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(Click for frequent words.) 64 asteroids 63 Earth asteroids 62 Earth objects NEOs 61 NEAs 58 asteroid 55 Kuiper belt objects 55 RQ# 55 TNOs 54 Kuiper Belt objects 54 Spaceguard 54 KBOs 53 impactors 53 Pluto Charon 52 microlensing events 52 Apophis 52 astronomical objects 52 MN4 52 sunlike stars 52 YU# 51 Solar Orbiter 51 super Earths 51 exoplanets 51 asteroid impacts 51 extrasolar planets 50 Spaceguard Survey 50 GRBs 50 Kuiper Belt Objects 50 transiting planets 50 habitable planets 50 asteroids comets 50 comets 49 extragalactic 49 transiting exoplanets 49 Pluto Eris 49 meteoroids 49 trans Neptunian objects 49 comet nucleus 49 extrasolar planetary systems 49 GRB #B 49 Epsilon Eridani 49 XMM Newton 49 exo planets 49 Apophis asteroid 49 QQ# 49 moonlets 49 smallest exoplanet 48 magnetars 48 Pan STARRS 48 Torino Scale 48 Asteroid 48 AGNs 48 Earthlike planet 48 GJ#b 48 planets 48 meteoroid 48 JDEM 48 fainter objects 48 cosmic phenomena 48 Kuiper Belt object 48 GALEX 48 Kuiper belt 48 Microlensing 48 satellites orbiting Earth 47 SDSS II 47 planets orbiting 47 planets asteroids 47 astrometry 47 comet 47 JWST 47 NASA Kepler 47 planetary nebulae 47 plutoids 47 inhabitable planets 47 Saturnian moons 47 Churyumov Gerasimenko 47 interstellar dust particles 47 Earth Object 47 HiRISE image 47 WD5 47 eclipsing binaries 47 Lutetia 46 unmanned probes 46 highly elliptical orbits 46 Fermi telescope 46 gamma ray burst 46 scarps 46 moonquakes 46 terrestrial planets 46 COROT 46 planets orbiting stars 46 celestial object 46 Deep Impact comet 46 P/# A2 46 asteroid Steins 46 Kuiper Belt Object 46 planets orbiting sun 46 supersymmetric particles 46 galactic clusters 46 OSIRIS REx 46 comets asteroids 46 Earthlike planets 46 CoRoT 46 Comet #P/Churyumov-Gerasimenko 46 planemos 46 retrograde orbits 46 Quaoar 46 astrophysical objects 46 potentially habitable planets 46 Galilean satellites 46 hematite mineral 46 Jovian moons 46 BepiColombo 46 rocky planets 46 carbonaceous chondrites 46 exosolar planets 46 brown dwarfs 45 Kuiper belt object 45 luminous galaxies 45 cosmological distances 45 Comet Hale Bopp 45 micrometeoroids 45 comet #P/Churyumov-Gerasimenko 45 starburst galaxies 45 NEO 45 distant supernovae 45 interstellar molecules 45 planetoids 45 exoplanetary 45 occultations 45 airbursts 45 APXS 45 Shoemaker Levy 45 infrared telescopes 45 Earth Asteroid 45 NEOWISE 45 Space ENvironment GEochemistry 45 phyllosilicates 45 gravitational lenses 45 solar radii 45 Earth orbiting satellites 45 filamentary structure 45 electromagnetic anomalies 45 alien civilizations 45 asteroid Itokawa 45 transiting planet 45 elongated orbits 45 EPOCh 45 robotic spacecraft 45 astrometric 45 icy moons 45 plutoid 45 #P/Churyumov-Gerasimenko 45 Lunar Prospector 45 ExoMars 45 jovian 45 dimming starlight 45 trans Neptunian 44 extraterrestrial civilizations 44 Terrestrial Planet Finder 44 NASAs 44 Super Earths 44 globular clusters 44 Itokawa 44 dwarf planets 44 asteroids orbiting 44 exoplanets orbiting 44 Mini SAR 44 moonlet 44 Comet Churyumov Gerasimenko 44 Kuiper Belt 44 Sojourner rover 44 satellites orbiting 44 biosignatures 44 Cosmic rays 44 galactic cosmic rays 44 gamma ray observatory 44 Comet Boethin 44 Spacewatch 44 TW Hydrae 44 habitable worlds 44 Comet Halley 44 astrophysical phenomena 44 orbital inclination 44 Great Observatories 44 Mars landers 44 Solar TErrestrial RElations Observatory 44 Solar System 44 gravitational keyhole 44 millisecond pulsars 44 NEOSSat 44 hydrostatic equilibrium 44 # Apophis 44 Borealis basin 44 planetary missions 44 Saturn Cassini 44 extrasolar planets orbiting 44 moon Charon 44 laser altimeter 44 gravitational waves 44 Apollo missions 44 interstellar dust grains 44 NASA Kepler spacecraft 44 extrasolar 44 planets circling 44 Triangulum Galaxy 44 SIM PlanetQuest 44 intrinsic brightness 44 Oort Cloud 44 GJ #b [001] 44 moon Europa 43 Kepler spacecraft 43 Cancri e 43 astrobiology 43 planets orbiting distant 43 PSR J# 43 Kepler Mission 43 Pluto 43 giant elliptical galaxy 43 Gliese #c 43 HiRISE images 43 cosmic ray particles 43 elliptical orbits 43 periodic dimming 43 Toutatis 43 protoplanet 43 Stardust spacecraft 43 Epoxi 43 thermal emission spectrometer 43 ULIRGs 43 Martian rovers 43 NuSTAR 43 Enceladus 43 J# +# [002] 43 galaxy clusters 43 Kepler #b 43 Earth asteroids NEAs 43 AUs 43 galaxy M# [002] 43 exoplanet 43 S/# S1 43 extrasolar planet 43 high redshift galaxies 43 quasars 43 Virgo Cluster 43 optical telescopes 43 Exoplanet 43 Andromeda Galaxy 43 orbits 43 exosphere 43 Martian rocks 43 SMEX 43 Fermi Gamma ray 43 meteorites 43 novae 43 Andromeda galaxy 43 celestial objects 43 exoplanetary systems 43 RHESSI 43 exobiology 43 Carina constellation 43 orbiting 43 radial velocity 43 Exoplanets 43 closest flyby 43 martian atmosphere 43 Jovian moon 43 Higgs particle 43 Voyager spacecraft 43 cosmic collisions 43 Hipparcos 43 dwarf galaxies 43 Shackleton crater 43 infrared wavelengths 43 Orionid 43 Martian meteorites 43 celestial bodies 43 microquasar 43 spectroscopic observations 43 Henize #-# 43 Cosmic Evolution 43 Earth radii 43 Milky Way Galaxy 43 globular cluster 43 colliding asteroids 43 distant galaxy clusters 42 astrobiological 42 cometary impacts 42 Trojan asteroids 42 distant galaxy 42 Comet Hartley 2 42 geosynchronous satellites 42 Comet Tempel 1 42 CoRoT satellite 42 distant quasars 42 Type Ia supernovas 42 VIRTIS 42 Higgs bosons 42 Jupiter magnetosphere 42 planet Gliese #g 42 planets astronomers 42 Gamma ray burst 42 binary asteroids 42 exoplanets planets 42 X ray observatory 42 cosmic ray collisions 42 cosmic particles 42 gamma ray bursts 42 moons Phobos 42 Astrophysical 42 cometary material 42 Gamma ray 42 gaseous planets 42 solar corona 42 Galilean moons 42 gravitational microlensing 42 NASA Kepler telescope 42 TGFs 42 binary asteroid 42 permanently shadowed craters 42 NASA rovers 42 microlensing 42 solar flares 42 arcseconds 42 Cassini Huygens 42 Extrasolar Planets 42 HD#b 42 airglow 42 carbonaceous chondrite 42 Oort cloud 42 CoRoT 7b 42 Shackleton Crater 42 X ray telescopes 42 Voyager probes 42 type Ia supernovae 42 gamma ray flares 42 UB# [003] 42 Tunguska asteroid 42 OGLE TR #b 42 X ray binary 42 decadal survey 42 cosmic rays 42 cosmic radiation 42 planetary 42 Viking Lander 42 Mpc 42 outermost planets 42 Beta Pictoris b 42 Orbiting 42 infrared observatory 42 asteroid Vesta 42 cometary 42 Omega Centauri 42 orbital debris 42 polarimetry 42 WFPC2 42 Venus transits 42 arcminutes 42 Boethin 42 Saturn outermost moon 42 Matoush structure 42 distant supernovas 42 stellar occultations 42 Nasa Kepler 42 supervolcanoes 42 sized planets orbiting 42 TrES 42 proplyds 42 noctilucent clouds 42 robotic probes 42 exo planet 42 WIMPs 42 Mars moon Phobos 42 WFC3 42 Cassini 42 geoneutrinos 42 Wolszczan 42 BLG #Lb 42 martian meteorites 42 planetary embryos 42 Planck satellite 42 carbonate minerals 42 Corot 9b 42 meteoritic material 42 G#.# +#.# 42 Io Europa 42 extrasolar planetary 42 magnetosphere 42 orbiting telescopes 42 Explorer WISE 42 largest moon Charon 41 Antennae Galaxies 41 earthlike planets 41 S/# P2 41 Manned missions 41 basaltic rocks 41 Ulysses spacecraft 41 hypervelocity 41 Helix Nebula 41 LCROSS Observation Campaign 41 Nasa spacecraft 41 outer planets 41 comet particles 41 SMBHs 41 lunar poles 41 Asteroid Itokawa 41 spaceborne 41 LINEAR 41 retrograde orbit 41 blazar 41 Enceladus flybys 41 orbiting gamma ray 41 Cassini flyby 41 dynamical evolution 41 Hubble Space Telescope HST 41 Kepler Telescope 41 Earth orbit 41 Swift Tuttle 41 ejecta 41 SN #gy 41 navigate autonomously 41 astrophysical 41 planetary science 41 planet Gliese #c 41 RRATs 41 icy comets 41 distant quasar 41 manned lunar 41 constellation Centaurus 41 geosynchronous 41 HARPS spectrograph attached 41 LADEE 41 TrES 4 41 orbital velocity 41 YORP effect 41 Fermi Telescope 41 heavily cratered 41 ALH# 41 gravitational wobbles 41 flyby spacecraft 41 permanently shadowed 41 redshift 41 geostationary orbits 41 noctilucent 41 comet nuclei 41 Hale Bopp 41 Cepheids 41 SPICAM 41 ACS WFC 41 TU# [002] 41 planet TrES 41 comet Wild 41 gaseous planet 41 penetrating geophysical 41 astronomers 41 Gliese #g 41 Saturn rings 41 energetic cosmic rays 41 elliptical galaxy 41 Milky Way halo 41 gravitational wave 41 ecliptic plane 41 Fornax cluster 41 galaxy M# [001] 41 conductive zones 41 Optical Gravitational Lensing Experiment 41 cosmic strings 41 Area Telescope LAT 41 planetary surfaces 41 merging galaxies 41 faint galaxies 41 lunar orbits 41 Cepheid variables 41 NASA Wilkinson Microwave 41 star Gliese 41 AU Mic 41 planetary transits 41 orbiting spacecraft 41 Terrestrial Planet Finder TPF 41 Hubble observations 41 redshifts 41 blazars 41 NASA Voyager spacecraft 41 optical wavelengths 41 prebiotic molecules 41 Convection Rotation 41 COROT exo 3b 41 JIMO 41 Observatory telescope 41 orbiting observatories 41 Laser Interferometer Gravitational Wave 41 hypervelocity stars 41 Cygnus Lyra region 41 chondritic meteorites 41 OGLE 41 NASA Cassini 41 NASA EPOXI mission 41 comets orbiting 41 planetoid 40 Saturn magnetosphere 40 airborne EM 40 X ray emission 40 supergiant star 40 magnetar 40 mesosphere 40 submillimeter galaxies 40 mineralogical composition 40 Comet Encke 40 ESA XMM Newton 40 LCROSS spacecraft 40 moons orbiting 40 neutron spectrometer 40 spacecraft 40 interstellar grains 40 mu Arae 40 planetary atmospheres 40 asteroid Lutetia 40 comet McNaught 40 WASP #b 40 planets orbits 40 Comet Hartley 40 comets meteors 40 microplastics 40 ExoMars rover 40 pallasite 40 astrobiologists 40 Earth magnetosphere 40 Rosetta spacecraft 40 habitable zones 40 retroreflector 40 lunar craters 40 outermost planet 40 inner asteroid belt 40 ExoMars mission 40 gradiometer 40 lunar equator 40 comet Churyumov Gerasimenko 40 Europa Orbiter 40 AAVSO 40 Lunar Reconnaissance Orbiter LRO 40 chondrites 40 Space Interferometry Mission 40 distant galaxies 40 circular orbits 40 Earthlike 40 left handed isovaline 40 alien beings 40 antihelium 40 LISA Pathfinder 40 Extraterrestrial Intelligence 40 CMEs 40 Deep Impact craft 40 EarthCARE 40 MESSENGER MErcury Surface 40 satellites 40 interstellar distances 40 Galileo spacecraft 40 Kepler 9c 40 GOSAT 40 ULP cepheids 40 Hubble Constant 40 orbiting Hubble Space Telescope 40 Flyby spacecraft 40 Gamma ray bursts 40 brown dwarf 40 Higgs boson particle 40 HIRES spectrometer 40 Orbiter LRO 40 Beta Pictoris 40 Samuel Oschin Telescope 40 Sedna 40 NASA Stratospheric Observatory 40 infrared radiation 40 MAVEN 40 planethood 40 ARGUS IS 40 neutralinos 40 gamma ray emission 40 lunar crust 40 Hubble Telescope 40 Alfven waves 40 Mars Pathfinder 40 spiral nebulae 40 gravitationally bound 40 LCROSS 40 X ray observatories 40 polarimetric 40 stellar occultation 40 infrared astronomy 40 lobate scarps 40 VTEM surveys 40 DIXI 40 orbits Saturn 40 baryons 40 Mars Phobos 40 ultraviolet wavelengths 40 Wide Angle Search 40 highly elliptical orbit 40 Gerard Kuiper 40 Saturn moon 40 carbon cenospheres 40 EPOXI 40 Halley Comet 40 GA6 40 Baptistina 40 planet Uranus 40 perihelion 40 polar orbiting satellites 40 journal Meteoritics 40 Coma Cluster 40 moon Io 40 potentially habitable 40 asteroidal 40 Foing 40 exoplanet hunter 40 rock outcrop 40 infrared spectra 40 Hubble orbits 40 Orbital Debris 40 Methone 40 celestial sphere 40 LEO satellites 40 Perseus Cluster 40 Gliese #d 40 habitable planet 40 Ring Nebula 40 Tunguska 40 radio occultation 40 detect gravitational waves 40 gravitational interactions 40 Asteroid Belt 40 Eta Carinae 40 geophysical conductors 40 Herschel telescope 39 aimpoint 39 Planets 39 Martian craters 39 Cosmic Vision 39 X ray wavelengths 39 dwarf spheroidal galaxies 39 Cassini Equinox 39 VD# [001] 39 SMOS mission 39 diffuse aurora 39 HUDF 39 supernova remnants 39 telescopic observations 39 Mimas 39 Descent Imager Spectral Radiometer 39 Meteorites 39 Anisotropy Probe WMAP 39 exoplanets planets outside 39 Bruce Jakosky 39 ejecta blanket 39 ETs 39 supermassive 39 LaRC 39 Extraterrestrial Life 39 aperture telescope 39 volcanic plumes 39 Rosetta orbiter 39 Gravitational waves 39 submillimetre wavelengths 39 proto planetary disk 39 active galactic nucleus 39 Galaxy Evolution 39 Chodas 39 optical interferometry 39 GeV 39 planetary Transits 39 protoplanetary disks 39 Cosmic Background Explorer COBE 39 Olympus Mons 39 neutrino detectors 39 Upsilon Andromedae b 39 S/# [001] 39 WISE spacecraft 39 HD# [002] 39 Mercury magnetosphere 39 animal phyla 39 galactic cosmic ray 39 planetesimals 39 Astrological lore 39 regolith 39 asteroid Apophis 39 z ~ 39 dwarf planet 39 eccentric orbits 39 Cosmic Microwave Background 39 Orion Nebula 39 Grillmair 39 MG J# +# 39 Horizontal Loop Electromagnetic 39 Total Ozone Mapping 39 Bonneville Crater 39 gravitational perturbations 39 CAIs 39 Isidis Planitia 39 Hyakutake 39 SPIRE instrument 39 geochemists 39 galaxy cluster 39 ESA SMART 39 planet orbiting 39 red supergiants 39 moon Mimas 39 spectroscopic measurements 39 CoRoT 9b 39 Interior Laboratory GRAIL 39 Type Ia supernova 39 aboard ESA Envisat 39 ESA Integral 39 gravitational lens 39 radial velocity method 39 Corot 7b 39 SN #D 39 SIRTF 39 pulsars 39 OGLE TR 39 THEMIS 39 manned lunar missions 39 Ozone Hole 39 active galactic nuclei 39 planetary orbits 39 moons JAXA 39 Nili Fossae 39 Avishay Gal Yam 39 Evolution Explorer 39 coronagraph 39 supergiant stars 39 circumstellar 39 Earth ionosphere 39 Union IAU 39 baryon 39 faraway galaxies 39 Kepler 39 interstellar boundary 39 Milky Way galaxy 39 lunar surface 39 Halley comet 39 UAVs 39 meteor impacts 39 EPOXI mission 39 spiral galaxies 39 coronal mass ejections 39 millisecond pulsar 39 Kepler 9b 39 Grammier 39 Space Telescope 39 Bernhard Fleck 39 Cabeus 39 lunar crater 39 orbiting satellites 39 Dwarf Planet 39 anomalous zones 39 Shepherding Spacecraft 39 Binzel 39 dust devils 39 MESSENGER 39 Jupiter Ganymede 39 Lunokhod 39 Delta Cephei 39 polar orbit 39 Antenna LISA 39 Aram Chaos 39 luminosities 39 Active Galactic Nuclei 39 Comet Elenin 39 comet Tempel 1 39 Gusev crater 39 protostars 39 permanently shadowed crater 39 Triangulum 38 IAU 38 Saturnian 38 untested geophysical 38 HD #b [002] 38 Huygens mission 38 IRAS #-# 38 Earth Asteroid Rendezvous 38 MErcury Surface Space ENvironment 38 Reiner Gamma 38 objects 38 comet Shoemaker Levy 38 New Horizons spacecraft 38 Epsilon Aurigae 38 Cometary 38 Type Ia supernovae 38 cosmic microwave radiation 38 igneous rocks 38 bolometers 38 orbital eccentricity 38 Comet Machholz 38 origins spectrograph 38 gamma ray telescope 38 Fomalhaut b 38 Saturn moons 38 Astrophysics MOA 38 Venusian surface 38 chargeability anomalies 38 THEMIS satellites 38 X ray binaries 38 observable universe 38 magnetic monopoles 38 magnetospheric 38 axial tilt 38 hydrated minerals 38 Mars CRISM 38 Comet Lulin 38 lunar meteorites 38 ESA Rosetta 38 radial velocities 38 planetesimal 38 polar regions 38 Elenin 38 2MASS 38 eclipsing binary 38 neutralino 38 lunar orbiters 38 shadowy craters 38 distant suns 38 spherules 38 asteroid orbit 38 spacecraft orbiting 38 nebular 38 Saturnian moon 38 spacecrafts 38 Mars Odyssey 38 conductive anomalies 38 ROSAT 38 Palaeocene Eocene Thermal Maximum 38 inner Oort Cloud 38 airborne anomalies 38 Quadrantids 38 electromagnetic flux 38 antineutrinos 38 HARPS instrument 38 smallest extrasolar planet 38 KamLAND 38 icy moon Enceladus 38 galactic nuclei 38 metallicity 38 martian 38 cosmic cannibal 38 asteroid Ceres 38 Arabia Terra 38 open pitable 38 interstellar dust 38 moons 38 Mars 38 carbonaceous meteorites 38 Asteroids 38 galaxies 38 galactic 38 galaxy NGC 38 Ranging MESSENGER spacecraft 38 Comet Tempel Tuttle 38 demoting Pluto 38 Victoria Crater 38 NICMOS 38 impactor spacecraft 38 Gliese #e 38 Tempel 1 38 comet Boethin 38 Potentially Hazardous Asteroid 38 Proxima Centauri 38 equatorial orbit 38 orbiting Mars 38 Climate Experiment GRACE 38 Chicxulub 38 proto cluster 38 mantle plumes 38 Tunguska Event 38 Jupiter icy moons 38 martian surface 38 Stratospheric Observatory 38 CMB radiation 38 orbital resonance 38 twin Voyager spacecraft 38 particle physicists 38 substorms 38 Fomalhaut 38 hot Jupiters 38 Mini TES 38 ultraviolet spectrograph 38 gravitational slingshot 38 galactic disk 38 Dwarf galaxies 38 planet magnetosphere 38 moon Enceladus 38 nucleosynthesis 38 SN #A 38 planets circling stars 38 cosmologists 38 supernovae explode 38 interstellar particles 38 planetary geologists 38 Alycia Weinberger 38 Heliophysics 38 GRB # 38 Heliospheric Observatory SOHO 38 Keck Telescopes 38 globulars 38 Spacecraft 38 Komossa 38 galaxy 38 SCIAMACHY 38 elemental composition 38 ESO telescopes 38 Infrared Astronomy 38 Laser Interferometer Space 38 Tunguska Siberia 38 star Proxima Centauri 38 Europa Ganymede 38 spherically symmetric 38 Earths 38 Dumbbell Nebula 38 NASA THEMIS 38 Hipparchus 38 Compact Reconnaissance Imaging Spectrometer 38 planet HD#b 38 reionization 38 coronal mass ejections CMEs 38 Murchison meteorite 38 flyby 38 Proba 2 38 type Ia supernova 38 accreting 38 spatially resolved 38 meteor showers 38 Martian surface 38 protoplanets 38 SDSS 38 GRB #A 38 geophysical targets 38 detect gamma rays 37 Lake Cheko 37 ringed planet 37 Noctilucent clouds 37 planets Kepler 37 Hot Jupiters 37 Cabeus crater 37 spectral fingerprints 37 ESA Huygens 37 flood basalts 37 spacecraft flyby 37 NASA Spacecraft 37 albedo reflectivity 37 IBEX spacecraft 37 AB Aurigae 37 LHC experiments 37 Timothy Spahr 37 called lobate scarps 37 Martian dust 37 Jenniskens 37 Svedhem 37 airborne geophysical anomalies 37 Encke gap 37 interstellar dust samples 37 micro meteorites 37 sedimentary deposits 37 six wheeled rover 37 EM conductors 37 crewed spacecraft 37 Fermi LAT 37 innermost planet 37 amateur astronomers 37 neutrino particles 37 NASA rovers Spirit 37 extraterrestrial civilization 37 Galactic cosmic rays 37 supersymmetric 37 supernovae 37 Phobos 37 Saturnian system 37 Submillimeter Array 37 ESA Planck 37 dwarf galaxy 37 NASA Cosmic Background 37 ESO VLT 37 Herschel Space Telescope 37 missing baryons 37 Extrasolar 37 PSR J# +# 37 Blackswift 37 Emily Lakdawalla 37 Yarkovsky effect 37 particle detectors 37 sterile neutrinos 37 Herschel Space 37 chondrules 37 hydroxyl molecules 37 Drake Equation 37 meteor craters 37 Higgs boson 37 cinder cones 37 Earth 37 XTE J# 37 UKIRT 37 NASA