Related by context. Frequent words. (Click for all words.) 65 galaxy NGC 63 Carina Nebula 63 X ray emission 62 Eagle Nebula 62 polar vortex 61 protoplanetary disk 61 moonlets 60 ionized gas 60 magnetic reconnection 59 protostar 58 moon Enceladus 58 supernova remnants 58 accretion disk 58 protostars 58 planetary nebula 58 icy moons 58 nebula 58 supernova remnant 58 auroral 58 Oort Cloud 58 WASP #b 58 exosphere 57 Hubble observations 57 photosphere 56 Cepheids 56 constellation Sagittarius 56 constellation Virgo 56 planetary nebulae 56 supernova explosion 56 globular cluster 56 substorm 56 Valles Marineris 56 comet tail 56 aurorae 56 planet Uranus 56 solar nebula 55 dwarf galaxy 55 spiral galaxies 55 Saturn rings 55 torus 55 Eta Carinae 55 spiral galaxy 55 ejecta 55 galaxy cluster 55 stellar nurseries 54 Kuiper belt 54 threadlike 54 anisotropy 54 magnetar 54 globular clusters 54 Galileo spacecraft 54 galaxy formation 54 Voyager spacecraft 54 diffraction pattern 54 heavily cratered 54 Earth magnetosphere 54 vortices 54 interferometric 54 Saturn moon Enceladus 54 supernova explosions 53 Olympus Mons 53 orbiting planets 53 noctilucent clouds 53 circular orbits 53 elliptical galaxies 53 Mimas 53 distant galaxy 53 ultraviolet wavelengths 53 GRBs 53 Fig. 1A 53 quasar 53 radial velocity 53 filaments 53 Galaxy Evolution 53 graphitic 53 Martian equator 53 colliding galaxies 53 VIRTIS 52 active galactic nuclei 52 undersea volcanoes 52 Kuiper Belt objects 52 solar corona 52 Saturn moons 52 Crab Nebula 52 helices 52 wavelike 52 quartz carbonate veins 52 interstellar medium 52 accreting 52 clasts 52 gravitational lensing 52 excitations 52 helium atoms 52 innermost planet 52 gravitational lens 52 graben 52 HAT P 52 Martian dust 52 cirrus 52 superfluid 52 Orion Nebula