Related by context. Frequent words. (Click for all words.) 61 Orion Nebula 60 extrasolar planet 60 distant galaxy 59 planet orbiting 59 HD #b [002] 59 planets orbiting 58 nebulae 57 Perseids 57 celestial objects 57 brown dwarf 57 infrared wavelengths 56 rocky planets 56 Eta Carinae 56 partial eclipse 56 extrasolar planets 56 skywatchers 56 Betelgeuse 55 GRBs 55 gamma ray burst 55 brown dwarfs 55 Spitzer Space Telescope 54 spiral galaxy 54 Milky Way galaxy 54 occultation 53 galaxy cluster 53 optical telescopes 53 meteor shower 53 globular clusters 53 Large Magellanic Cloud 53 distant galaxies 53 nebula 53 aurora 52 Milky Way Galaxy 52 quasars 52 fainter 52 XMM Newton 52 meteors 52 magnification 52 lunar eclipses 52 elliptical galaxies 51 astronomers 51 Lutetia 51 exoplanets 51 Perseid meteor shower 51 super Earths 51 perigee 51 gamma ray bursts 51 spiral galaxies 51 total lunar eclipse 51 Sedna 50 partial solar eclipse 50 bluish 50 quasar 50 meteor showers 50 Gliese 50 galaxies 50 Milky Way 50 telescopes 50 Saturn rings 50 redshift 50 orbits 50 dwarf galaxy 50 gravitational lensing 50 sunspot 49 moon Titan 49 infrared radiation 49 exoplanet 49 planets 49 brightness 49 auroras 49 galaxy clusters 49 spatial resolution 49 Astronomers 49 total solar eclipse 49 luminosity 49 habitable zone 49 supernovae 49 terrestrial planets 49 constellations 48 eyepiece 48 infrared 48 dwarf galaxies 48 comet 48 wavelengths 48 MODIS 48 comet nucleus 48 lunar eclipse 48 amateur astronomers 48 supernova 48 reddish 48 Pleiades 48 Very Large Telescope 48 Enceladus 48 supernova explosion 48 interstellar dust 47 telescope 47 optical microscope 47 THEMIS 47 optical telescope 47 adaptive optics 47 corona