Related by context. Frequent words. (Click for all words.) 57 outer crust 55 spacetime 54 WASP #b 54 planetoid 53 accretion disk 53 silicon atoms 53 observable universe 52 torus 52 spherical 51 spherical shape 51 Hawking radiation 51 icy crust 51 protoplanetary disk 51 Kuiper Belt objects 51 ellipse 50 Kuiper belt 50 protoplasm 50 singularities 50 dwarf planets 50 HD #b [002] 50 planet Uranus 50 moonlets 49 heliosphere 49 thermosphere 49 solar corona 49 Oort Cloud 49 magnetar 49 active galactic nuclei 49 gravitational attraction 49 lunar soil 49 circular orbits 49 galaxy cluster 49 gravitational pull 49 planet 49 cosmic 49 dwarf planet 48 visible wavelengths 48 gravitationally 48 ionized gas 48 planetesimals 48 blob 48 shorter wavelengths 48 radiative 48 planetary nebulae 48 magnetars 48 celestial object 48 pentagons 48 quark gluon plasma 48 interstellar dust 48 globular 48 planets 48 solar nebula 48 neutron star 48 gravitational 48 Gamma rays 48 Iapetus 48 earths 48 habitable planet 47 hot Jupiters 47 Saturn rings 47 magnetised 47 parabola 47 isotropic 47 universe 47 albedo 47 lithosphere 47 moon Europa 47 comet nucleus 47 toroidal 47 dynamical 47 Jupiter Saturn Uranus 47 meteoroid 47 orbits 47 cirrus 47 elliptical orbit 47 distant galaxy 47 ejecta 47 Bose Einstein condensate 46 Earth magnetosphere 46 electron density 46 magnetic fields 46 -# degrees Fahrenheit [002] 46 convex 46 magnetosphere 46 nebula 46 comet tail 46 Gliese #g 46 planet orbits 46 planetary nebula 46 Martian rocks 46 galaxy formation 46 ionised 46 Valles Marineris 46 habitable zones 46 quantum gravity 46 heliosheath 46 macrocosm 46 Einstein theory 46 Cosmologists 46 funhouse mirror 46 Cosmic rays