Related by context. Frequent words. (Click for all words.) 69 solar nebula 63 radioactive decay 63 isotopic composition 63 abundances 63 osmium 62 magmas 62 lavas 60 baryons 60 planetesimals 60 zircons 60 olivine 59 oxygen isotopes 59 ejecta 59 elemental composition 59 foraminifera 59 supernova explosions 58 iron oxides 58 X ray emission 58 silicates 58 marine sediments 58 stromatolites 57 perovskite 57 alpha particles 57 porphyrin 57 polycyclic aromatic hydrocarbons 57 silicate 57 isotopic 57 electron density 57 Gamma rays 56 biogenic 56 planetary nebulae 56 apatite 56 spectral signature 56 spectral signatures 56 dwarf galaxies 56 interstellar dust 56 monazite 56 aerosol particles 56 carbonaceous 56 active galactic nuclei 55 methanogens 55 lake sediments 55 chemical composition 55 basalts 55 supernova explosion 55 Gamma ray bursts 55 sedimentary rock 55 lunar soil 55 rocky planets 55 WASP #b 55 zeolites 55 nanosized 55 morphologies 55 atmospheric methane 55 spherules 55 microfossils 55 igneous rocks 55 lithosphere 55 nuclei 54 magnetars 54 americium 54 HD #b [002] 54 supernovae 54 GRBs 54 interstellar medium 54 comets 54 Cyanobacteria 54 magmatic 54 cuprates 54 adenine 54 supernova remnants 54 Oort Cloud 54 redshifts 53 galaxy formation 53 Hawking radiation 53 kerogen 53 excitons 53 basaltic 53 crystalline structure 53 prokaryotes 53 organic molecules 53 Bose Einstein condensate 53 chirality 53 meteoroids 53 regolith 53 meteorites 53 Haumea 53 terrestrial planets 53 Valles Marineris 53 Cosmic rays 53 Type Ia supernovae 52 magnetar 52 abiotic 52 deuterium 52 dwarf galaxy 52 optical wavelengths 52 Meridiani 52 igneous 52 solar corona 52 elliptical galaxies 52 eukaryotic cells