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(Click for frequent words.) 68 Earthlike planets 67 extrasolar 66 Konacki 65 Jovian moon 65 Upsilon Andromedae 65 exoplanet orbiting 65 Corot 7b 64 exoplanetary 64 Gliese #c 64 rocky planets 64 WASP #b 64 Sasselov 63 distant supernovae 63 BP Psc 63 habitable worlds 63 habitable planets 63 CoRoT 9b 63 Kuiper belt objects 62 Mandushev 62 exo planet 62 inhabitable planets 62 AB Aurigae 62 Foing 62 astrophysical phenomena 61 Evolution Explorer 61 extrasolar planet 61 CoRoT satellite 61 millisecond pulsars 61 TrES 4 61 sunlike star 61 exo planets 61 planets orbiting distant 61 gravitational microlensing 61 gaseous planet 61 GJ#b 61 terrestrial planets 61 Delta Cephei 61 comets orbiting 61 extrasolar planets 61 Saturn Cassini 61 extrasolar planets orbiting 60 Earthlike 60 moons orbiting 60 BP Piscium 60 potentially habitable planets 60 Jenniskens 60 Grillmair 60 Earthlike planet 60 GJ #b [001] 60 planets 60 IRC +# 60 Filippenko 60 highly elliptical orbits 60 ESA Integral 60 Gliese #d 60 Galileo spacecraft 60 Kepler Mission 60 Fomalhaut b 60 planets orbiting sun 59 interstellar cloud 59 magnetar 59 millisecond pulsar 59 magma ocean 59 Cancri e 59 NASA Kepler spacecraft 59 hypervelocity stars 59 Corot 9b 59 planetary astronomy 59 COROT 59 SN #gy 59 Giovanni Cassini 59 Galilean moons 59 magnetars 59 planetary orbits 59 extrasolar planetary systems 59 Gaensler 59 dwarf galaxies 59 stellar nurseries 59 Kuiper Belt Objects 59 HD#b 59 planets circling 59 Andromeda galaxy 59 icy moons 59 Spudis 59 Stephane Udry 59 smallest exoplanet 59 planetary transits 59 radial velocity technique 59 GJ #b [002] 59 Charles Beichman 59 protoplanetary disk 59 planets orbiting 59 protoplanet 58 eclipsing binary 58 comet McNaught 58 asteroseismology 58 exoplanets 58 Lunine 58 Kepler 9c 58 Planck satellite 58 planetary nebulae 58 Epsilon Aurigae 58 sunlike stars 58 Avishay Gal Yam 58 lunar crust 58 PSR B# +# 58 Maunder minimum 58 X ray observatory 58 sized planets orbiting 58 VY Canis Majoris 58 sterile neutrino 58 Gerard Kuiper 58 XMM Newton 58 super Earths 58 Comet Hale Bopp 58 circumstellar 58 Schawinski 58 planet HD #b 58 blue supergiant 58 Super Earths 58 SN #A 58 OGLE TR #b 58 Rainer Klement 58 planets orbiting stars 58 globular clusters 58 distant supernovas 58 planets Uranus 58 exoplanets orbiting 58 Orion nebula 58 solar corona 58 Bill Borucki Kepler 58 Higgs bosons 58 noctilucent clouds 58 Squyres Cornell 58 planetary atmospheres 58 Kazantzidis 58 Reinhard Genzel 57 Supernova #A 57 Ulysses spacecraft 57 Comet Machholz 57 Charon Pluto 57 Hörst 57 globulars 57 Alex Filippenko 57 Zeta Ophiuchi 57 Keck telescope 57 habitable zones 57 Mamajek 57 axion 57 stellar seismology 57 ESA XMM Newton 57 Xavier Delfosse 57 Bug Nebula 57 COROT 7b 57 supernova explosion 57 Hot Jupiters 57 Kepler #b 57 Smithsonian astronomer 57 infrared astronomy 57 microlensing events 57 supersymmetric particles 57 asteroidal 57 comets asteroids 57 Gliese #e 57 exoplanet 57 Saturn rings 57 HL Tau 57 subsurface ocean 57 Omega Centauri 57 Cassini Huygens 57 CoRoT 7b 57 protostar 57 lunar craters 57 red supergiant 57 Andrea Ghez 57 Type Ia supernova 57 twin Voyager spacecraft 57 gamma ray observatory 57 habitable planet 57 accretion disks 57 Dan Werthimer 57 Sara Seager 57 brown dwarfs 57 zodiacal dust 57 Bernard Foing 57 Toutatis 57 stellar occultations 57 Eta Carinae 57 airglow 57 Solar System 57 ESO VLT 57 Jedicke 56 Gliese #g 56 Kailash Sahu 56 interstellar dust grains 56 planetary Transits 56 Proxima Centauri 56 HD #b [002] 56 planet Gliese #g 56 Comet Halley 56 Cosmic Microwave Background 56 RXTE 56 coronal loops 56 astrobiologists 56 Mojzsis 56 exosphere 56 elliptical galaxy 56 astronomical objects 56 Samuel Oschin Telescope 56 infrared observatory 56 comet Hale Bopp 56 masers 56 X ray binaries 56 Galaxy Evolution 56 Venusian atmosphere 56 planets orbits 56 Krimigis 56 Comet Elenin 56 meteoroid impacts 56 retrograde orbit 56 Galactic cosmic rays 56 particle colliders 56 protoplanetary disks 56 Gal Yam 56 Galilean satellites 56 Martian rovers 56 supergiant star 56 planet orbits 56 Kuiper Belt Object 56 cosmic cannibal 56 BLG #Lb 56 Upsilon Andromedae b 56 Type 1a supernovae 56 Epsilon Eridani 56 moon Europa 56 Saturn Enceladus 56 Saturnian moon 56 planemos 56 Fermi telescope 56 distant galaxy 56 retrograde orbits 56 planetesimals 56 Herschel Space Telescope 56 Geminga 56 Zarnecki 56 Gondolo 55 Kuiper belt 55 Nasa spacecraft 55 transiting exoplanet 55 constellation Cassiopeia 55 supernova 55 permanently shadowed craters 55 planet orbiting 55 astrometry 55 elongated orbits 55 Red Rectangle 55 Sigurd Hofmann 55 moon Mab 55 Ken Edgett 55 Natalie Batalha 55 Type Ia supernovae 55 interstellar dust clouds 55 X ray telescopes 55 Marchis 55 V# Sgr 55 axions 55 Pieter van Dokkum 55 GRBs 55 Bruce Jakosky 55 filamentary structure 55 SIRTF 55 HM Cancri 55 icy comets 55 Exoplanets 55 Stassun 55 unmanned probes 55 Beta Pictoris b 55 neutron star 55 planets atmospheres 55 cosmological distances 55 Werthimer 55 Gehrels 55 spacecraft Cassini 55 Halzen 55 protoplanets 55 Gael Chauvin 55 Jean Pierre Lebreton 55 elliptical galaxies 55 Cepheid variables 55 V# Mon 55 moons circling 55 Jonathan Lunine 55 Higgs particle 55 Rosetta lander 55 extragalactic 55 radial velocity 55 brightest supernova 55 planetary 55 detect gravitational waves 55 Milky Way halo 55 Pluto Charon 55 starburst galaxy 55 Oort Cloud 55 astronomer 55 particle smasher 55 Gamma ray burst 55 starburst galaxies 55 Carnegie Observatories 55 X ray binary 55 luminous galaxies 55 protostars 55 Marc Kuchner 55 X ray wavelengths 55 Michael Flasar 55 tholins 55 exoplanet atmospheres 55 cosmic ray particles 55 Uranus Neptune 55 asteroid collisions 55 Franck Marchis 55 Jovian moons 55 Adam Riess 55 planets astronomers 55 planet Uranus 55 potentially habitable 55 Cassini radar 55 Caltech astronomer 55 planets comets 55 Bindschadler 55 Gnedin 55 star Gliese 55 Extrasolar planets 55 Crab Nebula 55 polar craters 55 Jakosky 55 Io Europa 55 UDFy # 55 gamma ray burst 55 RRATs 55 Hawking radiation 55 SEGUE 54 mu Arae 54 occultations 54 moons Phobos 54 transiting planets 54 Astrophysics Cambridge Mass. 54 Christophe Lovis 54 subatomic particle 54 KBOs 54 Elenin 54 comet 54 type Ia supernovae 54 Earths orbiting 54 infall 54 planetary nebulas 54 Sushil Atreya 54 Comet Hartley 2 54 Charles Elachi 54 de Pater 54 Martian crater 54 exosolar planets 54 P/# A2 54 galaxies collide 54 supernovae 54 Martian craters 54 Submillimeter Array 54 Chandra Wickramasinghe 54 supernovas 54 constellation Hercules 54 Crab Pulsar 54 astronomers 54 KH #D 54 RHESSI 54 outer planets 54 Martian meteorites 54 Huygens mission 54 planetoid 54 colliders 54 periodic dimming 54 HD #b [001] 54 interstellar clouds 54 substorm 54 celestial object 54 Milky Way galaxy 54 telescopic observations 54 interplanetary spacecraft 54 boson 54 Grammier 54 type Ia supernova 54 Svedhem 54 Ziurys 54 Churyumov Gerasimenko 54 ray Space Telescope 54 X ray emission 54 neutralinos 54 Fritz Zwicky 54 prebiotic molecules 54 Ghez 54 galaxy M# [001] 54 astrobiological 54 HD# [002] 54 earthlike planets 54 active galactic nuclei 54 magnetic monopoles 54 supergiant stars 54 comet Lulin 54 chondrules 54 ESO astronomer 54 constellation Eridanus 54 photosphere 54 comet nucleus 54 tidal bulge 54 distant galaxies 54 Vassilis Angelopoulos 54 Jupiter moon Io 54 HARPS instrument 54 Arches Cluster 54 eccentric orbits 54 Anthony Remijan 54 Nikku Madhusudhan 54 X ray afterglow 54 Bottke 54 outermost planets 54 Murchison meteorite 54 galactic disk 54 Greg Delory 54 renowned cosmologist 54 muon neutrinos 54 spectroscopically 54 electron neutrinos 54 cosmic magnifying glass 54 moon Charon 54 Hubble observations 54 Herschel telescope 54 neutrino particles 54 elliptical orbits 54 Solar TErrestrial RElations Observatory 54 THEMIS satellites 54 supermassive 54 carbonaceous chondrite 54 Gerhard Schwehm 54 infrared telescopes 54 merging galaxies 54 Gliese #G 54 NASA Kepler telescope 54 Peony nebula star 54 SETI Search 54 proto galaxies 54 Comet Lulin 54 carbonaceous chondrites 54 Saul Perlmutter 54 Goldilocks planet 54 La Silla observatory 54 exobiology 54 ESA Cluster 54 novae 54 planets moons 54 astrometric 54 GLAST telescope 54 Linda Spilker Cassini 54 galaxies 54 binary asteroids 54 David Southwood ESA 54 carbonate globules 54 novas 54 cosmological theories 54 dwarf galaxy 53 celestial phenomena 53 galactic mergers 53 planetary scientist 53 Keck Interferometer 53 William Borucki Kepler 53 galaxy M# [002] 53 NuSTAR 53 binary asteroid 53 blazars 53 Beta Pictoris 53 NASA THEMIS 53 Michael Zolensky 53 Ed Weiler 53 pulsars 53 PSR J# 53 GQ Lupi 53 Eric Becklin 53 R Coronae Borealis 53 magnetospheres 53 planet TrES 53 SDSS II 53 Alfven waves 53 Saturn magnetosphere 53 Vakoch 53 Jacques Laskar 53 transiting exoplanets 53 Wolf Rayet star 53 cosmic phenomena 53 red supergiants 53 circumstellar disks 53 supernova remnants 53 zodiacal light 53 planetary nebula 53 Tarduno 53 Neutron stars 53 supernova explosions 53 accretion disk 53 Carina constellation 53 Wilkinson Microwave Anisotropy Probe 53 spinning neutron stars 53 distant quasars 53 Kuiper Belt objects 53 planetary astronomer 53 SN #C 53 Optical Gravitational Lensing Experiment 53 moon Enceladus 53 RX J# 53 dusty disks 53 Henize #-# 53 Vourlidas 53 gaseous planets 53 Kuchner 53 ROSAT 53 Kepler spacecraft 53 infrared telescope 53 crystalline silicates 53 Shri Kulkarni 53 Hanny Voorwerp 53 Johny Setiawan 53 Orbiter LRO 53 Peter Jenniskens 53 Stéphane Udry 53 asteroids comets 53 blazar 53 planet Gliese #c 53 shadowy craters 53 extrasolar worlds 53 permanently shadowed regions 53 Dikpati 53 Andromeda Galaxy 53 Nasa Kepler 53 ejecta 53 SIM PlanetQuest 53 comets 53 MARSIS radar 53 SOHO spacecraft 53 microlensing 53 telescopes astronomers 53 gaseous envelope 53 UA Lunar 53 quasars 53 William Borucki 53 hot Jupiters 53 Xavier Bonfils 53 Sagittarius dwarf galaxy 53 Von Frese 53 astrophysical 53 planetoids 53 gamma ray emission 53 Maciej Konacki 53 orbited Jupiter 53 gravitational waves 53 Joel Primack 53 Wettergreen 53 Milky Way Galaxy 53 Orion Nebula 53 dimming starlight 53 J# +# [002] 53 Beichman 53 Cygnus Lyra region 53 Jupiter moons 53 microbial ecosystems 53 infalling 53 NASA Far Ultraviolet 53 asteroid 53 Orionids 53 metallicity 53 G#.# +#.# 53 planetary missions 53 protoplanetary discs 53 spaceweather.com 53 Baross 53 NASA Chandra 53 distant galaxy clusters 53 Gregory Asner 53 radioactive nuclei 53 Planetary Transits 53 rocky extrasolar planet 53 Pegasi 53 Muchachos Observatory 53 Comet NEAT 53 proto planetary disk 53 Sibeck 53 undersea volcanoes 53 Voyager spacecraft 53 TrES 53 Lulin 53 Antennae Galaxies 53 Wolf Rayet stars 53 Christopher Chyba 53 gravitational lenses 53 meteoroid 53 galaxy formation 53 microquasar 53 Fran Bagenal 53 gravitationally 53 magnetic monopole 53 Ruvkun 53 Michael Studinger 53 Cassini imaging 53 ultraviolet wavelengths 53 Titan smoggy 53 Jay Melosh 53 moonlets 53 Cepheids 53 SN#A 52 orbiting gamma ray 52 planets circling stars 52 Korotev 52 neutrino physics 52 AGNs 52 Kuiper Belt object 52 earthshine 52 galactic cosmic rays 52 lunar meteorites 52 constellation Carina 52 Huchra 52 solar nebula 52 Cancri 52 particle astrophysics 52 Mewaldt 52 asteroids 52 Prof. Hawking 52 Carey Lisse 52 DISR 52 Kepler Space Telescope 52 protoplanetary 52 dynamical evolution 52 largest moon Charon 52 Udry 52 galaxy 52 magnetotail 52 cometary dust 52 AU Mic 52 WIMPs 52 Garth Illingworth 52 X ray observatories 52 orbiting telescope 52 astrophysical objects 52 Quaoar 52 faint galaxies 52 atmospheric neutrinos 52 Pluto Eris 52 CoRoT #b 52 Exoplanet 52 coronal heating 52 Planetary nebulae 52 moons orbiting Saturn 52 extraterrestrial civilizations 52 Super Kamiokande 52 Stefanie Komossa 52 Drake Deming 52 neutron stars 52 galaxy clusters 52 radial velocity method 52 Sagittarius B2 52 extrasolar planetary 52 MG J# +# 52 Dauphas 52 Avi Loeb 52 A'Hearn 52 Observatoire de Paris 52 celestial sphere 52 Astrophysics MOA 52 biosignatures 52 Frederic Pont 52 hydrated minerals 52 Vikhlinin 52 Ellen Stofan 52 comet orbit 52 SNfactory 52 Gravitational waves 52 innermost planet 52 astrophysics 52 Astrophysicists 52 RS Ophiuchi 52 Hakan Svedhem 52 Nenes 52 proplyds 52 Neptune Uranus 52 cometary material 52 intrinsic brightness 52 infalling gas 52 Nima Arkani Hamed 52 HIP #b 52 planet 52 starquakes 52 gravitational wave 52 PSR J# +# 52 Convection Rotation 52 transiting planet 52 supernova remnant Cassiopeia 52 Geza Gyuk 52 Explorer WISE 52 lightest exoplanet 52 Boethin 52 rotating neutron stars 52 moonlet 52 superheavy elements 52 Saturn moons 52 Kounaves 52 Southern Observatory ESO 52 Enceladus 52 brown dwarf 52 Des Marais 52 protons collide 52 cosmic collisions 52 exoplanets planets 52 Hipparcos 52 cosmic microwave radiation 52 Tau Ceti 52 moon Io 52 VISTA telescope 52 Telescope LSST 52 ESA Herschel 52 QQ# 52 Kulcinski 52 IBEX spacecraft 52 astrophysicists 52 neutrino detectors 52 Orion constellation 52 Richard Mushotzky 52 Astrophysicist 52 Stardust NExT 52 lensing galaxy 52 Thomas Zurbuchen 52 exoplanet hunter 52 globular cluster 52 interstellar dust 52 aurorae 52 planet magnetosphere 52 strangelets 52 Kanatzidis 52 cryovolcanism 52 Lick Observatory 52 lunar equator 52 afterglows 52 meteoritic material 52 tau neutrinos 52 Stephan Quintet 52 orbiting Chandra 52 HiRISE image 52 earthlike 52 geoneutrinos 52 martian meteorites 52 Rosette Nebula 52 Dimitar Sasselov 52 sterile neutrinos 52 spacecraft flyby 52 Saturnian moon Titan 52 lunar crater 52 supernova remnant 52 Paul Kneib 52 X ray spectrometer 52 Ontario Lacus 52 phyllosilicates 52 gravitationally bound 52 Dalcanton 52 Hubble Space Telescope HST 52 stargazer 52 gamma ray astronomy 52 Harlow Shapley 52 EPOXI mission 52 neutrino oscillation 52 muon neutrino 51 galaxy cluster 51 alien civilizations 51 Eridani 51 GALEX 51 Compton Gamma Ray 51 Type Ia supernovas 51 gravitational perturbations 51 astro comb 51 sodium atoms 51 exoplanets planets outside 51 assumed planets circling 51 Martian rocks 51 Triangulum Galaxy 51 SUSY 51 Chris Lintott 51 WMAP satellite 51 cosmologists 51 Hyakutake 51 asteroid Vesta 51 Neukum 51 Triangulum 51 GRB #B 51 APXS 51 Lars Hernquist 51 lunar perigee 51 William Bottke 51 Muons 51 Anisotropy Probe WMAP 51 galactic clusters 51 spinning neutron 51 Kip Thorne 51 elongated orbit 51 Mimivirus 51 eclipsing binaries 51 stellar occultation 51 CMB radiation 51 Milky Way 51 Jupiter icy moons 51 relativistic particles 51 dwarf spheroidal 51 Kawaler 51 Diviner instrument 51 Geminids 51 Kepler telescope 51 Nilton Renno 51 Aurigid 51 lunar regolith 51 matter antimatter asymmetry 51 planet Nibiru 51 Lagoon Nebula 51 baryonic matter 51 cosmological observations 51 moon Ganymede 51 Andromeda halo 51 Deep Impact comet 51 Ring Nebula 51 Storrie Lombardi 51 potassium atoms 51 Trapezium 51 nebulae 51 RY Sagittarii 51 lithium atoms 51 polar vortex 51 quantum tunneling 51 X ray pulses 51 Sedna 51 olivine mineral 51 proto cluster 51 hydrothermal vent 51 cometary 51 galactic magnetic 51 mineral olivine 51 YORP effect 51 Saturn moon 51 constellation Cetus 51 particle acceleration 51 Alexey Vikhlinin 51 Pleiades cluster 51 Oganessian 51 nucleosynthesis 51 orbiting Hubble Space Telescope 51 Higgs Boson particle 51 particle detector 51 Shackleton Crater 51 heliosphere 51 cluster NGC 51 nebular 51 reionization 51 Nir Barzilai 51 OGLE TR 51 volcanic moon Io 51 Cassini ultraviolet 51 Steward Observatory 51 interstellar particles 51 planetary embryos 51 Agol 51 Higgs boson particle 51 energetic cosmic rays 51 lunar soil 51 volcanic plumes 51 Johannes Kepler 51 Milankovitch cycles 51 Saturn aurora 51 emit X rays 51 Mini TES 51 Kraken Mare 51 SCP #F# 51 VB #b 51 detect neutrinos 51 Grenoble Observatory 51 Cat Paw Nebula 51 astronomer Clyde Tombaugh 51 LOFAR 51 Cosmologists 51 planets asteroids 51 Maria Zuber 51 Gamma ray bursts 51 PASADENA Calif. Astronomers 51 dustier stormier atmosphere 51 CERN LHC 51 Oort cloud 51 Ray Jayawardhana 51 soliton 51 Gravitational lensing 51 CoRoT 51 astronomical observatories 51 zodiac constellations 51 hydrogen isotopes 51 Martian surface 51 supermassive black holes 51 Michael A'Hearn 51 Bramley Murton 51 antineutrinos 51 asteroid impacts 51 protoplanetary disc 51 Rychard Bouwens 51 Reneke 51 Owen Gingerich 51 neutron spectrometer 51 astronomer Johannes Kepler 51 HiRISE camera aboard 51 Scheeres 51 Nasser Peyghambarian 51 ESA Rosetta 51 Opportunity rover 51 UKIRT 51 BepiColombo 51 Steven Cummer 51 Wolfgang Brandner 51 Nasa Jet Propulsion 51 Peter Grünberg 51 VIRTIS 51 meteorite impacts 51 Gravity Probe 51 spherical halo 51 Bonanos 51 Diviner 51 NEAs 51 hypervelocity star 51 graphite whiskers 51 thermonuclear reactions 51 tau neutrino 51 Ordovician extinction 51 Martian lander 51 ESA Planck 51 planet WASP #b 51 Astrophysical Institute 51 Saturn outermost ring 51 interstellar dust particles 51 Earth asteroids 51 IceCube 51 WISE telescope 51 NASA Jet Propulsion Lab 51 NASA Cosmic Background 51 AERONET 51 Comet Holmes 51 giant elliptical galaxy 51 George Djorgovski 51 fainter objects 51 Cabrol 51 Joe Veverka 50 orbiting 50 particle physics experiments 50 Gliese 50 Zolensky 50 Subrahmanyan Chandrasekhar 50 Jean Pierre Bibring 50 slender crescent 50 Lewis Dartnell 50 robotic explorer 50 ionized hydrogen 50 galactic halo 50 Sromovsky 50 diffuse aurora 50 Hale Bopp 50 TGFs 50 heliospheric 50 organic molecules 50 JIMO 50 Lyman alpha 50 Giovanni Fazio 50 spectroscopic analysis 50 David Wettergreen 50 constellation Pegasus 50 NCEAS 50 moons 50 SMBH 50 Papovich 50 Fermi LAT 50 astronomical observations 50 gamma ray bursts 50 Sombrero Galaxy 50 Mazzali 50 Pierre Drossart 50 Nasa Ames 50 JDEM 50 Large Magellanic Cloud 50 Manned missions 50 R#a# 50 Fornax cluster 50 waning gibbous 50 galaxies nebulae 50 Nial Tanvir 50 helium atoms 50 shadowed craters 50 neutralino 50 Titan Saturn