Related by context. Frequent words. (Click for all words.) 58 Spitzer Space Telescope 57 planets orbiting 57 infrared telescope 56 extrasolar planets 56 exoplanets 55 optical telescopes 54 extrasolar planet 54 astronomers 53 NASA Chandra 53 telescopes 53 astronomical objects 53 astrophysicists 52 Hubble Telescope 52 distant galaxy 52 HD #b [002] 51 COROT 51 Chandra X ray 51 super Earths 51 NASA Kepler 51 Cassini Huygens 51 Very Large Telescope 50 planets 50 brown dwarfs 50 X ray Observatory 50 NASA Cassini spacecraft 50 XMM Newton 49 Milky Way galaxy 49 distant galaxies 49 Martian soil 49 rocky planets 49 Saturn rings 49 gravitational lensing 49 IceCube 49 meteorites 49 Andromeda Galaxy 49 supernova explosion 49 adaptive optics 49 Astronomers 49 Milky Way Galaxy 49 elliptical galaxies 49 scanning electron microscope 49 Saturn moons 48 exoplanet 48 cosmic microwave background 48 globular clusters 48 telescope 48 supernovae 48 orbiting spacecraft 48 cosmologists 48 supernovas 48 Orion Nebula 48 celestial objects 48 gravitational waves 48 optical microscope 48 asteroid 48 galaxy clusters 48 WMAP 48 satellites orbiting 47 galaxies 47 NASA Hubble Space 47 comets 47 Jupiter moons 47 cosmic dust 47 Asteroids 47 WM Keck Observatory 47 magnetar 47 orbiting 47 spacecrafts 47 computer simulations 47 quasars 47 comet dust 47 supernova remnant 47 Eta Carinae 47 comet nucleus 47 observatories 47 robotic spacecraft 47 infrared spectrometer 47 planet orbiting 46 spectrometers 46 Cassini spacecraft 46 dwarf galaxy 46 spacecraft 46 comet Wild 46 interstellar dust 46 GRBs 46 astronomical observations 46 infrared imaging 46 Mars Reconnaissance Orbiter 46 Einstein theory 46 ESO Very Large Telescope 46 infrared camera 46 terrestrial planets 46 hot Jupiters 46 meteorite 46 optical telescope 46 comet 46 flying saucer 46 Martian surface 46 dwarf galaxies 45 remote sensing satellites 45 supernova