Related by context. Frequent words. (Click for all words.) 63 gravitationally 63 ionized gas 62 Earth magnetosphere 62 spiral galaxies 62 Kuiper belt 62 planet orbits 61 globular cluster 61 accretion disk 61 distant galaxy 60 gravitational attraction 60 dwarf galaxies 60 supernova explosion 60 interstellar medium 60 orbits 60 hot Jupiters 60 Jupiter Saturn 59 magnetic fields 59 X ray emission 59 planets 59 dwarf galaxy 59 terrestrial planets 59 ejecta 59 phonons 59 magnetosphere 58 magnetar 58 nuclei 58 elliptical galaxies 58 rocky planets 58 galaxy 58 interstellar dust 58 Eta Carinae 58 nebula 58 HD #b [002] 58 supernova explosions 58 silicates 58 super Earths 57 vortices 57 brown dwarfs 57 spacetime 57 Iapetus 57 galaxies 57 spiral galaxy 57 ecliptic 57 circular orbit 57 atomic nuclei 57 excitons 57 globular clusters 57 GRBs 57 Andromeda galaxy 57 neutron star 56 comet nucleus 56 nebulae 56 Saturn rings 56 galaxy clusters 56 filaments 56 brown dwarf 56 spherical 56 Andromeda Galaxy 56 supermassive black hole 56 auroral 56 unaided eye 56 meteoroids 56 Orion Nebula 56 quasar 56 lithosphere 56 Crab Nebula 56 asteroid belt 56 galaxy cluster 55 Enceladus 55 planets orbiting 55 XMM Newton 55 astronomical objects 55 distant galaxies 55 elliptical orbit 55 muons 55 habitable planet 55 oxygen atom 55 WIMPs 55 celestial object 55 heliosphere 55 celestial bodies 55 orbiting 55 asteroids 55 interstellar space 55 planet orbiting 55 infrared wavelengths 55 radiative 55 equatorial regions 55 gravitational tug 55 torus 55 aerosol particles 55 atoms 55 magnetic flux 55 supernova remnant 54 velocities 54 Sedna 54 Jupiter Saturn Uranus 54 Milky Way Galaxy 54 Lutetia 54 Fomalhaut 54 habitable planets