Related by context. Frequent words. (Click for all words.) 62 solar nebula 61 isotope ratios 59 electron density 59 elemental composition 58 isotopic composition 57 aerosol particles 57 osmium 57 foraminifera 57 spherules 57 olivine 57 lunar soil 56 baryons 56 ejecta 56 isotopic 56 oxygen isotopes 56 radioactive decay 56 WASP #b 56 planetesimals 56 spectral signatures 55 silicates 55 abundances 55 chemical composition 55 protoplanetary disk 54 regolith 54 tetrahedral 54 spectral signature 54 lavas 54 numerical simulations 54 monazite 54 elliptical galaxies 54 supernova explosions 54 perovskite 54 Cepheids 54 moonlets 54 Cosmologists 54 redshifts 54 geoid 54 lithosphere 54 nanosized 53 GPa 53 spectra 53 supernova explosion 53 crystal lattice 53 silicon atoms 53 planetary nebulae 53 nitrogen atoms 53 particle sizes 53 comet nucleus 53 Hawking radiation 53 X ray emission 53 igneous rocks 53 unobservable 52 magmas 52 eU#O# 52 nuclei 52 exciton 52 morphologies 52 SiO 2 52 crystalline structure 52 iron oxides 52 muon 52 frequency comb 52 Mini SAR 52 Computer simulations 52 excitations 52 magnetar 52 microfossils 52 MgO 52 deuterium 52 silicate 51 desorption 51 anisotropic 51 porphyrin 51 photometer 51 ionized gas 51 crystallographic 51 Oort Cloud 51 Fig. 1A 51 GRBs 51 polar vortex 51 radiocarbon 51 dopants 51 rocky planets 51 cuprates 51 caustic fusion 51 magnetization 51 optical wavelengths 51 heliosphere 51 Hubble observations 51 Meridiani 51 marine sediments 51 magnetars 51 circular orbits 51 basaltic 51 spectrographs 51 irradiance 50 hydroxyl 50 amplitudes 50 igneous rock 50 isotropic 50 zircons