Related by context. Frequent words. (Click for all words.) 69 silicates 67 spherules 66 olivine 62 aragonite 62 lavas 62 solar nebula 62 iron oxides 62 planetesimals 61 igneous rocks 61 meteorite impacts 61 meteorites 60 noble gases 60 isotopic composition 59 ALH# 59 regolith 59 silicate 59 igneous rock 59 nanosized 59 copper oxides 59 calcareous 59 basalts 59 ejecta 58 zircons 58 meteoroids 58 heavily cratered 58 isotope ratios 58 clasts 58 lunar soil 58 carbonaceous 58 magmas 58 clathrates 58 stromatolites 58 microfossils 57 Meridiani 57 osmium 57 elemental composition 57 calcite 57 nanoclusters 57 basaltic 57 dwarf galaxies 57 planetary nebulae 57 magnetars 57 lithosphere 56 zeolites 56 rocky planets 56 Kuiper belt 56 monazite 56 Earthlike 56 protoplanetary disk 56 manganese oxide 56 Meteorites 56 biogenic 55 sulphates 55 nuclei 55 moonlets 55 snail shells 55 oxygen isotopes 55 oceanic crust 55 outer crust 55 continental crust 55 igneous 55 noctilucent clouds 55 terrestrial planets 54 cuprates 54 hematite 54 spinel 54 exosphere 54 Valles Marineris 54 diatoms 54 Oort Cloud 54 dwarf galaxy 54 icy crust 54 foraminifera 54 salt crystals 54 nanobubbles 54 baryons 54 supernova explosions 54 Higgs particle 54 nitrogen atoms 54 apatite 54 radioactive decay 54 prokaryotes 53 organic molecules 53 mud volcanoes 53 tetrahedral 53 abiotic 53 meteorite 53 microstructures 53 chemically inert 53 planetary nebula 53 basalt 53 Chicxulub 53 chemical composition 53 siliceous 53 abundances 53 gravitational attraction 53 supernova explosion 53 sedimentary rock 53 galaxy clusters 53 aerosol particles 53 electron density