Related by context. Frequent words. (Click for all words.) 73 microlensing 68 XMM Newton 64 extrasolar planets 63 OGLE 63 COROT 63 GRBs 63 planets orbiting 61 optical telescopes 60 astronomers 60 gravitational lensing 60 gamma ray burst 60 globular clusters 60 extrasolar planet 60 NICMOS 59 X ray emission 59 exoplanets 59 GRB # 59 astronomical observations 59 Spitzer Space Telescope 59 galaxy cluster 59 magnetar 58 astronomical objects 58 Pan STARRS 58 ESO Very Large Telescope 58 planet orbits 58 gamma ray bursts 58 galaxy clusters 58 infrared wavelengths 57 dwarf galaxy 57 planet orbiting 57 redshift 57 elliptical galaxies 57 visible wavelengths 57 brown dwarfs 57 spectroscopic 56 distant galaxies 56 occultation 56 Cancri 56 X ray Observatory 56 NASA Chandra 56 distant galaxy 56 supernovae 56 muons 56 habitable planets 56 unaided eye 56 super Earths 56 supernova remnant 56 quasars 55 Eta Carinae 55 auroral 55 dwarf galaxies 55 Gamma ray bursts 55 Andromeda galaxy 55 supernova explosion 55 Andromeda Galaxy 55 celestial object 55 NASA Cassini spacecraft 55 gravitational wave 55 HD #b [002] 55 moon Charon 55 cosmic microwave background 55 Saturn rings 55 meteoroid 54 supernova remnants 54 pulsars 54 Very Large Telescope 54 WIMPs 54 globular cluster 54 Fomalhaut 54 MARSIS 54 NASA ESA Hubble 54 spiral galaxies 54 spectra 54 interferometry 54 NASA Kepler 54 Voyager spacecraft 54 THEMIS 54 exoplanet 54 ecliptic 54 Orion Nebula 53 brown dwarf 53 interplanetary spacecraft 53 rocky planets 53 accretion disk 53 Global Surveyor 53 infrared telescope 53 celestial bodies 53 WMAP 53 astrophysicists 53 interferometer 53 Large Magellanic Cloud 53 IceCube 53 comet nucleus 53 Envisat 53 terrestrial planets 53 galaxies 53 Astronomers 53 Gliese #g 52 celestial objects 52 Milky Way Galaxy 52 NEOs