Related by context. Frequent words. (Click for all words.) 75 microlensing 68 gravitational lensing 66 extrasolar planets 66 extrasolar planet 64 exoplanets 63 exoplanet 63 rocky planets 62 habitable planets 62 OGLE 62 astronomers 61 astronomical observations 61 HD #b [002] 61 subatomic particle 61 COROT 61 XMM Newton 61 GRBs 61 Gliese #g 61 X ray emission 61 brown dwarfs 61 planets orbiting 61 globular clusters 61 magnetar 60 Spitzer Space Telescope 60 Cancri 60 planet orbiting 60 galaxy clusters 60 super Earths 60 gamma ray burst 59 gravitational wave 59 galaxy formation 59 neutrino 59 ESO Very Large Telescope 59 WM Keck Observatory 59 supernova explosion 59 NASA Chandra 59 occultation 59 astrophysicists 59 planet orbits 58 Gamma ray bursts 58 elliptical galaxies 58 globular cluster 58 distant galaxy 58 X ray Observatory 58 muon 58 supernovae 58 terrestrial planets 57 distant galaxies 57 spectroscopic 57 brown dwarf 57 Kuiper belt 57 interferometry 57 optical telescopes 57 WIMPs 57 adaptive optics 57 planets 57 Eta Carinae 57 astronomical objects 56 Very Large Telescope 56 quasars 56 substorms 56 muons 56 Saturn moons 56 Jupiter moons 56 Orion Nebula 56 gravitational waves 56 celestial object 56 HARPS 55 Raman spectroscopy 55 supernova remnant 55 pulsars 55 accretion disk 55 gamma ray bursts 55 gamma ray 55 Astronomers 55 dwarf galaxy 55 galaxy cluster 55 auroral 55 Milky Way galaxy 55 galaxies 55 supernova explosions 55 dynamical 55 hot Jupiters 55 quasar 55 Andromeda galaxy 55 cosmic microwave background 54 cosmic ray 54 Milky Way Galaxy 54 interstellar dust 54 neutron star 54 numerical simulations 54 infrared telescope 54 NASA Kepler 54 Earth magnetosphere 54 NASA Cassini spacecraft 54 Gliese 54 redshift 54 supernovas 54 Cassini Huygens 54 astrophysical 54 quantum entanglement 54 moon Charon