Related by context. Frequent words. (Click for all words.) 57 WASP #b 55 supernova explosion 54 dwarf galaxy 53 supernova explosions 53 asteroid 53 Eta Carinae 52 meteoroid 52 Haumea 52 supercontinent 51 supernova remnants 51 Chicxulub 50 globular cluster 50 solar nebula 50 planetary nebulae 50 colliding galaxies 49 Oort Cloud 49 dwarf galaxies 49 observable universe 49 Kuiper belt 49 ejecta 49 neutron star 48 asteroids 48 Lutetia 48 planet orbits 48 globular clusters 48 neutron stars 48 terrestrial planets 47 polar vortex 47 GRBs 47 magnetars 47 H. erectus 47 magnetar 47 Andromeda galaxy 47 Large Magellanic Cloud 47 gamma ray burst 47 atomic nuclei 47 distant galaxy 47 brown dwarfs 47 impactor 47 Saturn rings 47 hot Jupiters 47 Andromeda Galaxy 46 planetary nebula 46 meteoroids 46 Milky Way galaxy 46 planet Krypton 46 Itokawa 46 galactic 46 super Earths 46 nuclei 46 supercells 46 orbiting planets 46 comet 46 Andromeda 46 elliptical galaxies 46 microsatellites 45 brown dwarf 45 galaxy clusters 45 pulsar 45 landmasses 45 comets 45 subatomic particle 45 Cosmic rays 45 rocky planets 45 R#a# 45 particle detectors 45 Kuiper Belt 45 magnetic reconnection 45 comet nucleus 45 asteroid Itokawa 45 galaxies 45 Martian equator 45 orbiting 45 star Gliese 45 positrons 45 cometary 45 morphologies 45 gravitational tug 45 orbits 45 Cabeus crater 45 quasars 44 single celled 44 basaltic 44 HD #b [002] 44 planetary 44 Voyager spacecraft 44 radioactive decay 44 Phaethon 44 supernova remnant 44 outer planets 44 Gamma ray bursts 44 active galactic nuclei 44 Galaxy Evolution 44 spiral galaxy 44 Gliese #g 44 planetoid 44 pyroclastic flow 44 planets 44 Earth magnetosphere 44 Milky Way Galaxy 44 accretion disk