Related by context. Frequent words. (Click for all words.) 60 morphologies 60 solar corona 59 planetary nebulae 58 X ray emission 57 ionized gas 57 comet tail 57 Gamma rays 56 aurorae 56 vortices 56 filaments 56 polar vortex 56 auroral 55 planetary nebula 55 visible wavelengths 55 starbursts 55 supernova explosions 55 haloes 55 nebulae 55 magnetars 55 corona 54 spiral galaxies 54 globular 54 magnetosphere 54 moonlets 54 protoplanetary disk 54 deformations 53 lava tubes 53 Cosmic rays 53 Cepheids 53 aerosol particles 53 orbiting planets 53 fluxes 53 Valles Marineris 53 interferometers 53 cumulus 53 striations 53 dipoles 53 ionised 53 optical wavelengths 52 silicates 52 volcanic vents 52 vortexes 52 infrared wavelengths 52 fluorophores 52 collagen fibers 52 landforms 52 ejecta 52 cusps 52 hemispherical 52 microstructures 52 toroidal 52 meteoroids 52 supernova explosion 52 dye molecules 52 Saturn rings 52 Earth magnetosphere 52 dust devils 52 magnetic flux 52 excitations 51 coronal 51 shorter wavelengths 51 lavas 51 nebula 51 interferometric 51 spectrographs 51 astronomical objects 51 WASP #b 51 Ultraviolet light 51 lava flows 51 Saturn moon Enceladus 51 supernova remnants 51 pulsations 51 oscillatory 51 magnetic reconnection 51 basaltic 51 CMEs 51 clasts 51 curvatures 51 nanoribbons 51 protrusions 51 colliding galaxies 51 oxygen isotopes 51 electron beams 51 active galactic nuclei 51 blobs 51 perturbations 50 wavelengths 50 lithosphere 50 sunrays 50 bilayer 50 planetesimals 50 hot Jupiters 50 Sunspots 50 cumulus clouds 50 ionospheric 50 sunspots 50 electron density 50 convective 50 oscillations 50 Hubble observations 50 laminar