Related by context. Frequent words. (Click for all words.) 47 X ray emission 47 nebula 46 Fomalhaut 45 magnetar 45 constellation Leo 45 Sunspot 45 Eta Carinae 45 Mimas 45 supernova 44 accretion disk 44 galaxy cluster 43 Betelgeuse 43 spiral galaxies 43 sunspot 42 constellation Perseus 42 Large Magellanic Cloud 42 supernova remnant 42 auroral 42 planet orbiting 42 HD #b [002] 42 quasar 41 planet orbits 41 XMM Newton 41 supernova explosion 41 globular cluster 41 extrasolar planet 41 Andromeda Galaxy 41 constellation Orion 41 unaided eye 41 dwarf galaxy 40 spiral galaxy 40 Scorpius 40 Crab Nebula 40 Sunspots 40 Kuiper belt 40 supernova explosions 39 distant galaxy 39 gamma ray burst 39 Cassiopeia 39 nebulae 39 celestial object 39 Sandwich Islands 39 Orion Nebula 39 terrestrial planets 38 aurora 38 Andromeda galaxy 38 Arcturus 38 infrared wavelengths 38 galaxy 38 lavas 38 bluish 38 constellation 37 supernovae 37 Nebula 37 ionized gas 37 Cancri 37 equator 37 Deneb 37 occultation 37 OGLE 36 fainter 36 brown dwarf 36 Aurora Borealis 36 interferometry 36 Milky Way galaxy 35 Milky Way Galaxy 35 Venusian 35 Gamma ray bursts 34 Milky Way 34 pulsar 34 Spica 34 ecliptic 34 cosmic ray 34 Jupiter 34 gamma rays 34 Jupiter Saturn 34 planets orbiting 34 orb 34 Sedna 34 remnant 34 globular clusters 34 Ordovician 34 reemerges 33 lake sediments 33 chargeability anomaly 33 COROT 33 Uranus 33 extrasolar planets 33 observable universe 32 planetoid 32 volcanic crater 32 Gliese 32 Andromeda 32 planets 32 quasars 32 Phobos 32 Leonids 31 Alpha Centauri 31 redshift 31 ESO Very Large Telescope 31 Little Dipper