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(Click for frequent words.) 68 barred spiral galaxy 64 Orion nebula 64 Rosette Nebula 62 Trifid Nebula 62 protostars 62 protoplanetary discs 61 starburst galaxy 61 dusty disks 61 protoplanetary disk 60 Bok globules 60 AB Aurigae 60 planetary nebula 60 Neutron stars 60 Red Rectangle 60 MG J# +# 60 Lagoon Nebula 60 VY Canis Majoris 60 Bug Nebula 60 Carina Nebula 59 nebular 59 Eagle Nebula 59 circumstellar 59 colliding galaxies 59 accretion disks 59 constellation Centaurus 59 circumstellar disks 59 Beta Pictoris 58 planet HD #b 58 IRC +# 58 BP Piscium 58 planetary nebulas 58 HD# [002] 58 ionized hydrogen 58 Planetary nebulae 58 blue supergiant 58 Butterfly Nebula 57 constellation Cassiopeia 57 transiting exoplanet 57 red supergiant 57 distant quasar 57 supermassive 57 circumstellar disk 57 Orion Nebula 57 protoplanet 57 Cat Paw Nebula 57 protoplanetary disks 57 protostar 57 interstellar cloud 57 rotating neutron 57 Stephan Quintet 57 elliptical galaxy 57 sunlike star 57 Tarantula Nebula 57 interstellar clouds 57 giant elliptical galaxy 57 stellar nurseries 56 supernova remnant 56 reflection nebula 56 Epsilon Eridani 56 proplyds 56 giant elliptical galaxies 56 Magnetars 56 Omega Centauri 56 protoplanets 56 galactic disk 56 silicate dust 56 Trifid 56 Horsehead Nebula 56 nebula 55 NGC #A 55 AU Mic 55 Hanny Voorwerp 55 WASP #b 55 Upsilon Andromedae 55 spiral galaxy NGC 55 planets orbiting distant 55 planets moons 55 cluster NGC 55 GJ #b [002] 55 HL Tau 55 volcanic moon Io 55 dense clumps 55 retrograde orbit 55 Henize #-# 55 protoplanetary 55 exoplanet orbiting 55 distant galaxy 55 comets orbiting 55 HD#b 55 Corot 9b 55 Perseus Cluster 55 gaseous planet 55 constellation Carina 55 Omega Nebula 55 superdense 55 V# Mon 55 nebula NGC 54 silicon monoxide 54 dusty cocoons 54 GJ#b 54 AGNs 54 Coma Cluster 54 globulars 54 Cosmic Microwave Background 54 constellation Hercules 54 infall 54 transiting planet 54 supernova explosion 54 constellation Virgo 54 solar nebula 54 nebulae 54 magnetar 54 gravitationally bound 54 interstellar dust clouds 54 constellation Cetus 54 Kuiper belt object 54 lunar crust 54 planetary nebulae 54 galaxy NGC 54 ionized gases 54 icy moons 54 ionised 54 IRAS #-# 54 interacting galaxies 54 WMAP satellite 54 eclipsing binary 54 starlike 54 blue straggler 54 RS Ophiuchi 54 merging galaxies 54 ultraviolet photons 54 Fomalhaut b 54 constellation Auriga 54 elliptical galaxy NGC 54 exoplanets orbiting 54 sunlike stars 54 GJ #b [001] 54 supernova explosions 54 microquasar 54 extrasolar planet 54 Zeta Ophiuchi 54 Jupiter moon Io 53 J# +# [002] 53 lensing galaxy 53 emission nebula 53 SN #C 53 Fornax cluster 53 active galactic nuclei 53 Saturnian moon 53 crystalline silicates 53 SN #gy 53 dust enshrouded 53 planetary Transits 53 COROT 7b 53 moon Dione 53 Gliese #c 53 Epsilon Aurigae 53 Spitzer infrared spectrograph 53 emit X rays 53 Spitzer Space Telescope 53 protoplanetary disc 53 R Coronae Borealis 53 supernova remnants 53 Corot 7b 53 highly magnetized neutron 53 Coma cluster 53 gamma ray observatory 53 solar prominences 53 electron neutrinos 53 Crab Nebula 53 star Beta Pictoris 53 planemos 53 planets orbiting sun 53 HD #b [002] 53 comet Tempel Tuttle 53 HM Cancri 53 moons orbiting 53 proto cluster 53 PSR B# +# 53 galaxy M# [001] 53 extrasolar planets orbiting 53 filamentary structure 53 GQ Lupi 52 exo planet 52 RS Oph 52 Globular clusters 52 galactic halo 52 SDSS II 52 Fermi telescope 52 supergiant star 52 TrES 4 52 Trapezium 52 Beta Pictoris b 52 Carina constellation 52 X ray emitting 52 millisecond pulsars 52 HII regions 52 WISE telescope 52 Wolf Rayet star 52 constellation Pegasus 52 HIP #b 52 Comet Halley 52 emits X rays 52 BLG #L 52 trans Neptunian objects 52 Type Ia supernova 52 coronal loops 52 X ray binary 52 Large Magellanic Cloud 52 Gliese #e 52 proto galaxies 52 Maunder minimum 52 P/# A2 52 constellation Aquarius 52 constellation Eridanus 52 brown dwarf 52 distant quasars 52 Kuiper Belt Objects 52 asteroidal 52 SN #D 52 lunar meteorites 52 solar corona 52 SIRTF 52 KH #D 52 eccentric orbits 52 constellation Andromeda 52 planetesimals 52 airglow 52 SN #A 52 HD #b [001] 52 nucleosynthesis 52 Kepler #b 52 accretion disk 52 extrasolar 52 sized planets orbiting 52 foreground galaxy 52 Upsilon Andromedae b 51 hydrated silica 51 BP Psc 51 brown dwarfs 51 metallicity 51 Evolution Explorer 51 Kuiper Belt object 51 noctilucent clouds 51 earthlike 51 interstellar dust 51 moons circling 51 distant galaxies 51 intracluster 51 glows brightly 51 galaxies 51 constellation Sagittarius 51 starburst galaxies 51 galaxy M# [002] 51 constellation Vulpecula 51 constellation Ursa Major 51 CoRoT 9b 51 G#.# +#.# 51 tholins 51 elongated orbits 51 icy comets 51 elliptical galaxies 51 energetic electrons 51 BLG #Lb 51 planet orbits 51 planets comets 51 cosmological distances 51 GALEX 51 Veil Nebula 51 globular cluster M# 51 Solar TErrestrial RElations Observatory 51 type Ia supernovae 51 millisecond pulsar 51 coronal loop 51 smallest exoplanet 51 dwarf galaxy 51 spiral galaxy 51 X ray binaries 51 extrasolar planet HD #b 51 Type 1a supernovae 51 dimming starlight 51 rotating neutron stars 51 Sagittarius B2 51 Cancri e 51 supernova 51 zodiacal dust 51 galaxy cluster 51 comet McNaught 51 Galaxy Evolution 51 Tarantula nebula 51 radioactive nuclei 51 Cygnus Lyra region 51 Kuiper belt objects 51 Comet Holmes 51 interstellar particles 51 stellar seismology 51 Virgo Cluster 51 quark gluon 50 star Fomalhaut 50 subsurface ocean 50 ejecta 50 red supergiants 50 sodium atoms 50 submillimetre wavelengths 50 type Ia supernova 50 NGC 50 ionized gas 50 planet Gliese #c 50 Galilean satellites 50 magma ocean 50 permanently shadowed craters 50 relativistic jets 50 XO 3b 50 gravitational tides 50 Milky Way halo 50 Doradus 50 spiral galaxies 50 magnetospheric 50 Dumbbell Nebula 50 planets orbits 50 infalling gas 50 quasar 50 stony meteorites 50 luminosities 50 Subaru telescope 50 spatially resolved 50 Small Magellanic Cloud 50 cosmic dust 50 globular cluster 50 spinning neutron 50 GRB #B 50 galactic cores 50 V# Sgr 50 PSR J# 50 globular clusters 50 zodiac constellations 50 Camelopardalis 50 Geminga 50 Saturn magnetosphere 50 orbiting gamma ray 50 binary quasar 50 multiband imaging photometer 50 ultraviolet wavelengths 50 Supernovae 50 moon Io 50 Herbig Ae Be 50 constellation Scorpius 50 lobate scarps 50 Kuiper Belt Object 50 Kepler 9c 50 UDFy # 50 Saturn Enceladus 50 asteroseismology 50 Lyman alpha 50 Saturn outermost ring 50 gibbous 50 X ray wavelengths 50 HESS telescopes 50 celestial object 50 spectroscopically 50 planet orbiting 50 WISE spacecraft 50 neutrino particles 50 blazars 50 quasars 50 molten magma 50 cometary debris 50 galactic bulge 50 graphite whiskers 50 infrared telescope 50 ionised gas 49 planetary embryos 49 rotifer 49 exoplanetary 49 ionise 49 RMC #a 49 antihelium 4 49 gamma rays emitted 49 antineutrinos 49 periodic dimming 49 micrometre sized 49 chemical abundances 49 relativistic particles 49 circumstellar dust 49 Hot Jupiters 49 inhabitable planets 49 planet WASP #b 49 lunar craters 49 assumed planets circling 49 planets circling 49 prominences 49 CoRoT 7b 49 infalling 49 Wolf Rayet stars 49 Great Orion Nebula 49 #P/Churyumov-Gerasimenko 49 radial velocity technique 49 Earths orbiting 49 single celled algae 49 planets atmospheres 49 tidal bulge 49 helium atoms 49 faint galaxies 49 ultracold 49 Helix Nebula 49 sun corona 49 X ray observatory 49 constellation Pisces 49 galactic clusters 49 galaxy formation 49 icy moon Enceladus 49 mu Arae 49 Supernova #A 49 olivine mineral 49 inner asteroid belt 49 Saturn moon 49 spiral galaxy Messier 49 luminous galaxies 49 hydrated minerals 49 silicate grains 49 sundog 49 Earthlike planet 49 Peony nebula star 49 spacecraft flyby 49 KBOs 49 ESO telescope 49 interplanetary dust 49 moon Enceladus 49 Massospondylus 49 gravitational microlensing 49 particle detectors 49 masers 49 CoRoT satellite 49 Dwarf galaxies 49 Oort Cloud 49 Cepheid variables 49 Fomalhaut 49 dense neutron stars 49 filamentary structures 49 blazar 49 ultracold atoms 49 Beehive Cluster 49 Virgo cluster 49 constellation Puppis 49 supernovae explosions 49 helium nuclei 49 Saturn outermost 49 Ultraviolet radiation 49 Earthlike planets 49 Earthlike 49 X ray pulses 49 Samuel Oschin Telescope 49 constellation Aquila 49 detect neutrinos 48 Corona Australis 48 neutralinos 48 CoRoT #b 48 OGLE TR #b 48 interstellar dust grains 48 Convection Rotation 48 polar mesospheric clouds 48 exo planets 48 Chi Cygni 48 mineral olivine 48 microdroplets 48 largest moon Charon 48 muon neutrinos 48 Sombrero Galaxy 48 Proxima Centauri 48 Saturn moon Iapetus 48 Eta Carinae 48 accreting 48 spiral galaxy M# 48 Murchison meteorite 48 Helix nebula 48 planet Gliese #g 48 proto planetary disks 48 galaxy 48 NGC# 48 meteoritic material 48 visible wavelengths 48 Aurigid 48 Cygnus X 48 nuclei 48 astronomer Clyde Tombaugh 48 RX J# 48 globular star 48 photosphere 48 cometary dust 48 stellar occultation 48 binary asteroid 48 substorm 48 VB #b 48 Saturn Cassini 48 electron flux 48 Pluto Charon 48 novas 48 Keck telescope 48 jovian 48 twin STEREO spacecraft 48 comet 48 Pleiades cluster 48 galactic mergers 48 comet nucleus 48 unpolarized 48 Neptune Uranus 48 X ray emission 48 cosmic phenomena 48 comet Hale Bopp 48 comet tail 48 nanobubbles 48 Bose Einstein condensate 48 CAIs 48 CLG J# # 48 Oort cloud 48 earthlike planets 48 brightest supernova 48 Delta Cephei 48 cirrus cloud 48 XTE J# 48 comets asteroids 48 photochemical reactions 48 Pieter van Dokkum 48 Pegasi 48 SMM J# 48 magnetars 48 nebulosity 48 hydrogen helium 48 galaxies collide 48 demoted Pluto 48 hydrogen isotopes 48 gravitationally 48 baryonic 48 Cosmic Microwave Background CMB 48 Explorer WISE 48 extrasolar worlds 48 gravitational interaction 48 filamentary 48 exosphere 48 primitive meteorites 48 distant supernovae 48 Voorwerp 48 magnetic dynamo 48 CMB radiation 48 Gamma ray bursts 48 spirals inward 48 ionizes 48 X ray telescopes 48 gravitationally lensed 48 cumulus cloud 48 VISTA telescope 48 stellar occultations 48 Comet Hartley 48 Ring Nebula 48 orbits Saturn 48 Sagittarius dwarf galaxy 48 SMBH 48 SN#A 48 double helix nebula 48 Mercury exosphere 48 nebulas 48 coronagraph 48 axions 48 Galilean moons 48 Mauna Kea Hawaii 48 Churyumov Gerasimenko 47 Arches Cluster 47 spacecraft orbited 47 neutron stars 47 neutron star 47 waning crescent 47 Submillimeter Array 47 Anthony Remijan 47 constellation Gemini 47 Comet Hale Bopp 47 Extrasolar planets 47 sonoluminescence 47 gaseous planets 47 dynamical evolution 47 smallest extrasolar planet 47 exosolar planets 47 Monoceros 47 Higgs bosons 47 AKARI 47 electron orbiting 47 pulsar 47 planets 47 collisional 47 ionized particles 47 ejecta blanket 47 distant galaxy clusters 47 active galactic nucleus 47 Gliese #d 47 orbited Jupiter 47 Galileo spacecraft 47 Gliese #g 47 rocky planets 47 gamma ray telescope 47 solar radii 47 Infrared Astronomical Satellite IRAS 47 Comet Tempel Tuttle 47 Gravitational waves 47 fainter objects 47 Milky Way galaxy 47 inner Oort Cloud 47 Charon Pluto 47 RY Sagittarii 47 spherical halo 47 Orion constellation 47 SNe 47 constellation Cepheus 47 SNR #-#.# 47 YORP effect 47 Uranus Neptune 47 planet Uranus 47 constellation Lyra 47 gamma rays 47 Galactic cosmic rays 47 Noachian era 47 southern constellation Carina 47 quark gluon plasma 47 volcanic lava flows 47 V# Puppis 47 submillimeter galaxies 47 primordial ingredients 47 Iapetus 47 ULIRGs 47 spiral nebulae 47 Adam Riess 47 X ray Observatory 47 carbonaceous chondrites 47 gamma ray burst 47 Scanning electron micrograph 47 outer corona 47 silicate rocks 47 corona 47 X ray afterglow 47 Venusian atmosphere 47 supernovae 47 Anisotropy Probe 47 pinkish brown 47 redshifted 47 atop Mauna Kea 47 GRB# 47 yellowish 47 ostracods 47 Charles Beichman 47 orbiting observatories 47 Type Ia 47 Orbiter LRO 47 magnetotail 47 hot Jupiters 47 GLAST telescope 47 IBEX spacecraft 47 Milky Way Galaxy 47 #gy 47 planet transits 47 moonlets 47 Planetary Transits 47 moon Phobos 47 ESO PR 47 galactic collisions 47 starquakes 47 occultations 47 pions 47 Io Europa 47 Lulin 47 distant supernovas 47 Mercury magnetosphere 47 starbursts 47 post perovskite 47 Elliptical galaxies 47 spectroscopic observations 47 Andromeda galaxy 47 microscopic specks 47 weakly interacting 47 Type Ia supernovae 47 geoneutrinos 46 orangish red 46 sulfate aerosols 46 Comet 9P/Tempel 1 46 constellation Monoceros 46 called gravitational microlensing 46 silicate particles 46 intrinsic brightness 46 moon Ganymede 46 blobs 46 axial tilt 46 Wolszczan 46 SINFONI 46 cometary material 46 constellation Hydra 46 particles WIMPs 46 van Arkel discovery 46 spinels 46 yolk sac 46 GRB # 46 constellation Serpens 46 aurorae 46 -# degrees Fahrenheit [002] 46 proto planetary disk 46 Kuiper belt 46 galaxy clusters 46 dwarf galaxies 46 faraway galaxies 46 hadron 46 planetary magnetospheres 46 shadowy craters 46 hypervelocity stars 46 supermassive black hole 46 kaons 46 planet magnetosphere 46 high redshift galaxies 46 Puppis 46 zodiacal light 46 ionized atoms 46 COROT 46 Ulysses spacecraft 46 diffuse aurora 46 moon Mimas 46 Jupiter moons 46 arcminutes 46 cosmic microwave background 46 Bullet Cluster 46 supernovas 46 stony meteorite 46 infrared spectra 46 hexagonal mirrors 46 Gamma rays 46 Gamma ray burst 46 ultracold temperatures 46 planets asteroids 46 Planck telescope 46 Astronomical Units 46 constellation Taurus 46 Exoplanets 46 Cancri 46 ROSAT 46 interstellar grains 46 planets orbiting 46 neutrino 46 transiting planets 46 albedo reflectivity 46 retroreflector 46 neutrino telescope 46 constellation Lacerta 46 Diviner 46 orbiting 46 Wolfgang Brandner 46 backscattered 46 X ray spectra 46 Herschel telescope 46 supernova SN 46 super Earths 46 HiRISE image 46 detect gamma rays 46 extrasolar planets 46 meteoroid impacts 46 redshift 46 nicknamed Xena 46 RXTE 46 pinwheel shaped 46 XMM Newton 46 ringed planet 46 spectral measurements 46 electrons protons 46 reionization 46 planetary transits 46 radioactive decay 46 constellations Cygnus 46 hydroxyl molecules 46 atmospheric circulations 46 Mandushev 46 rotational axis 46 ESO VLT 46 Triangulum 46 Nasa spacecraft 46 coronal mass ejections CMEs 46 precessing 46 HiRISE camera 46 Quadrantid 46 irregularly shaped asteroid 46 star Gliese 46 strange quark 46 -# degrees centigrade [001] 46 thermonuclear fusion 46 imaging spectrometer 46 Nikku Madhusudhan 46 VHE gamma rays 46 T Tauri 46 greenish glow 46 constellation Coma Berenices 46 plutoids 46 Muons 46 Doppler shifts 46 arcsecond 46 Jovian moon 46 muon neutrino 46 Muchachos Observatory 46 gravitational tugs 46 retrograde orbits 46 Lyrae 46 gravitational radiation 46 HiRISE camera aboard 46 superdense neutron star 46 earthshine 46 proton antiproton 46 Nectocaris 46 rocky extrasolar planet 46 Herschel Space 46 occulted 46 Pleiades star 46 lunar equator 46 reddish orange hue 46 nightglow 46 maser emission 46 gravitational lenses 46 Phoebe orbits 46 asteroids comets 46 interstellar medium 46 Keck Interferometer 46 XMM Newton satellite 46 supergiant stars 46 outermost planet 46 Earth ionosphere 46 glowing brightly 46 afterglows 46 exhaust plume 46 spherically symmetric 46 galaxies nebulae 46 ray Space Telescope 46 outer planets 46 Spiral galaxies 46 elliptical orbits 46 downwelling 46 MEarth 45 Astrophysicists 45 permanently shadowed regions 45 Alfven waves 45 cosmic rays 45 potassium atoms 45 planet HD#b 45 Digitized Sky Survey 45 Epsilon Indi 45 Geminid meteors 45 ESA Herschel 45 spicule 45 moon Deimos 45 faintest galaxies 45 muons 45 particle acceleration 45 orbital resonance 45 Earth magnetotail 45 Milky Way 45 Active Galactic Nuclei 45 UCDs 45 chromosphere 45 subatomic particle 45 planetesimal 45 phyllosilicates 45 supernovae explode 45 comet Lulin 45 lunar soil 45 colliding protons 45 Cosmic rays 45 Io volcanoes 45 Gemini telescopes 45 galactic cosmic rays 45 Orionids 45 S/# P2 45 constellation Draco 45 unaided eye 45 carbonate minerals 45 energetic cosmic rays 45 Observatory STEREO 45 inch refracting telescope 45 Planitia 45 hydrogen nuclei 45 equatorial latitudes 45 Super Kamiokande 45 Trojan asteroids 45 radial velocities 45 NASA Stardust spacecraft 45 RR Lyrae 45 Herbig Haro 45 Jovian moons 45 baryon acoustic oscillations 45 redshifts 45 OGLE TR 45 spacecraft Cassini 45 Eta Carina 45 Alycia Weinberger 45 green alga 45 Quadrantid meteor shower 45 planets circling stars 45 micro meteorites 45 Crab Pulsar 45 thermonuclear reactions 45 Saturn moon Mimas 45 chlorine monoxide 45 Kaguya probe 45 binary asteroids 45 prograde 45 Keck telescopes 45 Type Ic supernova 45 Saturnian moons 45 infrared wavelengths 45 Comet #P/Holmes 45 reddish hue 45 redshift z = 45 lithium atoms 45 rubidium atoms 45 Optical Gravitational Lensing Experiment 45 astronomers 45 brightnesses 45 planets Uranus 45 gravity warps 45 Relations Observatory STEREO 45 PKS #-# 45 Tharsis Rise 45 supersymmetric particles 45 Reiner Gamma 45 SN #E 45 waning gibbous 45 runaway thermonuclear 45 Saturn rings 45 X ray spectrometer 45 NEAs 45 asteroids orbiting 45 NASA Far Ultraviolet 45 eclipsing binaries 45 millimeter wavelength 45 superheated plasma 45 Ophiuchi 45 silicate crystals 45 dirty snowballs 45 HAT P 45 spicules 45 Brookhaven Relativistic Heavy 45 Voyager spacecraft 45 neutron spectrometer 45 Saturnian system 45 smoggy atmosphere 45 Martian rovers 45 Quadrantids 45 Martian meteorites 45 Uranus Jupiter 45 extrasolar planetary systems 45 Carl Grillmair 45 ESO telescopes 45 innermost planet 45 La Silla observatory 45 meteor fireball 45 Supermassive black 45 waxing crescent 45 comet particles 45 NASA Wilkinson Microwave 45 cometary 45 HD# [005] 45 HARPS spectrograph attached 45 exoplanets 45 Antennae Galaxies 45 spheroidal 45 spectroscopic measurements 45 Type 1a supernova 45 chick embryo 45 microscopic bubbles 45 rubbly 45 Tauri Sb 45 RRATs 45 Andromeda halo 45 astrophysicists 45 energetic gamma rays 45 NASA MESSENGER spacecraft 45 TNOs 45 ESO Paranal Observatory 45 sulfur isotope 45 baryonic matter 45 dwarf spheroidal galaxies 45 mesons 45 Infrared Array Camera 45 celestial phenomena 45 polarimetry 45 infrared observatory 45 orbiting Chandra 45 chondrules 45 moons Phobos 45 Type Ib 45 Astronomers 45 ALH# 45 Spitzer infrared telescope 45 plantlike 45 Gravitational lensing 45 inky sky 45 Rayleigh scattering 45 microlensing 45 STEREO spacecraft 45 cryovolcanism 45 deuterium