Related by context. Frequent words. (Click for all words.) 61 meteorites 59 meteorite 56 lunar soil 54 Voyager spacecraft 52 cometary 51 comet Wild 50 spherules 50 microfossils 49 infrared telescope 49 Meteorite 49 comet dust 49 fossils 49 interstellar dust 49 Mars Pathfinder 49 regolith 49 comet 48 zircons 48 orbiting Mars 48 Meteorites 48 ejecta 48 dinosaur footprints 48 dinosaur fossils 48 Lutetia 48 Martian landscape 48 Martian surface 47 Meridiani 47 Spitzer Space Telescope 47 spectrometers 47 meteoroid 47 olivine 47 lunar surface 47 XMM Newton 47 Saturn moon 47 oceanic crust 46 volcanically active 46 Stardust spacecraft 46 orbiting Saturn 46 Martian arctic 46 orbiting spacecraft 46 martian surface 46 Martian soil 46 extrasolar planet 46 mineralogy 46 rover Opportunity 46 Galaxy Evolution 46 Large Magellanic Cloud 46 meteor 46 Titan Saturn 45 Kuiper Belt 45 Halley comet 45 garnets 45 Saturn moons 45 silicates 45 dinosaur fossil 45 Phaethon 45 petrified wood 45 Apollo lunar 45 classical antiquity 45 Jupiter moons 45 fossilized remains 45 supernova explosion 45 dinosaur bones 45 Cassini Huygens 45 Mars orbiter 45 archaeological finds 45 Opportunity rover 45 asteroid 45 astronomers 45 comet nucleus 44 New Horizons spacecraft 44 extrasolar planets 44 Itokawa 44 NASA Cassini spacecraft 44 solar nebula 44 Orbiter 44 ESA Mars 44 asteroid belt 44 sedimentary rock 44 rovers Spirit 44 Chicxulub 44 Victoria Crater 44 Fomalhaut 44 telescope 44 meteoroids 44 kimberlitic 44 astrobiologists 44 geologically active 44 asteroids 44 agates 44 stromatolites 44 Saturn rings 44 spacecraft 44 microscopic imager 44 Phobos 43 hematite 43 martian 43 fossil 43 Kuiper belt 43 comets 43 trilobites 43 spacecraft orbiting