor fireball 49 Epsilon Indi 49 submillimeter 49 Ursa Minor 49 Planets 49 Solar TErrestrial RElations Observatory 49 binary asteroid 49 Eta Carina 49 binary quasar 49 celestial sphere 49 Relations Observatory STEREO 49 spacecraft flyby 49 Galactic cosmic rays 49 Saturn moon 49 faraway planets 49 hadron 49 blackholes 49 luminous 49 bosonic 48 Kuiper Belt Object 48 ultraviolet photons 48 exosolar planets 48 supergiant 48 baryon acoustic oscillations 48 Planck telescope 48 extrasolar planets orbiting 48 Comet Lulin 48 X ray observatory 48 yardangs 48 Venus Uranus 48 BLG #L 48 zodiacal constellation 48 Saturn moons Titan 48 astrophotographer 48 interstellar space 48 relativistic protons 48 planet HD#b 48 Saturn moon Mimas 48 Lyrids 48 southern constellation Carina 48 Cygnus Lyra region 48 smoggy atmosphere 48 comet Hale Bopp 48 Cassiopeia 48 Monthly Notices 48 mantle plumes 48 meteorites 48 celestial 48 Sunspots 48 habitable planet 48 post perovskite 48 Jupiter Ganymede 48 Valles Marineris 48 smoker vents 48 called lobate scarps 48 stellar occultation 48 universe 48 Explosive eruptions 48 femtosecond timescale 48 Mars Jupiter Uranus 48 Saturnian 48 moon Charon 48 submillimetre 48 lavas 48 Gliese #e 48 Olympus Mons 48 TrES 48 Andromeda 48 Comet #P/Holmes 48 WMAP satellite