Related by context. Frequent words. (Click for all words.) 66 distant galaxy 64 Orion Nebula 64 Milky Way Galaxy 63 spiral galaxy 63 galaxy cluster 63 nebula 62 HD #b [002] 62 Milky Way galaxy 62 Eta Carinae 61 Betelgeuse 61 quasar 59 Large Magellanic Cloud 58 Milky Way 58 supermassive black hole 58 spiral galaxies 58 X ray emission 58 planet orbiting 57 GRBs 57 Cassiopeia 57 gamma ray burst 57 galaxy 57 distant galaxies 56 planets orbiting 56 redshift 56 infrared wavelengths 56 ringed planet 56 dwarf galaxy 56 unaided eye 56 Gliese 56 Scorpius 55 quasars 55 orbits 55 elliptical galaxies 55 extrasolar planets 55 supernova explosion 55 extrasolar planet 54 XMM Newton 54 globular clusters 54 galaxies 54 umbra 54 celestial objects 54 brown dwarf 53 Enceladus 53 Deneb 53 Iapetus 53 Sedna 53 perigee 53 occultation 53 ellipse 53 fainter 53 Pleiades 52 nebulae 52 orbiting 52 planets 52 Uranus 52 pulsar 52 brown dwarfs 52 gamma ray bursts 52 Arcturus 52 Saturn rings 51 rocky planets 51 exoplanets 51 aurora 51 supermassive black holes 51 Earth asteroids 51 neutron star 51 Kuiper Belt 51 Spitzer Space Telescope 50 constellation 50 Leonids 50 Alpha Centauri 50 Saturn moons 50 galaxy clusters 50 ejecta 50 supernova explosions 50 comet nucleus 50 THEMIS 50 Ophiuchus 50 elliptical orbit 50 pulsars 50 supernovae 50 chargeability anomaly 50 equator 49 supernova 49 super Earths 49 Very Large Telescope 49 comet 49 terrestrial planets 49 cosmic microwave background 49 optical telescopes 49 supernovas 49 Lutetia 49 NASA Cassini spacecraft 49 exoplanet 49 Cassini 49 astronomers 48 Nebula 48 moon Titan 48 sunspot 48 ESO Very Large Telescope 48 infrared telescope