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(Click for frequent words.) 78 galaxies 75 dwarf galaxy 74 globular clusters 71 rocky planets 71 supermassive black holes 71 galaxy clusters 70 globulars 70 neutron stars 70 spiral galaxies 69 elliptical galaxies 69 supernovae 69 planetary nebulae 69 merging galaxies 68 brown dwarfs 68 quasars 68 terrestrial planets 68 distant galaxies 68 AGNs 67 planetesimals 67 gravitational interactions 67 supermassive black hole 67 neutron star 67 protoplanetary disks 66 active galactic nuclei 66 globular cluster 66 hot Jupiters 66 Kuiper belt 66 GRBs 66 distant galaxy 66 galaxy cluster 66 planets 65 KBOs 65 supernova explosions 65 stellar nurseries 65 Milky Way halo 65 galaxy 65 starburst galaxies 65 gravitationally 65 elliptical galaxy 65 supernova explosion 65 comets 65 Milky Way galaxy 65 quasar 64 Earthlike planets 64 protostar 64 pulsars 64 protoplanetary disk 64 sunlike stars 64 interstellar clouds 64 chondrules 64 super Earths 64 gravitationally bound 64 supernovas 64 SN #gy 64 X ray emission 64 Milky Way 64 red supergiants 63 protostars 63 supermassive 63 X ray binary 63 moonlets 63 Large Magellanic Cloud 63 planets orbiting 63 millisecond pulsars 63 icy moons 62 nebular 62 red supergiant 62 millisecond pulsar 62 hypervelocity stars 62 solar nebula 62 magnetars 62 Eta Carinae 62 galactic disk 62 Milky Way Galaxy 62 Kuiper belt objects 62 distant quasars 62 WASP #b 61 exoplanets 61 transiting planets 61 Type Ia supernovae 61 protoplanet 61 Beta Pictoris b 61 ejecta 61 magnetar 61 planetary nebula 61 extrasolar 61 brown dwarf 61 Andromeda galaxy 61 Hot Jupiters 61 baryons 61 SN #A 61 interstellar medium 61 Type Ia supernova 61 Galaxies 61 pulsar 61 Saturn rings 61 Martian meteorites 61 extrasolar planets 61 exoplanets orbiting 61 X ray wavelengths 60 metallicity 60 colliding galaxies 60 neutralinos 60 Antennae Galaxies 60 interstellar dust 60 type Ia supernovae 60 elongated orbits 60 distant supernovae 60 proto galaxies 60 redshift 60 type Ia supernova 60 accretion disk 60 galactic mergers 60 WIMPs 60 planets orbits 60 Virgo cluster 60 Oort cloud 60 supernova remnants 60 supernova 60 galaxy formation 60 Higgs bosons 60 astronomers 60 exo planets 60 planemos 60 gaseous planet 59 Dwarf galaxies 59 HD #b [002] 59 accreting 59 circumstellar 59 nebulae 59 supergiant stars 59 Andromeda Galaxy 59 comet 59 Small Magellanic Cloud 59 planets circling 59 Neutron stars 59 galactic clusters 59 novae 59 Orion Nebula 59 HD#b 59 ULIRGs 59 Wolszczan 59 habitable planets 59 planets orbiting stars 59 Kuiper Belt objects 59 P/# A2 59 Beta Pictoris 59 protoplanets 59 Omega Centauri 59 atoms 59 proto planetary disks 59 TrES 4 59 X ray binaries 58 circumstellar disks 58 redshifts 58 Oort Cloud 58 Wolf Rayet star 58 nebula 58 luminous galaxies 58 nuclei 58 Solar System 58 sunlike star 58 galaxies collide 58 Bullet Cluster 58 faint galaxies 58 BP Psc 58 Epsilon Eridani 58 Kuiper Belt 58 astrophysicists 58 eclipsing binary 58 exoplanet 58 gravitational lensing 58 planet orbiting 58 reionization 58 blazars 58 gamma ray bursts 58 AU Mic 58 comet nucleus 58 planets orbiting sun 58 starburst galaxy 58 spiral galaxy 58 baryonic 58 Hubble observations 58 binary asteroids 58 accretion disks 58 proplyds 58 moons orbiting 58 infall 57 Type Ia 57 SN#A 57 phyllosilicates 57 Kuiper Belt Objects 57 SMBH 57 Henize #-# 57 chondrites 57 Wolf Rayet stars 57 gravitational waves 57 Cepheids 57 supergiant star 57 Orion nebula 57 supermassive stars 57 Trojan asteroids 57 galaxy M# [002] 57 gamma ray burst 57 carbonaceous chondrites 57 planetary embryos 57 planet WASP #b 57 CoRoT #b 57 meteoroids 57 SMBHs 57 sterile neutrinos 57 interacting galaxies 57 star Gliese 57 active galactic nucleus 57 gamma rays 57 Upsilon Andromedae 57 Triangulum 57 planet orbits 57 eccentric orbits 57 GJ #b [001] 57 stony meteorites 57 giant elliptical galaxies 57 Pulsars 57 Red Rectangle 57 dwarf spheroidal galaxies 57 Magellanic Clouds 57 GRB # 57 moons 57 AB Aurigae 57 blue supergiant 57 asteroids 56 galactic bulge 56 supernova remnant 56 moonlet 56 interstellar cloud 56 habitable zones 56 proto planetary disk 56 HM Cancri 56 infalling 56 inhabitable planets 56 extrasolar planetary systems 56 XMM Newton 56 organic molecules 56 gravitational lenses 56 dirty snowballs 56 gaseous planets 56 lunar crust 56 Supernovae 56 Coma Cluster 56 circumstellar disk 56 CoRoT 7b 56 HL Tau 56 X ray observatories 56 Gravitational waves 56 filamentary structure 56 Evolution Explorer 56 Virgo Cluster 56 comets orbiting 56 exoplanet orbiting 56 TNOs 56 Hanny Voorwerp 56 giant elliptical galaxy 56 baryon 56 lensing galaxy 56 protoplanetary discs 56 impactors 56 electron neutrinos 56 asteroid belt 56 magnetic fields 56 primitive meteorites 56 galactic halo 56 galactic nuclei 56 nucleosynthesis 56 planets orbiting distant 56 blue straggler 56 interstellar grains 56 positrons 56 planets asteroids 56 supersymmetric particles 56 Astronomers 56 extrasolar planets orbiting 56 Fomalhaut b 56 Higgs particle 55 baryonic matter 55 solar corona 55 tidal tails 55 planetesimal 55 Sagittarius dwarf galaxy 55 Gamma ray bursts 55 Earthlike 55 axions 55 silicates 55 sodium atoms 55 Galaxy Evolution 55 Earths orbiting 55 infrared wavelengths 55 R#a# 55 microlensing events 55 atomic nuclei 55 rotating neutron stars 55 astronomical objects 55 Bok globules 55 radial velocity 55 fainter objects 55 circular orbits 55 J# +# [002] 55 globular star 55 submillimeter galaxies 55 RS Ophiuchi 55 asteroidal 55 intrinsic brightness 55 Tarantula Nebula 55 olivine 55 exoplanetary 55 distant galaxy clusters 55 high redshift galaxies 55 carbonate minerals 55 galactic collisions 55 galaxy NGC 55 Fornax cluster 55 Type Ia supernovas 55 planet HD #b 55 transiting exoplanets 55 axion 55 quark gluon plasma 55 antimatter particles 55 Seyfert galaxies 55 orbits 55 Globular clusters 55 presolar grains 55 Spiral galaxies 55 Galilean moons 55 ionized hydrogen 55 trans Neptunian objects 55 GJ #b [002] 55 cosmic phenomena 55 Triangulum Galaxy 55 GeV 55 microquasar 54 galactic cosmic rays 54 icy comets 54 spatial dimensions 54 particles 54 neutrino 54 Earthlike planet 54 VY Canis Majoris 54 sized planets orbiting 54 Arches Cluster 54 Geminga 54 Murchison meteorite 54 SNe 54 CAIs 54 spherical halo 54 helium nuclei 54 antiparticles 54 Kuiper Belt object 54 planets astronomers 54 Kepler #b 54 Hawking radiation 54 HII regions 54 cosmological distances 54 magma ocean 54 sterile neutrino 54 magnetosphere 54 gamma ray emission 54 Supernova #A 54 filaments 54 outer planets 54 Astrophysicists 54 Planetary nebulae 54 silicate dust 54 reflection nebula 54 aerosol particles 54 retrograde orbit 54 luminosities 54 Cancri e 54 GJ#b 54 Epsilon Aurigae 54 gravitational perturbations 54 RRATs 54 neutrinos 54 foreground galaxy 54 meteorites 54 cometary material 54 Corot 7b 54 crystalline silicates 54 spiral nebulae 54 NGC# 54 B mesons 53 Extrasolar planets 53 retrograde orbits 53 Type 1a supernovae 53 observable universe 53 chemical abundances 53 elliptical orbits 53 carbonate globules 53 Kuiper Belt Object 53 X ray telescopes 53 Quaoar 53 planets comets 53 Gal Yam 53 interstellar dust grains 53 cosmic rays 53 asteroids comets 53 coronal mass ejections CMEs 53 interplanetary dust 53 supergiants 53 binary asteroid 53 Earths 53 inner moons 53 assumed planets circling 53 G#.# +#.# 53 particles WIMPs 53 non baryonic 53 optical wavelengths 53 X ray Observatory 53 cosmic dust 53 nucleobases 53 planetoids 53 BP Piscium 53 planets moons 53 Corot 9b 53 gravitons 53 RXTE 53 radioactive nuclei 53 celestial object 53 Pluto Charon 53 MG J# +# 53 coronagraph 53 ESA XMM Newton 53 constellation Cassiopeia 53 Gliese #d 53 Lyman alpha 53 brightest supernova 53 galactic cores 53 exosphere 53 filamentary 53 supernovae explosions 53 SNR #-#.# 53 spectroscopically 53 Cat Paw Nebula 53 ultraviolet wavelengths 53 dynamical evolution 53 Kazantzidis 53 SN #E 53 coronal loops 53 Saturn aurora 53 spectroscopic observations 53 transiting planet 53 astrophysical 53 protoplanetary 53 extrasolar planet 53 interstellar particles 53 gravitational microlensing 53 tau neutrinos 53 redshifted 53 silicate mantle 53 shorter wavelengths 53 Gliese #c 53 astrophysical phenomena 53 chondritic meteorites 53 Sedna 53 constellation Virgo 53 extragalactic 53 OGLE TR #b 53 silicate grains 53 osmium 52 outermost planets 52 neutrons 52 Earth magnetosphere 52 Comet Tempel Tuttle 52 heavily cratered 52 excitons 52 helium atoms 52 gravitational interaction 52 stellar occultations 52 photosphere 52 cosmic microwave background 52 CoRoT 9b 52 masers 52 spacetime 52 antiprotons 52 noctilucent clouds 52 Gliese #g 52 RX J# 52 exosolar planets 52 afterglows 52 SDSS II 52 Cepheid variables 52 distant quasar 52 photons 52 dimers 52 Kuiper belt object 52 Trifid Nebula 52 highly elliptical orbits 52 Andromeda 52 asteroid 52 weakly interacting 52 hydrogen atoms 52 Pluto Eris 52 HIP #b 52 Saturn magnetosphere 52 olivine mineral 52 outer layers 52 muons 52 SN #D 52 magnetic monopoles 52 hydrogen helium 52 Magnetars 52 Exoplanets 52 dense clumps 52 W boson 52 RHESSI 52 planetary nebulas 52 superdense 52 optical telescopes 52 eclipsing binaries 52 visible wavelengths 52 Elliptical galaxies 52 Proxima Centauri 52 fermions 52 energetic cosmic rays 52 GRB #B 52 neutrino mass 52 Microlensing 52 galactic 52 Active Galactic Nuclei 52 SN #C 52 hydroxyl molecules 52 tholins 52 V# Mon 52 zodiacal dust 52 asteroids orbiting 52 energetic electrons 52 Alfven waves 52 elliptical galaxy NGC 52 cosmic ray particles 52 astrophysical objects 52 meteoritic material 52 celestial bodies 52 meteoroid 52 kaons 52 permanently shadowed craters 52 proto cluster 52 Super Earths 52 blazar 52 Andromeda halo 52 lithium atoms 52 Cosmic Microwave Background 52 Zeta Ophiuchi 52 silicon monoxide 51 collisional 51 muon neutrinos 51 protoplanetary disc 51 relativistic particles 51 cosmic strings 51 interstellar dust clouds 51 Grillmair 51 gravitational tugs 51 potentially habitable planets 51 nanoclusters 51 Saturn outermost ring 51 inner asteroid belt 51 ALH# 51 Enceladus 51 Stephan Quintet 51 nucleon 51 hematite mineral 51 barred spiral galaxy 51 Cancri 51 solitons 51 dye molecules 51 Doradus 51 Bug Nebula 51 planetary orbits 51 orbiting planets 51 antiparticle 51 GALEX 51 GQ Lupi 51 solar flares 51 occultations 51 supernova remnant Cassiopeia 51 Gondolo 51 melanosomes 51 cosmic ray 51 Spitzer Space Telescope 51 transiting exoplanet 51 cosmologists 51 Mushotzky 51 emission nebula 51 planets Uranus 51 plagioclase 51 gravitational radiation 51 CoRoT satellite 51 alpha particles 51 Perseus Cluster 51 Epsilon Indi 51 meteorite fragments 51 buckyballs 51 ionized gas 51 Filippenko 51 nebulosity 51 Cosmologists 51 Adam Riess 51 TrES 51 SCP #F# 51 gravitational lens 51 dust particles 51 Comet Holmes 51 thermonuclear reactions 51 Hyades cluster 51 optical spectra 51 constellation Carina 51 X ray emitting 51 electrons 51 CMEs 51 Bose Einstein condensate 51 Crab Nebula 51 faraway galaxies 51 pions 51 Trifid 51 plutoids 51 Upsilon Andromedae b 51 spheroidal 51 magnetospheric 51 strangelets 51 nucleons 51 silicate minerals 51 Hale Bopp 51 Saturn moons 51 abundances 51 dense neutron stars 51 deuterium 51 XO 3b 51 mesons 51 Mimas 51 spherically symmetric 51 Pieter van Dokkum 51 interstellar dust particles 51 vortices 51 Geminids 51 Eagle Nebula 51 moon Mimas 51 XTE J# 50 Saturnian moon 50 Jupiter Saturn Uranus 50 lunar meteorites 50 W bosons 50 Maunder minimum 50 Carina constellation 50 Supermassive black 50 subatomic particles 50 inhomogeneous 50 NEAs 50 HD# [002] 50 supersymmetric 50 Voorwerp 50 exo planet 50 NASA Chandra 50 aurorae 50 spherules 50 supercontinents 50 particle colliders 50 constellation Ursa Major 50 gravitational wave 50 Gliese 50 lunar craters 50 GRB 50 dwarf planets 50 spiral galaxy NGC 50 millimeter wavelengths 50 Quadrantid 50 quasicrystal 50 spherical particles 50 cluster NGC 50 #gy 50 Gliese #e 50 neutralino 50 Galilean satellites 50 subatomic particle 50 Keck Interferometer 50 Smithsonian astronomer 50 smallest exoplanet 50 Bose Einstein condensates 50 Monoceros 50 carbonaceous chondrite 50 spacecraft flyby 50 WM Keck Observatory 50 polaritons 50 moon Ganymede 50 Andromeda XII 50 Rosette Nebula 50 God Particle 50 magnetospheres 50 Cosmic rays 50 constellation Hercules 50 Scheila 50 globular cluster M# 50 exoplanetary systems 50 quantum mechanically 50 z ~ 50 positronium atoms 50 PSR J# +# 50 Phaethon 50 boson 50 Dwarf Galaxies 50 intracluster 50 Fermi telescope 50 lavas 50 COROT 50 Venusian atmosphere 50 electrons orbiting 50 Veil Nebula 50 BLG #Lb 50 earthlike planets 50 habitable worlds 50 interstellar molecules 50 CMB radiation 50 Comet Hale Bopp 50 manganese atoms 50 Carina Nebula 50 dusty disks 50 giant gaseous planets 50 circumstellar dust 50 Comet Elenin 50 planet Gliese #c 50 lobate scarps 50 hydrated minerals 50 noble gases 50 cosmological theories 50 phonons 50 Area Telescope LAT 50 maser emission 50 elemental abundances 50 constellation Eridanus 50 Late Heavy Bombardment 50 prebiotic molecules 50 Gaensler 50 biosignatures 50 Jovian planets 50 planet Uranus 50 planetoid 50 strange quark 50 missing baryons 50 mineral olivine 50 quasicrystals 50 gravitational tides 50 antineutrinos 50 moon Mab 50 halos 50 antihydrogen 50 Hipparcos 50 Coma cluster 50 supergiant 50 BLG #L 50 Crab Pulsar 50 nanocrystals 50 constellation Cetus 50 Kailash Sahu 50 constellation Taurus 50 Orionids 49 Scorpii 49 galaxy M# [001] 49 regolith 49 spatially resolved 49 TGFs 49 antimatter 49 ESO VLT 49 methanogens 49 sunspots 49 wavefunction 49 S/# P2 49 star Beta Pictoris 49 moons Phobos 49 gamma ray photons 49 radioactive decay 49 SNe Ia 49 Mini TES 49 X ray observatory 49 galaxy NGC# 49 RS Oph 49 organelles 49 faintest galaxies 49 zodiacal light 49 distant supernovas 49 spectra 49 Martian dust 49 asteroid impacts 49 planet Gliese #g 49 jovian 49 filamentary structures 49 brightnesses 49 nebulas 49 muon neutrino 49 colloidal crystals 49 Orion constellation 49 Comet Halley 49 Pegasi 49 basaltic rocks 49 supersymmetry 49 Comet Machholz 49 gravitational attraction 49 relativistic jets 49 zircons 49 Gamma rays 49 spectroscopic 49 WHIM 49 exoplanets planets 49 Betelgeuse 49 Komossa 49 cometary 49 Wilkinson Microwave Anisotropy Probe 49 Quadrantids 49 Mandushev 49 silicate crystals 49 Jupiter gravitational pull 49 UCDs 49 superheavy elements 49 cosmological models 49 Supernovas 49 Haumea 49 Neptune Uranus 49 meteorite bombardment 49 Earth asteroids 49 moon Io 49 deuterium atoms 49 energetic gamma rays 49 planet magnetosphere 49 stellar occultation 49 X ray pulses 49 meteoroid impacts 49 chromosphere 49 UDFy # 49 Baptistina 49 radial velocity technique 49 Tevatron experiments 49 VHE gamma rays 49 VB #b 49 quasiparticles 49 ferric oxides 49 CMB photons 49 galaxy Andromeda 49 chondritic 49 star Proxima Centauri 49 Ring Nebula 49 mantle plumes 49 Jupiter moon Io 49 microlensing 49 volcanic moon Io 49 cometary dust 49 WFPC2 49 Tunguska asteroid 49 jarosite 49 quanta 49 extrasolar planetary 49 suns 49 numerical simulations 49 antihydrogen atoms 49 isotopic composition 49 comet dust 49 PSR B# +# 49 celestial phenomena 49 Fomalhaut 49 plutons 49 undiscovered particle 48 wavelengths 48 BECs 48 Delta Cephei 48 Cold Dark Matter 48 van Dokkum 48 ROSAT 48 Iapetus 48 Astrophysical 48 infrared spectra 48 Pleiades cluster 48 superfluid 48 fainter 48 ionized gases 48 Jovian moon 48 Tianyulong 48 coronal mass ejections 48 meteorite impacts 48 tidally 48 exciton 48 unaided eye 48 orbiting 48 ESO PR 48 pyroxene 48 comets asteroids 48 protons 48 Trapezium 48 planets circling stars 48 antiferromagnets 48 Konacki 48 cosmic cannibal 48 Mpc 48 dimming starlight 48 infalling gas 48 particle detectors 48 Io Europa 48 IRC +# 48 dust enshrouded 48 magnetic reconnection 48 YORP effect 48 supernova SN 48 Garth Illingworth 48 HiRISE image 48 Asteroid Belt 48 Neutral Mass Spectrometer 48 Weakly Interacting Massive Particles 48 comet McNaught 48 Exoplanet 48 branes 48 gamma ray flares 48 Carnegie Observatories 48 ultracold atoms 48 Galileo spacecraft 48 meteor impacts 48 occulted 48 torus 48 Wolfgang Brandner 48 nebula NGC 48 equatorial regions 48 gravity warps 48 Saturnian moons 48 dwarf spheroidal 48 hydrogen nuclei 48 electroweak 48 NASA Wilkinson Microwave 48 relativistic protons 48 Lagoon Nebula 48 galaxy redshift 48 excitations 48 cosmological 48 fermion 48 solar minima 48 coronal holes 48 B meson 48 earths 48 habitable planet 48 sparticles 48 gamma ray emitting 48 Leonids 48 bosonic 48 potassium atoms 48 Avishay Gal Yam 48 chlorophyll molecules 48 gamma rays emitted 48 superheavy element 48 theoretical particle 48 diffuse aurora 48 corona 48 polarimetry 48 rubidium atoms 48 atomic particles 48 spiral galaxy M# 48 orbitals 48 asterism 48 Orionid 48 Pleiades star 48 Geminid 48 gaseous envelope 48 Saturn moon 48 R Coronae Borealis 48 valence electrons 48 photons particles 48 impactor 48 SDSS 48 comet Hale Bopp 48 Anisotropy Probe WMAP 48 RMC #a 48 prominences 48 polar vortex 48 singularities 48 Caloris 48 sulfate aerosols 48 auroral 48 Keck telescope 48 oxygen atoms 48 Helix Nebula 48 Lutetia 48 highly magnetized neutron 48 supersolid 48 antimatter atoms 48 Tempel 1 48 Type 1a supernova 48 electron density 47 inner Oort Cloud 47 coronal heating 47 comet Tempel Tuttle 47 molecules 47 Galactic cosmic rays 47 massless particles 47 antihelium 4 47 hadrons 47 Pegasus constellation 47 submillimeter wavelengths 47 silica particles 47 ULP cepheids