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(Click for frequent words.) 75 rocky planets 72 brown dwarfs 71 exoplanets 71 transiting planets 70 planets orbiting sun 70 planets orbiting 69 planets 69 Earthlike planets 69 CoRoT 7b 68 terrestrial planets 68 extrasolar planets 68 WASP #b 68 hot Jupiters 68 habitable planets 67 planets orbiting distant 67 exoplanet 67 sunlike stars 67 red supergiant 66 brown dwarf 66 millisecond pulsars 66 gaseous planet 66 extrasolar planets orbiting 66 habitable zones 66 exoplanets orbiting 65 GRBs 65 extrasolar 65 KBOs 65 planets orbiting stars 65 SN #gy 65 planemos 65 GJ#b 65 globular clusters 65 Beta Pictoris b 64 habitable zone 64 hypervelocity stars 64 Kuiper belt objects 64 extrasolar planet 64 potentially habitable 64 GJ #b [001] 64 starburst galaxies 64 Kuiper Belt object 64 planet orbiting 64 planetary nebulae 64 CoRoT #b 64 smallest exoplanet 64 dwarf galaxies 64 X ray binary 64 moons orbiting 64 icy moons 64 Gliese #g 64 Kuiper belt 63 Gliese #c 63 Earthlike planet 63 TrES 4 63 Corot 7b 63 gaseous planets 63 magnetars 63 Kuiper Belt objects 63 planet orbits 63 Galilean moons 63 red supergiants 63 Earthlike 63 exoplanet orbiting 62 gravitationally bound 62 Epsilon Eridani 62 Kepler #b 62 protoplanetary disks 62 supermassive 62 habitable planet 62 X ray binaries 62 luminous galaxies 62 elliptical galaxies 62 HD #b [002] 62 lunar crust 61 Gliese #d 61 redshifts 61 protoplanet 61 HL Tau 61 star Gliese 61 Super Earths 61 merging galaxies 61 distant supernovae 61 sized planets orbiting 61 globular cluster 60 AGNs 60 HD#b 60 AU Mic 60 galaxy clusters 60 supersymmetric particles 60 Antennae Galaxies 60 Cancri e 60 planets circling stars 60 planets circling 60 planet HD #b 60 phyllosilicates 60 galaxies 60 protostars 60 quasars 60 transiting planet 60 gravitational microlensing 60 magnetar 60 BP Piscium 60 Hot Jupiters 60 planets orbits 60 Cancri 59 exoplanetary 59 UB# [003] 59 elliptical galaxy 59 planets astronomers 59 radial velocity 59 comets orbiting 59 Upsilon Andromedae 59 type Ia supernovae 59 supernova remnants 59 Saturn moons 59 metallicity 59 TrES 59 active galactic nuclei 59 redshift 59 Eta Carinae 59 Type Ia supernova 59 ULIRGs 59 supernovae 59 GJ #b [002] 59 protoplanetary disk 59 Kuiper Belt Objects 59 Higgs particle 59 axions 59 Goldilocks zone 59 planetesimals 59 Omega Centauri 59 novae 59 exo planets 59 supermassive black holes 59 reionization 59 Higgs bosons 58 protoplanets 58 Milky Way halo 58 retrograde orbits 58 habitable worlds 58 solar nebula 58 Hubble observations 58 Neutron stars 58 chondrules 58 brightest supernova 58 Milky Way Galaxy 58 Pluto Charon 58 Wolf Rayet star 58 neutron star 58 asteroids 58 stellar nurseries 58 BLG #Lb 58 Zeta Ophiuchi 58 comets 58 Wolszczan 58 galaxy formation 58 asteroids orbiting 58 giant gaseous planets 58 dwarf planets 58 planetary embryos 58 globulars 58 BP Psc 58 Earth asteroids 58 Goldilocks planet 58 Jovian moons 58 inhabitable planets 58 electron neutrinos 58 hydrated minerals 58 WIMPs 58 Gamma ray bursts 58 Oort cloud 58 sunlike star 58 distant galaxy 58 eccentric orbits 58 galaxy cluster 58 elongated orbits 58 neutron stars 58 planet Gliese #g 57 elliptical orbits 57 faint galaxies 57 VB #b 57 magma ocean 57 Wolf Rayet stars 57 Quaoar 57 OGLE TR #b 57 Beta Pictoris 57 supernovas 57 Fomalhaut b 57 pulsars 57 R#a# 57 supernova explosions 57 Pluto Eris 57 Sedna 57 Earths 57 supernova explosion 57 SMM J# 57 dwarf galaxy 57 chondrites 57 millisecond pulsar 57 gravitational interactions 57 proplyds 57 Martian meteorites 57 X ray wavelengths 57 Kuiper belt object 57 NASA Kepler spacecraft 57 RRATs 57 potentially habitable planets 57 Gliese 57 protostar 57 Cepheids 57 CoRoT satellite 57 extrasolar planetary systems 57 moon Europa 57 spiral galaxies 57 supergiant stars 56 Kepler 9c 56 dirty snowballs 56 orbits 56 Galilean satellites 56 COROT 7b 56 exoplanetary systems 56 quasar 56 Type Ia supernovae 56 NASA Kepler 56 Milky Way galaxy 56 moons Phobos 56 quark gluon plasma 56 moonlets 56 SMBHs 56 NASA twin rovers 56 trans Neptunian objects 56 exo planet 56 CoRoT 9b 56 GRB #B 56 intrinsic brightness 56 Jupiter icy moons 56 HARPS spectrograph attached 56 baryonic 56 X ray emission 56 equatorial regions 56 Orion Nebula 56 blue supergiant 56 Astronomers 56 astronomers 56 plutoids 56 Eridani 56 moons 56 Kuiper Belt 56 Andromeda Galaxy 56 baryons 56 COROT 56 microlensing events 56 eclipsing binary 55 silicate dust 55 asteroids comets 55 supergiants 55 Gliese #e 55 Henize #-# 55 Arches Cluster 55 interstellar clouds 55 X ray telescopes 55 interacting galaxies 55 organic molecules 55 CAIs 55 X ray observatories 55 Magnetars 55 accretion disks 55 Bug Nebula 55 luminosities 55 distant quasars 55 icy comets 55 spectroscopic observations 55 eclipsing binaries 55 neutralino 55 submillimeter galaxies 55 deep convective clouds 55 supersymmetry 55 Andromeda galaxy 55 planet WASP #b 55 SN #A 55 Triangulum 55 Oort Cloud 55 HAT P 55 Jovian moon 55 smallest extrasolar planet 55 protoplanetary discs 55 planet Gliese #c 55 distant galaxies 55 gamma ray bursts 55 Kuiper Belt Object 55 gravitational lenses 55 Higgs boson particle 55 missing baryons 55 occultations 55 carbonaceous chondrites 55 transiting exoplanets 55 lunar perigee 55 radial velocity method 55 innermost planet 55 S/# P2 55 AB Aurigae 55 Extrasolar planets 55 Cosmologists 55 fainter objects 55 plutons 55 planetary nebula 55 hypervelocity star 55 exoplanets planets outside 55 nebular 55 hematite mineral 55 Earths orbiting 55 Corot 9b 55 type Ia supernova 55 constellation Hercules 55 retrograde orbit 54 Large Magellanic Cloud 54 IntergalaticEarth 54 neutralinos 54 asteroid Ceres 54 mu Arae 54 spiral nebulae 54 proto planetary disks 54 transiting exoplanet 54 BLG #L 54 neutrino mass 54 proto galaxies 54 star Proxima Centauri 54 zodiacal dust 54 Milky Way 54 Upsilon Andromedae b 54 TNOs 54 outer planets 54 comets asteroids 54 William Borucki 54 astronomical objects 54 biosignatures 54 planetoids 54 tholins 54 carbonate minerals 54 exosphere 54 QQ# 54 Betelgeuse 54 Red Rectangle 54 galactic cosmic rays 54 blazars 54 interstellar dust clouds 54 rotating neutron stars 54 ultraviolet wavelengths 54 tau neutrinos 54 SDSS II 54 planets Uranus 54 moon Charon 54 antiparticle 54 Uranus Neptune 54 permanently shadowed craters 54 exoplanet discoveries 54 Small Magellanic Cloud 54 hydrogen helium 54 Cepheid variables 54 galaxy M# [002] 54 nucleosynthesis 54 subsurface ocean 54 Type 1a supernovae 54 constellation Lyra 54 impactors 54 galactic mergers 54 baryonic matter 54 mesons 54 Maunder minimum 54 J# +# [002] 54 Magellanic Clouds 54 Noctilucent clouds 54 interstellar dust grains 54 GeV 54 coccolithophores 54 globular star 54 dense clumps 54 asteroid 54 supernovae explode 54 moon Ganymede 53 XMM Newton 53 noctilucent clouds 53 circular orbits 53 planetary transits 53 V# Mon 53 extragalactic 53 binary asteroid 53 constellation Virgo 53 stellar occultations 53 Mandushev 53 Proxima Centauri 53 Konacki 53 CoRoT 53 earthlike planets 53 HD# [002] 53 Astrophysicists 53 supergiant star 53 constellation Cassiopeia 53 supernova 53 planet TrES 53 Exoplanets 53 Microlensing 53 nucleobases 53 Jupiter moon Io 53 PSR J# +# 53 filamentary structure 53 galactic clusters 53 moons orbiting Saturn 53 PSR J# 53 spherically symmetric 53 Jupiter Ganymede 53 abundances 53 polarimetry 53 XTE J# 53 baryon 53 gamma ray burst 53 solar corona 53 Christophe Lovis 53 microlensing 53 supermassive black hole 53 Trojan asteroids 53 planetary 53 Saturn moon 53 RS Ophiuchi 53 cosmological distances 53 cosmologists 53 SN#A 53 distant quasar 53 axial tilt 53 Spitzer Space Telescope 53 cosmic phenomena 53 Toutatis 53 supersymmetric 53 silicon monoxide 53 starburst galaxy 53 Enceladus 53 Epsilon Aurigae 53 GQ Lupi 53 celestial object 53 galactic disk 53 Pluto moon Charon 53 subatomic particle 53 Geminids 53 colliders 53 asteroid impacts 53 planetoid 52 spacecraft flyby 52 theoretical particle 52 AUs 52 VY Canis Majoris 52 Virgo Cluster 52 masers 52 Globular clusters 52 Stephan Quintet 52 TGFs 52 Higgs Boson 52 supervolcanoes 52 solar neutrinos 52 suns 52 Sasselov 52 giant elliptical galaxy 52 Quadrantids 52 G#.# +#.# 52 photosphere 52 perihelion 52 Pegasi 52 SUSY 52 #P/Churyumov-Gerasimenko 52 smallest exoplanets 52 circumstellar disks 52 distant galaxy clusters 52 solar radii 52 sterile neutrinos 52 GRB # 52 cosmic cannibal 52 radial velocity technique 52 optical telescopes 52 SMBH 52 UDFy # 52 R Coronae Borealis 52 spinning neutron stars 52 Jupiter Saturn Uranus 52 astrobiologists 52 Comet Holmes 52 Samuel Oschin Telescope 52 S/# P 52 dimming starlight 52 Meridiani 52 moon Enceladus 52 olivine 52 elongated orbit 52 antineutrinos 52 rocky terrestrial planets 52 microbial ecosystems 52 silicates 52 moonlet 52 Murchison meteorite 52 nebulae 52 constellation Cygnus 52 carbonate globules 52 blue straggler 52 magnetic monopoles 52 P/# A2 52 planet Uranus 52 chemical abundances 52 MG J# +# 52 exoplanets planets 52 Venusian atmosphere 52 spherules 52 GALEX 52 outermost planets 52 ultraluminous galaxy 52 astrophysical objects 52 HM Cancri 52 SN #C 52 Orionids 52 ESA XMM Newton 52 relativistic particles 52 Lake Vostok 52 scarps 52 proto planetary disk 51 ALH# 51 super Earths orbiting 51 gravitationally 51 dynamical evolution 51 nuclei 51 tungsten isotopes 51 Solar TErrestrial RElations Observatory 51 Fermi telescope 51 Kepler Telescope 51 mesosphere 51 Type Ia 51 Martian rovers 51 meteoritic material 51 Ulysses spacecraft 51 gamma ray emission 51 Gondolo 51 meteoroids 51 NEOs 51 neutrinos 51 Mpc 51 prokaryotes 51 accretion disk 51 chromosphere 51 moon Mab 51 Saturn rings 51 cluster NGC 51 intracluster 51 interglacial periods 51 Kazantzidis 51 telescopes astronomers 51 gravitational lens 51 supermassive stars 51 Pleiades cluster 51 fainter 51 coronal loops 51 deuterium 51 asteroidal 51 Orion nebula 51 Seyfert galaxies 51 Fornax cluster 51 supernova remnant 51 pulsar 51 circumstellar disk 51 infrared wavelengths 51 NASA Kepler telescope 51 binary asteroids 51 Virgo cluster 51 Cosmic rays 51 constellation Aquarius 51 Carina constellation 51 NEAs 51 Saturn moon Enceladus 51 crystalline silicates 51 extrasolar worlds 51 spatial dimensions 51 proto cluster 51 muon neutrinos 51 SIM PlanetQuest 51 Saturn outermost ring 51 geologically active 51 Bose Einstein condensates 51 unmanned probes 51 helium nuclei 51 unaided eye 51 jarosite 51 OGLE 51 microquasar 51 exosolar planets 51 primitive meteorites 51 Kepler 9b 51 single celled organisms 51 Coma Cluster 51 IRC +# 51 dustier stormier atmosphere 51 galaxy 51 Earth radii 51 astrometry 51 interstellar cloud 51 OGLE TR 51 Makemake 51 Type Ia supernovas 51 orbiting Gliese 51 orbiting 51 occulted 51 Io Europa 51 APXS 51 antimatter particles 51 meteor impacts 51 antihydrogen atoms 51 W boson 51 antihelium 51 Elliptical galaxies 51 constellation Taurus 51 NASA Fermi Gamma 51 blazar 51 redshifted 51 Bok globules 51 orbital resonance 51 Hale Bopp 51 volcanic moon Io 51 gravitational pulls 51 distant supernovas 51 Saturn magnetosphere 51 CERN experiments 51 Io Europa Ganymede 51 galaxies collide 51 helium atoms 51 heavily cratered 51 astrophysicists 51 cosmological theories 51 COROT exo 3b 51 nicknamed Xena 51 gravitational lensing 51 outermost planet 51 RX J# 51 XO 3b 51 redshift z = 51 planetesimal 51 planetary Transits 51 Pieter van Dokkum 51 undersea volcanoes 50 Sagittarius B2 50 tidally locked 50 comet McNaught 50 superheavy elements 50 highly elliptical orbits 50 tidal bulge 50 Crab Nebula 50 HIRES spectrometer 50 neutrino oscillation 50 positrons 50 Dwarf galaxies 50 lunar meteorites 50 substorms 50 moon Titan 50 methanogens 50 neutrino detectors 50 Titan Saturn 50 isotopic compositions 50 constellation Cetus 50 Mercury magnetosphere 50 HD #b [001] 50 spatially resolved 50 observable universe 50 smallest exoplanet ever 50 GZK cutoff 50 photosynthetic organisms 50 Delta Cephei 50 comet 50 Hanny Voorwerp 50 planets comets 50 antihelium 4 50 Kepler spacecraft 50 Pulsars 50 constellation Ursa Major 50 Comet Hale Bopp 50 Comet NEAT 50 coronal mass ejections CMEs 50 orbiting observatories 50 presolar grains 50 Ring Nebula 50 SNe Ia 50 Cat Paw Nebula 50 Astrophysics Cambridge Mass. 50 gravitational wobbles 50 muons 50 van Dokkum 50 ray Space Telescope 50 asteroid Vesta 50 placental mammals 50 NASA Chandra 50 gamma ray flares 50 metalloproteins 50 KH #D 50 supercontinent 50 Stephane Udry 50 volcanically active 50 galactic cores 50 orbital eccentricity 50 Jupiter moons 50 Cosmic Microwave Background 50 Gamma rays 50 Haumea 50 Saturnian 50 planetary orbits 50 orbited Jupiter 50 aurorae 50 B mesons 50 thermonuclear reactions 50 X ray Observatory 50 VLTI 50 neutrino 50 sterile neutrino 50 cyanobacteria 50 substorm 50 ionized hydrogen 50 SN #E 50 largest moon Charon 50 Jupiter Uranus 50 giant elliptical galaxies 50 shorter wavelengths 50 HIP #b 50 Optical Gravitational Lensing Experiment 50 super perigee moon 50 ULP cepheids 50 periodic dimming 50 Pegasus constellation 50 aerosol particles 50 earths 50 sextillion stars 50 Pegasi b 50 arcseconds 50 leptons 50 Ontario Lacus 50 YORP effect 50 energetic cosmic rays 50 UCDs 50 galactic halo 50 Saturn aurora 50 isotopic ratios 50 hydrothermal vent 50 planets moons 50 protoplanetary 50 Jupiter Saturn 50 #gy 50 interstellar dust particles 50 Herschel Space Telescope 50 strange quarks 50 SN #D 50 outer corona 50 lobate scarps 50 interstellar grains 50 unicellular organisms 50 Churyumov Gerasimenko 50 sunspot 50 isotopic composition 50 extrasolar planetary 50 cosmic microwave radiation 50 barred spiral galaxy 50 gravitational interaction 50 Nikku Madhusudhan 50 galactic nuclei 50 interstellar molecules 49 lavas 49 spherical halo 49 circumstellar 49 infrared spectra 49 telescopic observations 49 constellation Sagittarius 49 Epsilon Indi 49 SIRTF 49 spectral signatures 49 magnetospheric 49 northern latitudes 49 Planck satellite 49 Neptune Uranus 49 Gravitational waves 49 constellation Centaurus 49 X ray pulses 49 gamma ray observatory 49 lensing galaxy 49 ionized gas 49 orbiting Cassini spacecraft 49 electron neutrino 49 solar minima 49 Alex Filippenko 49 waxing crescent 49 gravitational waves 49 primitive organisms 49 nebula 49 HARPS instrument 49 galaxy M# [001] 49 submillimeter wavelengths 49 silicate crystals 49 Palaeocene Eocene Thermal Maximum 49 muon neutrino 49 afterglows 49 eukaryote 49 sunspot cycle 49 sparticles 49 gravitational tides 49 ultracold atoms 49 ringed planet 49 NASA Wilkinson Microwave 49 sulfate aerosols 49 cosmological models 49 Sagittarius dwarf galaxy 49 Bose Einstein condensate 49 Alfven waves 49 carbonaceous chondrite 49 nucleons 49 gravitational attraction 49 prebiotic molecules 49 asterism 49 infrared telescopes 49 optical wavelengths 49 planet HD#b 49 Wilkinson Microwave Anisotropy Probe 49 asteroid belt 49 X ray emitting 49 spiral galaxy 49 active galactic nucleus 49 STEREO spacecraft 49 mantle plumes 49 RXTE 49 Tunguska asteroid 49 Saturn Enceladus 49 Higgs boson 49 Higgs Boson particle 49 boson 49 Perseus Cluster 49 geostationary orbits 49 stromatolites 49 clathrates 49 jovian 49 silicate mantle 49 moons Europa 49 constellation Carina 49 infall 49 Tevatron experiments 49 strangelet 49 galaxy NGC 49 WMAP satellite 49 stony meteorites 49 celestial objects 49 Galaxy Evolution 49 comet nuclei 49 spectroscopically 49 polar vortex 49 Wide Angle Search 49 Geminga 49 cosmic microwave background 49 spicule 49 Hubble Space Telescope HST 49 cometary material 49 geoneutrinos 49 magnetospheres 49 Supernovae 49 reionization epoch 49 Milankovitch cycles 49 polar stratospheric 49 # Apophis 49 habitability 49 energetic electrons 49 Trapezium 49 Tarantula Nebula 49 Alfvén waves 49 antiparticles 49 hydrothermal vents 49 dwarf planet 49 Neptunian 49 microplastics 49 highly magnetized neutron 49 electronvolts 49 Fomalhaut 49 Martian equator 49 olivine mineral 49 gaseous envelope 49 cosmic ray collisions 49 Grillmair 48 Puppis 48 dwarf spheroidal galaxies 48 Cygnus Lyra region 48 Herschel Space 48 archaea 48 Geminid 48 planetary nebulas 48 multicellular animals 48 Syrtis Major 48 ostracods 48 Lyrids 48 particle smasher 48 constellation Libra 48 HARPS spectrograph 48 martian meteorites 48 KT boundary 48 sodium atoms 48 Nasa Kepler 48 De Pontieu 48 -# degrees Fahrenheit [002] 48 lunar poles 48 infrared observatory 48 Exoplanet 48 ejecta 48 Viking landers 48 basaltic rocks 48 exoplanet atmospheres 48 Quadrantid meteor shower 48 neutrino telescope 48 Cassini flyby 48 star Spica 48 Lagoon Nebula 48 Viking orbiters 48 -# degrees centigrade [001] 48 colliding galaxies 48 tropical latitudes 48 spicules 48 WD5 48 Leonids 48 permanently shadowed regions 48 extremophiles 48 single celled algae 48 neutron spectrometer 48 PSR B# +# 48 Cygnus X 48 Svedhem 48 Hesperian epoch 48 millimeter wavelength 48 protons collide 48 highly elliptical orbit 48 PASADENA Calif. Astronomers 48 ostracodes 48 polar latitudes 48 Supermassive black 48 Asteroid Belt 48 hydrogen atoms 48 Triangulum Galaxy 48 lunar craters 48 fermion 48 gravitational redshift 48 constellation Eridanus 48 SN Ia 48 inner moons 48 nucleon 48 gravitational tugs 48 noble gases 48 single celled 48 orbiting Kepler telescope 48 gamma rays emitted 48 Evolution Explorer 48 undiscovered particle 48 orbits Saturn 48 neutrons 48 Gaensler 48 single celled microorganisms 48 orbiting planets 48 femtoseconds 48 X ray observatory 48 unicellular 48 MESSENGER MErcury Surface 48 interstellar dust 48 midlatitudes 48 mineral olivine 48 GLAST telescope 48 B meson 48 perigee 48 planets asteroids 48 worm Caenorhabditis elegans 48 atomic nuclei 48 atoms 48 relativistic jets 48 supernovae explosions 48 Iapetus 48 radioactive nuclei 48 aerosol concentrations 48 cryovolcanism 48 gravitationally lensed 48 sextillion 48 southern supercontinent 48 oxygen isotopes 48 Lyman alpha 48 comet Lulin 48 Crab Pulsar 48 Comet Hartley 2 48 Keck telescope 48 SN #cr 48 meteorite impacts 48 planets Kepler 48 glaciations 48 electron muon 48 Wilkinson Microwave Probe 48 accreting 48 polar caps 48 Geminid meteors 48 Ranging spacecraft 48 Spiral galaxies 48 electroweak 48 polar orbits