Related by context. Frequent words. (Click for all words.) 57 convective 57 cosmic ray 57 ejecta 55 constellation Perseus 54 meteoroids 54 planetary nebulae 54 meteoroid 54 auroral 54 constellation Leo 54 spherules 53 solar nebula 53 X ray emission 52 cirrus clouds 52 cometary 52 accretion disk 52 coronal mass ejection 52 planetary nebula 52 cosmic rays 52 basaltic 52 silicates 51 Geminids 51 Leonids 51 Crab Nebula 51 Jupiter Saturn 51 aerosol particles 51 interstellar dust 51 olivine 50 Phaethon 50 dwarf galaxies 50 Eta Carinae 50 magnetic reconnection 50 Earth magnetosphere 50 water vapor 50 Andromeda Galaxy 50 Leonid meteor shower 50 ionospheric 50 troposphere 49 gamma rays 49 Halley comet 49 Saturn moon Enceladus 49 reddish hue 49 celestial 49 Haumea 49 visible wavelengths 49 HD #b [002] 49 solar corona 49 lavas 49 Saturn rings 49 occultation 49 Milky Way Galaxy 49 ionized gas 49 magmatic 49 supernova explosions 48 geomagnetic storms 48 supermoon 48 Galaxy Evolution 48 meteors 48 equatorial regions 48 comet 48 brown dwarfs 48 comets 48 neutron star 48 supernova explosion 48 ionosphere 48 meteor 48 cumulus 48 igneous 48 distant galaxy 48 nebula 48 Sunspots 48 ionised 48 cosmic radiation 48 interstellar medium 48 Kuiper belt 48 COROT 48 XMM Newton 48 active galactic nuclei 48 cumulus clouds 48 equatorial 48 ITCZ 48 meteor shower 47 astrophysicists 47 Perseids 47 magnetosphere 47 dwarf galaxy 47 mid latitudes 47 silicate 47 supernova 47 Iapetus 47 magnetar 47 NASA Cassini 47 meteorites 47 globular cluster 47 Sunspot 47 Solar System 47 dynamical 47 atmospheric 47 supernova remnant 47 crustal 47 Cabeus crater 47 meteor showers