Related by context. Frequent words. (Click for all words.) 67 astronomers 66 gravitational lensing 65 extrasolar planets 65 extrasolar planet 64 XMM Newton 64 WM Keck Observatory 63 exoplanet 61 Spitzer Space Telescope 61 GRBs 61 planet orbiting 60 X ray emission 60 planets orbiting 60 NASA Chandra 60 ESO Very Large Telescope 60 gamma ray burst 60 spectroscopic 60 infrared telescope 60 optical telescopes 59 occultation 59 gamma ray bursts 59 HD #b [002] 59 exoplanets 59 galaxy cluster 58 adaptive optics 58 infrared wavelengths 58 X ray Observatory 58 globular clusters 57 astrophysicists 57 neutrino 57 supernovae 57 redshift 57 interferometry 57 telescopes 57 pulsars 57 Very Large Telescope 57 quasar 56 astronomical observations 56 brown dwarfs 56 cosmic ray 56 quasars 56 distant galaxies 56 THEMIS 56 galaxy clusters 55 elliptical galaxies 55 rocky planets 55 IceCube 55 dwarf galaxy 55 brown dwarf 55 terrestrial planets 55 supernova explosion 55 gravitational waves 55 astronomer 55 unaided eye 55 cosmic microwave background 55 Eta Carinae 54 interferometer 54 Orion Nebula 54 orbiting telescope 54 distant galaxy 54 LIGO 54 telescope 54 Astronomers 54 Jupiter moons 54 astrophysical 54 pulsar 54 WMAP 53 SDSS 53 Sedna 53 celestial objects 53 Raman spectroscopy 53 super Earths 53 auroras 53 optical telescope 53 JILA 53 observatories 52 Geminids 52 Gliese 52 amateur astronomers 52 supernova 52 Astrophysical Journal 52 planets 52 dynamical 52 neutron star 52 Telescope 52 asteroid 51 NASA Cassini spacecraft 51 Space Telescope 51 Lowell Observatory 51 ringed planet 51 geomagnetic 51 Earth asteroids 51 Spectrometer 50 orbiting 50 spectrometer 50 transmission electron microscope 50 optical microscope 50 isotopic 50 Higgs boson 50 Saturn rings 50 supernovas 50 galaxies