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(Click for frequent words.) 69 extraterrestrials 66 extra terrestrials 64 alien 61 Martian 60 outer space 59 extraterrestrial civilizations 58 extraterrestrial beings 58 alien beings 57 aliens 57 Extraterrestrial 56 interplanetary 56 extraterrestrial civilization 56 alien civilizations 55 ETs 55 extraterrestial 55 UFOs 55 habitable worlds 55 asteroid 55 astrobiological 55 Red Planet 54 intergalactic 54 alien spacecraft 54 Extraterrestrials 54 interstellar 54 astrobiologists 53 UFO phenomena 53 alien spaceships 53 extrasolar 52 UFO 52 Gliese #c 52 Mars 52 exo planet 52 martian 52 cometary 52 habitable planets 51 Klaatu Keanu Reeves 51 flying saucers 51 Martians 51 otherworldly beings 51 comets asteroids 51 contactees 51 humanoid aliens 51 intelligent beings 51 asteroids comets 51 earthlings 51 planetary 51 galactic 51 earthling 51 Hale Bopp comet 51 comets meteors 51 cosmic 50 UFO buffs 50 exoplanetary 50 inter galactic 50 Seth Shostak 50 Nibiru 50 icy comets 50 alien mothership 50 planet Gliese #g 50 interdimensional 50 Martian soil 50 Earthlike planet 49 Higgs boson particle 49 extra terrestial 49 SETI Search 49 Gliese #d 49 extraterrestrial origin 49 comet 49 colonize Mars 49 astrobiology 49 alien abduction 49 outerspace 49 sterile neutrino 49 exobiology 49 paranormal phenomena 49 robot rovers 49 panspermia 49 Jovian moon 49 extraterrestrial UFO 49 Corot 7b 49 extraterrestrial aliens 49 inhabitable planets 49 Martian surface 49 Terrians 48 UFOS 48 sentient robots 48 Astrobiologists 48 Project Ozma 48 Earthlings 48 humanoid alien 48 planemos 48 Exopolitics 48 moon Europa 48 Venusians 48 NASA Kepler 48 extraterrestrial visitation 48 martians 48 Earthlike planets 48 contactee 48 lunar craters 48 planets 48 Saturn moon 48 Earthly 48 Higgs Boson particle 48 ufologists 48 Jupiter icy moons 48 Martians invading 47 supernatural 47 Gamma ray burst 47 biosignatures 47 Extraterrestrial Intelligence Institute 47 cosmos 47 planets orbiting distant 47 cryptozoologists 47 Cometary 47 comets 47 alien invasion 47 Saturn Enceladus 47 Drake Equation 47 inter planetary 47 alien artifact 47 asteroidal 47 faraway planets 47 asteroids 47 UFO enthusiasts 47 psychic phenomena 47 comet Wild 47 reptilian aliens 47 chemically reactive salt 47 Extra Terrestrial Intelligence 46 earthlike planets 46 moon Enceladus 46 planetoid 46 carbonaceous chondrite 46 reptilians 46 Mars rovers 46 Fermi Paradox 46 planet Uranus 46 Gliese #g 46 cosmic phenomena 46 habitable planet 46 alien lifeforms 46 Mars lander 46 Kepler Space Telescope 46 permanently shadowed craters 46 flying saucer 46 meteor impacts 46 supernatural phenomena 46 Reptilians 46 celestial bodies 46 UFOlogists 46 Kuiper Belt object 46 Epoxi 46 robotic spacecraft 46 Kuiper Belt Objects 46 Jill Tarter 46 robot Gort 46 Gusev crater 46 rocky planets 46 alien abductions 46 manned lunar 46 crewed spacecraft 46 homeworld 46 comet hurtling 46 Victor Von Doom 46 NASA Lunar Prospector 46 Viking landers 46 shadow biosphere 46 Venusian 46 Vakoch 46 sentient 45 planet 45 celestial 45 meteorite 45 Oort Cloud 45 extraterrestrial alien 45 terraforming Mars 45 Alien 45 Martian terrain 45 Astrobiology Magazine 45 alien lifeform 45 earthlike 45 Kepler spacecraft 45 gray hematite 45 heroine Samus Aran 45 cattle mutilations 45 cometary dust 45 supernatural beings 45 Deep Impact comet 45 supersymmetric particles 45 Thetans 45 astral 45 UFOlogy 45 observable phenomena 45 neutralinos 45 extraterrestrial origins 45 Extraterrestrial Intelligence 45 subsurface ocean 45 Cassini Huygens 45 extradimensional 45 Kuiper belt object 45 jovian 45 antimatter 45 meteor 45 lunar 45 Gliese #G 45 extraterrestrial UFOs 45 Oort cloud 45 interstellar distances 45 planet Krypton 45 NASA Kepler spacecraft 45 Manned missions 45 cryptozoological 45 terrestrial beings 45 exosphere 45 abiogenesis 45 Nasa spacecraft 45 Antarctic Dry Valleys 45 Martian landscape 45 Martian rovers 45 Bruce Jakosky 45 evaporite deposits 45 distant supernovae 45 Moonbase Alpha 45 alien spaceship 45 neutrino particles 45 robotic explorer 45 orbiting spacecraft 44 unexplained phenomena 44 spacefaring 44 EPOXI mission 44 RQ# 44 Andorian 44 chemtrails 44 asteroid collisions 44 protoplanet 44 meteorites 44 planetary geologists 44 Skrull 44 Exoplanet 44 UFO believers 44 comet nucleus 44 Saturnian moon Titan 44 Asteroid 44 outer planets 44 NASAs 44 Manipulative Extraterrestrials 44 Kuiper Belt Object 44 paranormal 44 alternate universes 44 transhuman 44 moonbase 44 moonquakes 44 COROT exo 3b 44 worldly beings 44 Fashion Movie Reviews 44 faraway galaxy 44 Comet Hartley 2 44 Morbius 44 UFO lore 44 father Jor El 44 Martian meteorite 44 SETI 44 Tau Ceti 44 NEAs 44 Kuiper belt 44 terraformed 44 Evolution Explorer 44 Prophet Yahweh 44 robotic rovers 44 Norrin Radd 44 satellites orbiting Earth 44 galactic alignment 44 NASA LCROSS 44 axions 44 Higgs bosons 44 Mars Odyssey orbiter 44 prebiotic molecules 44 Galilean satellites 44 disembodied spirits 44 Solar System 44 Spaceguard Survey 44 extrasensory perception ESP 43 ufologist 43 interstellar dust grains 43 Churyumov Gerasimenko 43 GJ #b [001] 43 Martian rover 43 Martian rocks 43 extrasolar planetary systems 43 cosmic collisions 43 celestial beings 43 Opportunity rover 43 Voyager probes 43 Unidentified Flying Objects 43 Carl Sagan 43 Batarian 43 P/# A2 43 extrasolar planetary 43 extrasolar worlds 43 Nasa Deep Impact 43 radial velocity technique 43 Mars Rover 43 wormhole 43 UFO abductions 43 interstellar space 43 Pluto Charon 43 asteroid impacts 43 Asgardians 43 extrasolar planets 43 Spaceguard 43 spaceships 43 exoplanets orbiting 43 exopolitics 43 planet Nibiru 43 gravitational anomalies 43 meteoroid 43 Halley comet 43 CoRoT 9b 43 Upsilon Andromedae 43 alien visitations 43 alien invasions 43 posthuman 43 Xindi 43 Upsilon Andromedae b 43 OSIRIS REx 43 giant squids 43 Interplanetary 43 otherworldly 43 interplanetary spacecraft 43 Mojzsis 43 NASA rovers Spirit 43 astral projection 43 Mars landers 43 Uranian 43 Flying saucers 43 planetwide 43 astronomical phenomena 43 journal Meteoritics 43 comet Churyumov Gerasimenko 43 Comet #P/Churyumov-Gerasimenko 43 extrasolar planet 43 Epsilon Eridani 43 magnetic monopoles 43 lunar regolith 43 Fermi paradox 43 APXS 43 ufology 43 Titan Saturn 43 Earthling 43 Jupiter moon Io 43 moons Phobos 43 frigid arctic plains 43 cosmic ray 43 noosphere 43 lunar landings 43 Extrasolar 43 Emily Lakdawalla 43 Hank Pym 43 Gallaxhar 43 lunar surface 42 unobtainium 42 Galactic Federation 42 Kryptonians 42 ancient Mayans 42 Saturn moons 42 xenomorph 42 antigravity 42 gravitational wave 42 rover Sojourner 42 planetary scientist 42 Unidentified Flying Object 42 cryptid 42 technological singularity 42 nonhuman 42 meteoroid impacts 42 Professor Pillinger 42 highly elliptical orbits 42 Allspark 42 six wheeled rover 42 alien abductees 42 earthly 42 mutant monsters 42 Stardust NExT mission 42 Epsilon Aurigae 42 EPOXI spacecraft 42 asteroid Itokawa 42 Deep Impact Extended 42 prehistoric 42 Planetary Transits 42 Panspermia 42 cometary impacts 42 Mars rovers Spirit 42 spaceborne 42 Nasa Kepler 42 planets asteroids 42 posthumans 42 Extraterrestrial Intelligence SETI 42 lifeform 42 archons 42 smallest exoplanet 42 Interstellar 42 binary asteroid 42 interstellar grains 42 spacefaring civilization 42 Starstream Research 42 planetary Transits 42 astrophysical 42 Martian arctic plains 42 Jupiter moons 42 mythological beings 42 Mercury magnetosphere 42 lander Beagle 2 42 Comet Boethin 42 planetoids 42 NASA Cassini 42 Earth 42 carbon cenospheres 42 NASA Mars rover 42 albino dinosaur 42 God Particle 42 planet Cybertron 42 Pandoran 42 immortal beings 42 microbial 42 universe 42 Klaatu 42 xenomorphs 42 exoplanet 42 Fermi telescope 42 alien Klaatu 42 Jacques Patenet 42 matter antimatter asymmetry 42 GJ#b 42 creatures inhabiting 42 homochirality 42 Gallaxhar Rainn Wilson 42 cosmological 42 Snowball Earth 42 Gallifrey 42 Apophis asteroid 42 SETI Institute 42 blackholes 42 Fomalhaut b 42 Visit SPACE.com 42 Asteroid Belt 42 spaceship 42 moons orbiting 42 Pluto Eris 42 insect cyborgs 42 retrograde orbit 42 Asteroids 42 sea serpents 42 primordial soup 42 Higgs particle 42 Elenin 42 Wolszczan 42 antarctic 42 Necromongers 42 Itokawa asteroid 42 Particle physics 42 Galactus 42 Sasselov 42 Anunnaki 41 Percival Lowell 41 #P/Churyumov-Gerasimenko 41 Neil deGrasse Tyson 41 sized planets orbiting 41 Enceladus 41 Chicxulub 41 gastropod 41 exosolar planets 41 Nasa 41 robotic Cylons 41 Martian microbes 41 Phoebe orbits 41 Martian craters 41 Apokolips 41 planetary surfaces 41 particles WIMPs 41 comets orbiting 41 stationary lander 41 moon 41 Martian dust 41 Asgardian 41 Martian equator 41 Viking Orbiter 41 energetic cosmic rays 41 Predalien 41 fearsome creatures 41 Earthlike 41 Shi'ar 41 buckypaper virtually 41 NASA rovers 41 unmanned probes 41 rovers 41 Mimivirus 41 poltergeists 41 rover Opportunity 41 planetary alignments 41 Laurie Leshin 41 ALH# 41 smoothest flattest spot 41 CoRoT 41 Earth asteroids 41 phyllosilicates 41 JIMO 41 ammonia hydrates 41 NASA Kepler telescope 41 quantum weirdness 41 Martian lander 41 microworld 41 cylon 41 ExoMars rover 41 supermassive 41 fossilized creatures 41 sentient intelligent 41 wormholes 41 Japan Hayabusa spacecraft 41 NASA Voyager spacecraft 41 comet dust 41 Zecharia Sitchin 41 KBOs 41 Lunar Reconnaissance Orbiter LRO 41 Saturnian moon 41 planets moons 41 Comet Hartley 41 Kepler #b 41 Stan Romanek 41 Jenniskens 41 Astrophysics MOA 41 telescopes astronomers 41 neutrino 41 DIXI 41 Galileo spacecraft 41 neutrino oscillation 41 SuperCroc 41 neutron spectrometer 41 alien invaders 41 albedo reflectivity 41 moon Io 41 alien infestation 41 gravitational waves 41 MN4 41 Sojourner rover 41 terrestrial 41 Mars Spirit rover 41 Higgs Boson 41 sci fi 41 planets comets 41 comet McNaught 41 Baptistina 41 NASA Astrobiology Institute 41 astronautical 41 mythological beast 41 Kryptonian 41 archangel Michael 41 Gribble Dan Fogler 41 robotic landers 41 cryptozoology 41 Convection Rotation 41 primordial 41 USG Ishimura 41 Tunguska meteorite 41 Cosmic Cube 41 asteroid belt 41 Cade Skywalker 41 Twelve Colonies 41 Anakin Skywalker transformation 41 Apophis 41 symbiotes 41 regolith 41 spacecrafts 41 Lunar Prospector 41 Giovanni Schiaparelli 41 volcano Olympus Mons 41 insectlike 41 mystical realm 41 impending apocalypse 41 Jeffrey Kargel 41 nonliving 41 ray Space Telescope 41 Astrophysicists 41 Von Doom 41 interstellar particles 41 Eerie Silence 41 BLG #Lb 41 Orbiter LRO 41 Sitchin 41 cometary debris 41 asteroid hurtling 40 exo planets 40 Skrull invasion 40 EPOXI 40 planetary exploration 40 Mars rover 40 beings 40 BP Psc 40 Larry Soderblom 40 lunar soil 40 interstellar dust 40 Alice Milla Jovovich 40 robotic lander 40 spacecraft 40 meek inheriting 40 precognitive 40 Alycia Weinberger 40 strangelets 40 sasquatches 40 Rubi Ka 40 Fermi Gamma ray 40 gravitational microlensing 40 Phobos Grunt 40 muon neutrino 40 NASA THEMIS 40 quantum entanglement 40 solar flares 40 archaeo 40 cyborgs 40 astronomer Percival Lowell 40 cometary material 40 interstellar cloud 40 astrophysical objects 40 simulated Martian 40 astral plane 40 invading aliens 40 Toutatis 40 Biker Mice 40 humanoid creature 40 Isidis Planitia 40 Spirit rover 40 mythical beings 40 Extra Terrestrials 40 GQ Lupi 40 Clementine spacecraft 40 Mandushev 40 superheavy elements 40 Zartog 40 extinct mammal 40 unexplainable phenomena 40 prehistoric creatures 40 extraterrestrial invaders 40 Cassini Huygens spacecraft 40 cosmic radiation 40 Flint Marko 40 Martian polar 40 rovers Spirit 40 lunar equator 40 Observatory STEREO 40 astrobiologist 40 Mogadorians 40 cosmic cannibal 40 Kuiper Belt 40 Martian arctic 40 distant suns 40 ESA Mars 40 Nasa Mars Reconnaissance 40 Saturn moon Enceladus 40 celestial object 40 Apollo missions 40 EPOCh 40 quantum criticality 40 Pluto Kuiper Belt 40 mosasaurs 40 Diviner 40 Mars Phobos 40 orbiting Saturn 40 GRB #B 40 twin Voyager spacecraft 40 lunar orbiters 40 Martian crater 40 sasquatch 40 lunar landing 40 dexterous robot 40 Stardust spacecraft 40 demonic 40 LADEE 40 innermost planet 40 Galaxy Evolution 40 Na'vi avatar 40 telepathy 40 called gray hematite 40 terrestrial planets 40 precognition 40 asteroid Vesta 40 Kepler 9c 40 detect gravitational waves 40 Planetary 40 Mars northern latitudes 40 cryptids 40 WASP #b 40 Charon Pluto 40 stargate 40 vampires ghosts 40 Mars Lander 40 single celled microorganisms 40 circumstellar 40 Comet Hale Bopp 40 alien creature 40 asteroid collides 40 primitive organisms 40 sterile neutrinos 40 Reptilian 40 Rubi ka 40 reentry capsule 40 Bigfoot Sasquatch 40 alternate universe 40 NASA Opportunity rover 40 Interstellar Boundary Explorer 40 Bonnie Buratti 40 Meteorites 40 Halley Comet 40 slimy creatures 40 coronal loops 40 otherworld 40 Paul Ballard Tahmoh 40 Overmind 40 Nectocaris 40 circumstellar disks 40 Saturn Cassini 40 prebiotic soup 40 Origins Spectral Interpretation 40 planets orbiting 40 Tycho Brahe 40 Gerard Kuiper 40 Hai Genti 40 Svedhem 40 comet tail 40 HAARP 40 Daniel Faraday 40 planet TrES 40 neutralino 40 sentience 40 Shoemaker Levy 40 planetside 40 orbited Jupiter 40 mental telepathy 40 prebiotic chemistry 40 Mars Squyres 40 orbiting Cassini spacecraft 40 hydrostatic equilibrium 40 dustier stormier atmosphere 40 Ki Elisabeth Harnois 40 multiverse 40 Voyager spacecraft 40 comet nuclei 40 noctilucent clouds 40 saber tooth tigers 40 Jupiter gravitational pull 40 Hot Jupiters 40 Cardassian 40 icy moons 40 transiting exoplanet 40 quantum teleportation 40 robotic explorers 40 Cassini flyby 40 planetary science 40 Kuiper belt objects 40 moons circling 39 Lyn Cassady 39 chemtrail 39 meteor fragment 39 Alderaan 39 lunar meteorites 39 dirty snowballs 39 inner Oort Cloud 39 Mars orbiting spacecraft 39 reptilian humanoids 39 intelligent alien lifeforms 39 Wide Angle Search 39 elusive Higgs 39 planets orbiting stars 39 mysterious 39 circumstellar disk 39 Comet Lulin 39 goblins trolls 39 Earths 39 planet Tatooine 39 planet Gliese #c 39 Orbiter spacecraft 39 Mimzy 39 Trojan asteroids 39 faraway galaxies 39 protoplanets 39 Jonathan Lunine 39 Comet Elenin 39 Ki Adi Mundi 39 magnetic monopole 39 humanoids 39 Jedi warriors 39 Extrasolar Planet Observation 39 high temperature superconductivity 39 Martian meteorites 39 Huygens lander 39 Sara Seager 39 ExoMars 39 Di Achille 39 reptilian 39 Ripley Sigourney Weaver 39 Phoenix Mars Lander 39 nucleosynthesis 39 UFO spotters 39 olivine mineral 39 self replicating 39 Molotov Alva 39 Earths orbiting 39 distant galaxy 39 dwarf spheroidal galaxies 39 cybernetic 39 psychokinesis 39 Saturnian system 39 supernatural occurrences 39 comet Lulin 39 Martian invaders 39 superluminal 39 bolide 39 moon Mab 39 quark gluon 39 QQ# 39 orbiting Mars 39 nebular 39 subspace 39 subatomic particle 39 Rosetta spacecraft 39 RHESSI 39 director Charles Elachi 39 trans Neptunian 39 demonic hordes 39 planets orbiting sun 39 Samuel Oschin Telescope 39 mythical creatures 39 extrasolar planets orbiting 39 Charles Beichman 39 Earth biosphere 39 simulated lunar 39 astronomer Seth Shostak 39 Murchison meteorite 39 Outer Space Treaty 39 Anthony Remijan 39 J'onn J'onzz 39 Mars moon Phobos 39 serial killer Sylar 39 earths 39 Jovian moons 39 cybernetic organisms 39 hypervelocity star 39 Rosaly Lopes 39 polygon patterns 39 twin rover Spirit 39 Sylar Zachary Quinto 39 Billy Mumy 39 Xenu 39 Viking Lander 39 galactic cosmic rays 39 prehistoric reptile 39 Gungans 39 Sensing Satellite LCROSS 39 NASA astrobiology 39 # Apophis 39 stellar occultations 39 mutated creatures 39 SMBH 39 Toby O'Dare 39 Cosmologists 39 Higgs boson 39 COROT 7b 39 Ufologists 39 Deep Impact flyby spacecraft 39 Dr. Totenkopf 39 terra forming 39 SETI @ home 39 landers 39 ESA Integral 39 meteorite impacts 39 bloodthirsty vampire 39 Comet Tempel 1 39 polar craters 39 Kurt Retherford 39 phyllosilicate 39 arctic plains 39 psychic powers 39 Ulysses spacecraft 39 ADM Aeolus 39 Abominable Snowman 39 galaxy 39 body snatchers 39 paranormal occurrences 39 Henize #-# 39 HD #b [002] 39 Hanso Foundation 39 UFO sightings 39 chondritic meteorites 39 asteroid Steins 39 Comet Churyumov Gerasimenko 39 bigfoot 39 PKE meter 39 dinosaur extinction 39 spacecraft Cassini 39 pre biotic 39 Neutron Spectrometer 39 Martian plains 39 Utapau 39 planets Uranus 39 weaponizing 39 shapeshifters 39 girls Battlestar Gallactica 39 Plutonian 39 Giant Squid 39 proton decay 39 magnetic polarity 39 celestials 39 Roswell UFO 39 shadowy craters 39 hydrothermal vent 39 Antimatter 39 Opportunity Mars rover 39 Boethin 39 spacecraft flyby 39 CoRoT satellite 39 Saturnian 39 transhumanists 39 Franklin Delano Bickley 39 outer reaches 39 Comet Halley 39 Sycorax 39 Nanobots 39 hematite mineral 39 Hale Bopp 39 catastrophism 39 dinosaurs 39 planetary nebulae 39 Mars Odyssey spacecraft 39 Kepler Mission 39 NASA Spirit rover 39 Trilobites 39 Romulan 39 hypervelocity 39 SIM PlanetQuest 39 asteroid Eros 39 Dantooine 39 inner asteroid belt 39 comets moons 39 supernova explosion 39 science fiction 39 Goa'uld 39 giant squid 39 astronomer 39 meteor fireball 39 creature 39 Planck satellite 39 monstrous creatures 39 OGLE TR #b 39 DISR 39 gall wasp 39 Deep Impact 39 electromagnetic flux 39 Tomar Re 39 Earthly contamination 39 MARSIS radar 39 Syrtis Major 39 Dr. Nefarious 39 anthropic principle 39 quasi mystical 39 Raelian religious 39 impactor spacecraft 39 gray hematite mineral 39 mightiest heroes 39 Permian extinction 39 Pluto demotion 39 reptilian creatures 39 Gravitational waves 39 PSR J# 39 demoted Pluto 39 polar 39 robotic rover Spirit 39 electron neutrinos 39 Exoplanets 39 telepaths 39 Comet Encke 39 infrared telescopes 39 icy moon Enceladus 39 orbiting 39 J'onn 39 Magneto Brotherhood 39 microbial ecosystems 39 astrophysical phenomena 39 interstellar dust particles 39 NASA Deep Impact 39 smoothest flattest 39 Skynet 38 twin Mars rovers 38 NASA twin rovers 38 unfathomed 38 radial velocity method 38 planetary explorations 38 Hayabusa spacecraft 38 IBEX spacecraft 38 lunar exploration 38 astronomical objects