Related by context. Frequent words. (Click for all words.) 66 XMM Newton 64 extrasolar planets 64 planets orbiting 64 exoplanet 63 extrasolar planet 63 GRBs 62 HD #b [002] 62 exoplanets 61 planet orbiting 61 occultation 61 gravitational lensing 60 astronomers 60 spectroscopic 60 globular clusters 60 elliptical galaxies 60 planets 59 distant galaxies 59 neutrino 59 brown dwarfs 59 quasars 59 rocky planets 59 redshift 58 interferometry 58 terrestrial planets 58 pulsar 58 Eta Carinae 58 distant galaxy 58 supernovae 58 brown dwarf 58 galaxy clusters 58 Very Large Telescope 58 interferometer 57 gravitational waves 57 cosmic ray 57 quasar 57 neutron star 56 Milky Way Galaxy 56 orbits 56 supernova explosion 56 WM Keck Observatory 56 NASA Cassini spacecraft 56 gamma ray burst 56 galaxy cluster 56 dynamical 56 Spitzer Space Telescope 56 Milky Way galaxy 56 cosmic microwave background 56 gamma ray bursts 56 astrophysical 56 WMAP 55 pulsars 55 celestial bodies 55 supermassive black hole 55 infrared wavelengths 55 dwarf galaxies 55 optical telescopes 55 Kepler 55 Astronomers 55 supernovas 55 comet 54 galaxies 54 Saturn moons 54 Sedna 54 orbiting 54 geomagnetic 54 X ray Observatory 54 astrophysicists 54 interstellar dust 54 comet nucleus 54 Saturn rings 54 abundances 54 gamma ray 53 unaided eye 53 NASA Chandra 53 adaptive optics 53 spectrometer 53 neutrinos 53 planetary 53 spectra 53 celestial objects 53 magnetic fields 53 Cassini spacecraft 53 general relativity 52 Enceladus 52 supermassive black holes 52 spiral galaxies 52 neutron stars 52 THEMIS 52 fainter 52 interstellar medium 52 Earth asteroids 52 ionosphere 52 telescopes 52 Alpha Centauri 52 ringed planet 52 asteroid 52 IceCube 52 spacetime 52 telescope 52 Planck 52 spectroscopy