Related by context. Frequent words. (Click for all words.) 63 planetary nebulae 59 WASP #b 57 magnetars 56 Jupiter Saturn 56 terrestrial planets 56 orbiting planets 56 active galactic nuclei 55 X ray emission 55 aurorae 55 celestial object 55 planets 54 Kuiper belt 54 Oort Cloud 54 nebulae 54 Haumea 54 Venusian 54 supernova explosion 54 Gamma ray bursts 54 Crab Nebula 54 dwarf galaxies 54 supernova remnants 53 planet orbits 53 solar corona 53 gravitational attraction 53 geomagnetic storms 53 Sunspots 52 hot Jupiters 52 habitable planets 52 Eta Carinae 52 Galaxy Evolution 52 Mimas 52 Andromeda Galaxy 52 rocky planets 52 meteoroids 52 XMM Newton 52 celestial bodies 52 polar vortex 52 elliptical galaxies 52 habitable zones 52 unaided eye 52 globular cluster 52 star Gliese 51 globular clusters 51 auroral 51 COROT 51 Saturn rings 51 outer planets 51 orbits 51 Andromeda galaxy 51 magnetar 51 ecliptic 51 redshifts 51 innermost planet 51 colliding galaxies 51 Solar System 51 planetary nebula 51 Cosmic rays 51 solar irradiance 50 brown dwarfs 50 gravitationally 50 Pulsars 50 moons 50 planets orbiting 50 radial velocity 50 interplanetary spacecraft 50 astronomical objects 50 GRBs 50 spiral galaxies 50 Cancri 50 visible wavelengths 50 distant galaxy 50 ionospheric 50 anisotropy 50 solar nebula 50 gravitational tug 50 Sedna 50 solar flares 50 Orion Nebula 50 oscillations 50 shorter wavelengths 50 dwarf galaxy 50 Earth magnetosphere 50 sunspots 50 Galaxies 49 infrared wavelengths 49 interstellar dust 49 atmospheric turbulence 49 Meridiani 49 galaxy clusters 49 planet orbiting 49 galaxies 49 HD #b [002] 49 Gamma rays 49 photometry 49 Saturn moons 49 planetary 49 Gliese #g 49 comets 49 extrasolar planets 49 quasars 49 Phaethon