Related by context. Frequent words. (Click for all words.) 52 extraterrestrial civilizations 49 Einstein theories 49 astronomical phenomena 49 extraterrestrial 49 nanobacteria 49 Oort Cloud 49 psychic phenomena 48 exosphere 48 Higgs particle 47 interplanetary spacecraft 47 quantum entanglement 46 Nibiru 46 ALH# 46 moon Enceladus 45 Hawking radiation 45 intelligent beings 45 nonhuman animals 45 Galileo spacecraft 45 astronomical objects 45 Gliese #g 45 Exoplanet 45 magnetars 45 Extraterrestrials 45 meteorite impacts 45 Earthlike 45 celestial bodies 45 substorm 44 irreducibly complex 44 singularity 44 Lunine 44 macroevolution 44 Saturn moon 44 Evolutionary biologists 44 extrasolar planets 44 irreducible complexity 44 Kuiper belt 44 noctilucent clouds 44 Voyager spacecraft 43 innermost planet 43 chemtrails 43 habitable planets 43 Changizi 43 outer space 43 Eagle Nebula 43 extraterrestrial beings 43 impactors 43 hydrothermal vent 43 Martian dust 43 Haumea 43 extrasolar planet 43 planet Uranus 43 astrobiologists 43 icy moons 43 alien civilizations 43 Cepheids 43 protoplanetary disks 43 stellar nurseries 43 Kuiper Belt objects 43 Chicxulub 43 Jupiter moons 43 Lagrangian 43 planets 42 ultraviolet wavelengths 42 singularities 42 SIRTF 42 WASP #b 42 asteroid 42 planetoid 42 elemental composition 42 exoplanet 42 interrelatedness 42 existence 42 meteoroid 42 Titan Saturn 42 Red Planet 42 Earth asteroids 42 heliosphere 42 UFOs 42 polar craters 42 alien spacecraft 42 origins 41 ETs 41 interstellar 41 planetary nebulae 41 cosmological 41 unobservable 41 God Particle 41 Exopolitics 41 magnetic reconnection 41 comets 41 alien beings 41 cometary 41 extraterrestrials 41 geoid 41 Sedna 41 observable 41 Galaxy Evolution 41 moon Charon 41 supernatural phenomena 41 discoverers 41 microlensing