Related by context. Frequent words. (Click for all words.) 44 galactic 41 Saturn moons 41 orbiting 39 galaxy clusters 39 gravitational 39 distant galaxy 39 galaxies 38 magnetosphere 38 brown dwarfs 38 quasar 38 astrophysical 37 rocky planets 37 supernova explosions 37 Milky Way Galaxy 37 gravitational pull 37 spiral galaxies 36 starlight 36 dwarf galaxies 36 congregating 36 forming 36 zipping 36 neutron star 36 distant galaxies 36 encircling 36 gravitationally 35 cosmic rays 35 planet orbiting 35 galaxy cluster 35 gravitational waves 35 clumping 35 terrestrial planets 35 astrophysicists 35 nebulae 35 neighborhood 35 neutron stars 35 asteroid 35 immediate vicinity 35 infilling 35 Earth asteroids 35 supernova explosion 35 orbits 34 extrasolar planet 34 circling 34 heliosphere 34 interstellar 34 Milky Way 34 galaxy 34 X ray Observatory 34 contaminating 34 neighborhoods 34 ejecta 34 interstellar dust 33 astronomers 33 radius 33 deforming 33 quasars 33 martian 33 planets 33 Milky Way galaxy 33 nebula 33 infiltrating 33 elliptical galaxies 33 GRBs 33 wandering 33 asteroids 33 supermassive black holes 33 Eta Carinae 33 dense 33 supernovae 33 neutrino 33 orbital 33 planetary 33 globular clusters 33 protrusion 33 occurring 33 cosmic 33 scattering 33 angular momentum 32 gamma rays 32 brown dwarf 32 exoplanet 32 coalescence 32 zooming 32 radiating 32 outer 32 exoplanets 32 supermassive black hole 32 magnetic fields 32 solar flares 32 dynamical 32 compartmentalizing 32 meteor 32 concentric rings 32 neutrinos 32 concentric 32 inhabiting 32 disintegrating 32 spiral galaxy 32 walking 32 destroying 32 hovering overhead