Related by context. Frequent words. (Click for all words.) 60 microlensing 60 extrasolar planet 59 XMM Newton 59 GRBs 59 extrasolar planets 58 gamma ray burst 57 Galaxy Evolution 57 magnetic reconnection 57 solar corona 57 infrared wavelengths 57 X ray emission 56 OGLE 56 NICMOS 56 distant galaxies 56 habitable planets 55 exoplanets 55 brown dwarfs 55 planets orbiting 55 globular clusters 55 Mauna Kea Hawaii 55 planetary nebulae 54 active galactic nuclei 54 terrestrial planets 54 infrared radiation 54 gamma ray bursts 54 redshifts 54 WIMPs 54 infrared spectroscopy 54 exoplanet 54 Astrophysicists 53 gravitational wave 53 gravitational lensing 53 spectroscopic 53 COROT 53 hot Jupiters 53 astronomical objects 53 super Earths 53 cosmic rays 53 rocky planets 53 substorms 53 NASA Cassini 52 Gamma ray bursts 52 redshift 52 auroral 52 galaxy clusters 52 Mimas 52 globular cluster 52 celestial object 52 HD #b [002] 52 Earth asteroids 52 quasar 52 NASA Chandra 52 Earth magnetosphere 52 planet orbiting 52 dwarf galaxies 52 supernovae 52 dwarf galaxy 52 optical telescopes 52 geomagnetic storms 52 quasars 51 astrophysical 51 Sunspots 51 Terahertz 51 solar flares 51 gravitational waves 51 supernova remnant 51 astronomers 51 GRB # 51 Fluorescence 51 cosmic ray 51 CfA 51 planet orbits 51 magnetar 51 WM Keck Observatory 51 orbiting planets 51 Enceladus 51 Type Ia supernovae 51 Pan STARRS 51 ejecta 51 Hubble observations 51 LIGO 50 ESO Very Large Telescope 50 brown dwarf 50 Spitzer Space Telescope 50 Higgs particle 50 hydrothermal vent 50 supernova explosions 50 Fomalhaut 50 Cosmic rays 50 pulsars 50 accretion disk 50 Sedna 50 planets circling 50 geomagnetic 50 Astrophysical Journal Letters 50 galaxies 50 habitable zones 50 planets 50 gamma ray 50 distant galaxy 50 FRET