Related by context. All words. (Click for frequent words.) 71 habitable zones 70 rocky planets 66 Goldilocks zone 64 super Earths 63 habitable planets 62 HD #b [002] 62 brown dwarf 61 terrestrial planets 61 Gliese #g 61 brown dwarfs 60 exoplanets 60 Gliese 60 potentially habitable 60 planets orbiting 60 exoplanet 59 planets 58 gaseous planets 57 GJ #b [001] 57 potentially habitable planets 57 Kepler #b 57 CoRoT 7b 57 extrasolar planets 57 hot Jupiters 57 transiting planets 57 extrasolar planet 56 habitable worlds 56 WASP #b 56 Earthlike planets 56 Kuiper Belt 55 transiting planet 55 Gliese #c 55 Kuiper belt 55 protoplanetary disk 55 Goldilocks planet 55 Enceladus 55 star Gliese 54 planet orbiting 54 Gliese #d 54 habitable planet 54 planets orbiting distant 54 planet orbits 54 extrasolar planets orbiting 53 Oort Cloud 53 Earthlike planet 53 red supergiant 52 Beta Pictoris b 52 GJ#b 52 HD#b 52 star Proxima Centauri 52 planet HD #b 52 icy moons 52 globular cluster 52 Oort cloud 52 TrES 52 Corot 9b 52 planet Gliese #c 52 Cancri e 52 Corot 7b 52 tidally locked 52 planet Gliese #g 52 Kuiper Belt objects 51 planets orbiting stars 51 exoplanet orbiting 51 magnetar 51 Milky Way Galaxy 51 GJ #b [002] 51 planemos 51 photosphere 51 KBOs 51 Kuiper Belt object 51 globular clusters 51 extrasolar 51 Orion Nebula 51 exoplanets orbiting 51 planets orbiting sun 51 permanently shadowed craters 51 Earthlike 50 gaseous planet 50 CoRoT 50 gravitationally bound 50 Cancri 50 Epsilon Eridani 50 phyllosilicates 50 moon Europa 50 moons orbiting 50 stellar nurseries 50 Sedna 50 UB# [003] 50 giant gaseous planets 50 planets circling stars 50 starburst galaxies 50 smallest exoplanet 50 constellation Hercules 50 orbits 49 Omega Centauri 49 Milky Way galaxy 49 planetary nebulae 49 galaxy cluster 49 constellation Aquarius 49 AU Mic 49 subsurface ocean 49 GRBs 49 infrared wavelengths 49 sunlike stars 49 unaided eye 49 Fomalhaut b 49 VB #b 49 HL Tau 49 Earth asteroids 49 J# +# [002] 49 HAT P 49 Quaoar 49 Gliese #e 49 earthlike planets 49 Large Magellanic Cloud 49 constellation Libra 49 luminous galaxies 48 -# degrees Celsius [001] 48 permanently shadowed 48 Tarantula Nebula 48 Queloz 48 Hot Jupiters 48 Beta Pictoris 48 Upsilon Andromedae b 48 TrES 4 48 magnetars 48 star Fomalhaut 48 redshift 48 plutoids 48 moon Enceladus 48 planets circling 48 quasar 48 constellation Centaurus 48 Proxima Centauri 48 constellation Virgo 48 ultraviolet wavelengths 48 Super Earths 48 Betelgeuse 48 celestial object 48 supermassive 48 Upsilon Andromedae 48 habitability 48 Martian equator 48 merging galaxies 48 BLG #Lb 48 X ray wavelengths 47 red supergiants 47 SN #gy 47 chromosphere 47 S/# P2 47 sized planets orbiting 47 Eta Carinae 47 dwarf planets 47 Kepler 9c 47 ionized gas 47 Earths orbiting 47 lunar poles 47 Small Magellanic Cloud 47 AGNs 47 Jupiter icy moons 47 heliopause 47 PZ Tel 47 inhabitable planets 47 planets astronomers 47 asteroids 47 elliptical galaxies 47 Pluto Eris 47 exo planets 47 CoRoT #b 47 Higgs particle 47 quasars 47 plutoid 47 R Coronae Borealis 47 Lake Vostok 47 galaxies 47 solar nebula 47 CoRoT 9b 47 comets 47 metallicity 47 GRB #B 47 Cepheids 47 Meridiani Planum 47 BP Psc 47 Solar System 46 elliptical orbits 46 Milky Way 46 globular star 46 constellation Perseus 46 Kuiper belt objects 46 Bok globules 46 elliptical galaxy 46 magma ocean 46 gravitational microlensing 46 astronomical objects 46 dust enshrouded 46 Pluto Charon 46 neutron star 46 Venusian atmosphere 46 BLG #L 46 ULIRGs 46 -# degrees Fahrenheit [002] 46 X ray binary 46 carbonate minerals 46 mantle plumes 46 Meridiani 46 Andromeda galaxy 46 innermost planet 46 Andromeda Galaxy 46 Wolf Rayet stars 46 R#a# 46 Stephane Udry 46 starburst galaxy 46 AUs 46 WIMPs 46 hydrated minerals 46 organic molecules 46 supernovae 46 geologically active 46 SIRTF 46 extrasolar planetary systems 46 Saturn moons 46 cluster NGC 46 dirty snowballs 46 protostars 46 -# ° C [001] 46 Stephan Quintet 46 asteroid belt 46 solar corona 46 hydrothermal vents 46 Saturn moon 46 TW Hydrae 46 perihelion 46 nebulae 46 exoplanets planets 46 exosphere 45 nicknamed Xena 45 HD# [005] 45 exoplanetary systems 45 Syrtis Major 45 galaxy clusters 45 constellation Sagittarius 45 active galactic nuclei 45 supernova 45 COROT 45 Saturn moon Enceladus 45 equatorial regions 45 supermassive black hole 45 circumstellar disk 45 planets orbits 45 habitable 45 biosignatures 45 gamma ray burst 45 asteroids comets 45 observable universe 45 supermassive black holes 45 radial velocity method 45 Wolf Rayet star 45 luminosities 45 dwarf galaxy 45 Antennae Galaxies 45 GRB # 45 circumstellar disks 45 mu Arae 45 Crab Nebula 45 lunar craters 45 HD# [002] 45 eclipsing binary 45 Pegasi 45 Cabeus 45 dwarf galaxies 45 chondrites 45 comets asteroids 45 axions 45 Kelvin -# 45 eccentric orbits 45 moon Charon 45 COROT 7b 45 constellation Gemini 45 Jovian moon 45 Astronomical Units 45 eclipsing binaries 44 comets orbiting 44 Galilean satellites 44 plutons 44 Earths 44 silicate dust 44 GeV 44 asteroid Ceres 44 hematite mineral 44 carbonaceous chondrites 44 moonlet 44 protoplanetary disks 44 moonlets 44 aphelion 44 UDFy # 44 lunar crust 44 -# Celsius [001] 44 William Borucki 44 solar radii 44 gamma ray bursts 44 orbital resonance 44 accretion disk 44 Jovian moons 44 constellation Lyra 44 protostar 44 fainter objects 44 redshifts 44 planet transits 44 exoplanetary 44 Saturn magnetosphere 44 Saturnian system 44 icy crust 44 Charles Beichman 44 constellation Andromeda 44 radial velocity 44 Cabeus crater 44 prebiotic molecules 44 dwarf planet 44 IntergalaticEarth 44 Jupiter moon Io 44 SMM J# 44 planet WASP #b 44 Kuiper Belt Objects 44 distant galaxy 44 S/# S1 44 icy comets 44 constellation Cassiopeia 44 heliosheath 44 Doradus 44 RY Sagittarii 44 trans Neptunian objects 44 perigee 44 constellation Ursa Major 44 giant elliptical galaxies 44 distant galaxies 44 -# ° F [001] 44 Milky Way halo 44 #P/Churyumov-Gerasimenko 44 Ontario Lacus 44 planetary nebula 44 Bug Nebula 44 Valles Marineris 44 constellation Carina 44 exoplanets planets outside 44 Sasselov 44 Kepler 9b 44 constellation Leo 44 Phoebe orbits 44 Fomalhaut 43 planetoid 43 celestial equator 43 constellation Cetus 43 ionized hydrogen 43 constellation Scorpius 43 highly elliptical orbit 43 nebular 43 supernova remnant 43 Virgo cluster 43 supersymmetric particles 43 Mpc 43 permanently shadowed regions 43 Martian polar 43 planet TrES 43 NASA Kepler 43 sodium atoms 43 interstellar medium 43 baryons 43 Red Rectangle 43 retrograde orbit 43 star Beta Pictoris 43 Neutron stars 43 exosolar planets 43 neutron stars 43 quark gluon plasma 43 Nili Fossae 43 RQ# 43 interstellar cloud 43 CAIs 43 spiral galaxies 43 Lutetia 43 VY Canis Majoris 43 Lagoon Nebula 43 mesosphere 43 XO 3b 43 volcanically active 43 spectroscopic observations 43 smallest extrasolar planet 43 planetesimals 43 galaxy M# [002] 43 constellation Eridanus 43 galaxy 43 elongated orbits 43 Sagittarius B2 43 galaxy formation 43 neutralino 43 reionization 43 ALH# 43 OGLE TR #b 43 Type Ia supernova 43 supernova explosion 43 submillimeter wavelengths 43 Carina Nebula 43 Earth radii 43 Orion nebula 43 Gemini constellation 43 Epsilon Indi 43 Henize #-# 43 galactic halo 43 protoplanet 43 kpc 43 asteroid Vesta 43 constellation Taurus 43 lunar perigee 43 olivine 43 binary asteroid 43 GZK cutoff 43 equator 43 Zeta Ophiuchi 43 CoRoT satellite 43 Cassini ion 43 clathrates 43 Saturn outermost 43 masers 43 blue supergiant 43 Jupiter Saturn Uranus 43 missing baryons 43 Bruce Jakosky 43 giant elliptical galaxy 43 Wolszczan 43 deuterium 43 nebula 42 Spitzer Space Telescope 42 asteroidal 42 Carinae 42 silicates 42 HD #b [001] 42 inner asteroid belt 42 Kepler 42 supernova explosions 42 Antarctic Dry Valleys 42 Hematite Slope 42 X ray emitting 42 SN #A 42 Gliese #G 42 Kuiper Belt mysterious 42 spiral galaxy 42 baryonic matter 42 HII regions 42 Cepheid variable 42 galactic mergers 42 GQ Lupi 42 chondrules 42 celestial objects 42 Kuiper belt object 42 evolve Borucki 42 thermonuclear explosion 42 Sara Seager 42 filamentary structure 42 asteroid 42 X ray emission 42 ejecta 42 Globular clusters 42 mid latitudes 42 Astronomers 42 Mojzsis 42 cosmological distances 42 shadowy craters 42 hypervelocity stars 42 high redshift galaxies 42 intrinsic brightness 42 gray hematite 42 millisecond pulsars 42 superheavy elements 42 ° Fahrenheit 42 constellation Auriga 42 photometry 42 globulars 42 Higgs bosons 42 Fornax cluster 42 gravitational interaction 42 Eagle Nebula 42 outer corona 42 emission nebula 42 La Silla Chile 42 X ray binaries 42 strange quark 42 supergiants 42 nucleosynthesis 42 shorter wavelengths 42 astrobiologists 42 tholins 42 HM Cancri 42 moons 42 polar craters 42 Cepheid variables 42 electron neutrinos 42 hydrostatic equilibrium 42 hydroxyl 42 supergiant star 42 Toutatis 42 shadowed craters 42 BP Piscium 42 Microlensing 42 fist widths 41 planets comets 41 planetary transits 41 OGLE 41 galactic nuclei 41 moons Phobos 41 Alpha Centauri 41 fainter 41 Kuiper Belt Object 41 noctilucent clouds 41 subglacial lake 41 extremophiles 41 occultations 41 Martian arctic 41 outermost planet 41 tau neutrinos 41 gamma ray emitting 41 asthenosphere 41 equatorial bulge 41 jarosite 41 cryovolcanism 41 star Spica 41 heliosphere 41 visible wavelengths 41 MG J# +# 41 constellation Bootes 41 gravitational perturbations 41 Trapezium 41 PKS #-# 41 elongated orbit 41 constellation Orion 41 magnetosphere 41 Fermi telescope 41 comet 41 Shackleton crater 41 constellation Cygnus 41 planets Uranus 41 spiral nebulae 41 Mercury magnetosphere 41 heavily cratered 41 solar insolation 41 hydrogen helium 41 axion 41 pulsars 41 CMB radiation 41 astrobiology 41 foraminifera 41 Makemake 41 celestial sphere 41 dense clumps 41 Astrophysical Journal 41 Magnetars 41 KT boundary 41 NASA Kepler spacecraft 41 Serpens Cauda 41 sunlike star 41 magnetic reconnection 41 asteroids orbiting 41 IRC +# 41 moon Mimas 41 outer planets 41 supernova SN 41 infrared spectra 41 microlensing 41 auroral 41 Tarantula nebula 41 RRATs 41 baryon 41 Kepler spacecraft 41 circular orbits 41 nuclei 41 Type Ia supernovae 41 Konacki 41 baryonic 41 biosignature 41 retrograde orbits 41 spherules 41 TNOs 41 AB Aurigae 41 Arches Cluster 41 Mini TES 40 lensing galaxy 40 Epsilon Aurigae 40 permanently shadowed crater 40 moon Titan 40 Cosmic Microwave Background 40 submillimeter 40 polar caps 40 continental crust 40 comet nucleus 40 ionize 40 highly elliptical orbits 40 mineralogical composition 40 Pleiades cluster 40 abundances 40 planetary 40 silicate mantle 40 sedimentary deposits 40 Galilean moons 40 Gondolo 40 volcanic vents 40 largest moon Charon 40 Triangulum Galaxy 40 interstellar clouds 40 Saturn Enceladus 40 radioactive nuclei 40 orbital eccentricity 40 Olympus Mons 40 single celled 40 carbonaceous chondrite 40 magnetic monopoles 40 parsecs 40 circumstellar 40 constellation Aries 40 Trojan asteroids 40 protoplanetary discs 40 Shackleton Crater 40 astrobiological 40 submillimeter galaxies 40 faint galaxies 40 Vastitas Borealis 40 Mimas 40 neutral mass spectrometer 40 planethood 40 pyroxene 40 prograde 40 Gamma ray bursts 40 constellation Ophiuchus 40 hematite 40 Mars 40 silicon monoxide 40 distant quasar 40 proplyds 40 galaxy M# [001] 40 accretion disks 40 post perovskite 40 waxing crescent moon 40 carbonate globules 40 Chi Cygni 40 Pleiades star 40 constellation Pegasus 40 Rosette Nebula 40 Alfvén waves 40 planetary embryos 40 PSR J# 40 infrared spectral 40 constellation Ara 40 Capricornus 40 Alycia Weinberger 40 proto planetary disks 40 proto galaxies 40 smallest exoplanets 40 galaxy NGC 40 GRB 40 Hesperian epoch 40 polar regions 40 active volcanism 40 thin crescent moon 40 Lagrangian 40 SDSS II 40 spherical halo 40 Terrestrial Planet Finder 40 orbiting Gliese 40 Samuel Oschin Telescope 40 planets Kepler 40 nebula NGC 40 isotopic compositions 40 superfluid 40 jovian 40 intracluster 40 hydrothermal vent 40 cosmological models 40 moons Europa 40 brightest supernova 40 supernovas 40 Puppis 40 gravitational lenses 40 orbiting planets 40 boson 40 GALEX 40 magmatic 40 -# º C [002] 40 Squyres Cornell 40 gravitational lens 40 constellation Vulpecula 40 dustier stormier atmosphere 40 constellation Piscis Austrinus 40 neutralinos 40 Higgs boson 40 COROT exo 3b 40 hydrogen atoms 40 interacting galaxies 40 Delta Cephei 40 polar orbits 39 albedo reflectivity 39 optical telescopes 39 distant supernovae 39 arcseconds 39 gravitationally 39 Eridani 39 cosmological theories 39 perchlorates 39 kelvins 39 water hypothesizes Stephane 39 isotopic composition 39 William Borucki Kepler 39 Gusev crater 39 tidal bulge 39 blue straggler 39 planet 39 Pegasus constellation 39 Xavier Bonfils 39 meteoritic material 39 Saturnian moon 39 orbits Saturn 39 planets atmospheres 39 shiniest object 39 distant suns 39 Saturn Cassini 39 orbital radius 39 microbialites 39 Elliptical galaxies 39 Ophiuchi 39 planet Gliese 39 NGC# 39 Seyfert galaxies 39 interstellar dust particles 39 transiting exoplanets 39 antiparticle 39 lightest exoplanet 39 fermion 39 XTE J# 39 Comet Lulin 39 hydrosphere 39 relativistic particles 39 magnetotail 39 planets moons 39 Triangulum 39 HIRES spectrometer 39 gravitational interactions 39 Dry Valleys 39 Virgo Cluster 39 Churyumov Gerasimenko 39 HIP #b 39 supersymmetric 39 Mandushev 39 SN#A 39 neutrino mass 39 circular orbit 39 astronomers 39 Cygnus Lyra region 39 Orion constellation 39 Hellas Basin 39 zodiacal light 39 Higgs Boson 39 synchronous orbit 39 asterism 39 Coma Cluster 39 type Ia supernovae 39 God Particle 39 magnetospheric 39 Comet Holmes 39 neutrino 39 lunar equator 39 ecliptic 39 thermosphere 39 ecliptic plane 39 Cepheus 39 polar latitudes 39 Titan Saturn 39 smoothest flattest 39 Cat Paw Nebula 39 SNR #-#.# 39 organic compounds 39 ultracold atoms 39 infrared radiation 39 Monoceros 39 subduction zones 39 Veil Nebula 39 SCP #F# 39 infrared wavelength 39 atoms 39 # Apophis 39 Rydberg atom 39 CRISM 39 Hubble observations 39 Trifid Nebula 39 microbial ecosystems 39 Bose Einstein condensate 39 Orionids 39 elliptical orbit 39 celestial bodies 39 Helix nebula 39 Bose Einstein condensates 39 spectroscopically 39 midlatitudes 39 exo planet 39 occulted 39 Higgs boson particle 39 suns 39 Lunine 39 meteorites 39 galactic cosmic rays 39 extrasolar planetary 39 Mars northern latitudes 39 prebiotic chemistry 39 Venus Neptune Uranus 39 active galactic nucleus 39 Martian meteorites 39 sun corona 39 supersymmetry 39 gaseous envelope 39 -# degrees centigrade [001] 39 Saturn Uranus Neptune 39 galactic disk 39 planetary Transits 39 Martian surface 39 Asteroid Belt 39 presolar grains 39 martian 39 millisecond pulsar 39 periodic dimming 39 single celled algae 39 oxygen isotopes 39 photosynthetic organisms 39 meteoroids 39 driest deserts 39 De Pontieu 39 X ray telescopes 39 distant supernovas 39 comet #P/Churyumov-Gerasimenko 38 Jean Pierre Bibring 38 Quadrantids 38 Type 1a supernovae 38 Europa Ganymede 38 Helmi stream 38 radii 38 barred spiral galaxy 38 Jupiter Saturn 38 equatorial 38 transiting exoplanet 38 Peter Eisenhardt 38 Ulysses spacecraft 38 chemical abundances 38 cometary material 38 reflection nebula 38 lithium bearing brines 38 moon Mab 38 molten magma 38 homochirality 38 Diviner 38 hypervelocity star 38 Saturnian moon Titan 38 z ~ 38 chlorine monoxide 38 northern latitudes 38 Dumbbell Nebula 38 G#.# +#.# 38 earths 38 superconduct 38 aurorae 38 wavelength infrared 38 Trifid 38 Deep Impact eXtended Investigation 38 Magellanic Clouds 38 Alfven waves 38 Mamajek 38 HARPS spectrograph attached 38 distant quasars 38 redshifted 38 astrometry 38 Tau Ceti 38 Isidis Planitia 38 stellar occultation 38 EPOXI 38 Little Dipper 38 NASA twin rovers 38 interstellar space 38 IAU definition 38 supercluster 38 Perseus Cluster 38 Gerard Kuiper 38 asteroseismology 38 Milankovitch cycles 38 Camelopardalis 38 planets orbiting suns 38 Comet NEAT 38 Type Ia 38 detect gravitational waves 38 arcminutes 38 tungsten isotopes 38 atmospheres 38 supernovae explode 38 primordial ingredients 38 single celled microorganisms 38 planet HD#b 38 zodiacal dust 38 SiO 38 polar vortex 38 radial velocities 38 mineral hematite 38 hydroxyl molecules 38 pre biotic 38 binary asteroids 38 optical wavelengths 38 Neptune Uranus 38 planetesimal 38 tropopause 38 PSR B# +# 38 interstellar dust grains 38 XMM Newton 38 substorms 38 isotope ratios 38 Martian crust 38 Terra Meridiani 38 Ring Nebula 38 cosmic ray flux 38 oxygen isotope 38 sulfate salts 38 Endeavour Crater 38 maser emission 38 theoretical particle 38 planetary astronomy 38 radial velocity technique 38 Kounaves 38 YORP effect 38 southern constellation Carina 38 Mauna Kea Hawaii 38 Noctilucent clouds 38 Hawking radiation 38 nebulosity 38 Wilkinson Microwave Probe 38 sunspot 38 waxing gibbous moon 38 subatomic particle 38 cosmic cannibal 38 supergiant stars 38 lowermost mantle 38 IRAS 4B 38 Plutoids 38 electron pairs 38 primitive meteorites 38 Orionid 38 Quadrantid meteor shower 38 Martian microbes 38 novae 38 gravitational tugs 38 interglacial period 38 Uranus 38 pulsar 38 Iapetus 38 ellipse 38 Earth objects NEOs 38 dipole moment 38 weakly interacting 38 SMBH 38 Saturn Jupiter Uranus 38 subtropical oceans 38 2 MeV electron 38 planetary scientist 38 galactic bulge 38 thermocline 38 planetary nebulas 38 Small Body Nomenclature 38 Exoplanets 38 Comet Tempel Tuttle 38 constellation Aquila 38 constellation Canis Major 38 cosmological constant 38 P/# A2 38 Jonathan Lunine 38 gravitational waves 38 subglacial lakes 38 asteroids Vesta 38 Udry 38 magnetospheres 38 corona 38 Exoplanet 38 Hale Bopp 38 Muchachos Observatory 38 microlensing events 38 calderas 38 constellation Cepheus 37 supernova remnants 37 OGLE TR 37 KH #D 37 Manned missions 37 Geminga 37 astrophysical 37 spatially resolved 37 astrophysical objects 37 Endurance crater 37 frigid arctic plains 37 Comet #P/Churyumov-Gerasimenko 37 Planck satellite 37 stromatolites