Related by context. Frequent words. (Click for all words.) 51 Figer 49 CfA 49 Carilli 48 Type Ia supernovae 48 planetary nebulae 48 astrophysical 48 astrophysicists 47 supernovae 47 extrasolar planets 47 globular clusters 47 Bahcall 47 supernova remnants 47 planets circling 47 Planck 47 habitable planets 47 Edwin Hubble 47 Galaxy Evolution 47 Astrophysicist 47 Gehrels 46 brown dwarfs 46 microlensing 46 magnetars 46 galaxy formation 46 COROT 46 quasars 46 GRBs 46 terrestrial planets 45 Gamma ray bursts 45 A'Hearn 45 Schulten 45 Hubble observations 45 astronomers 45 distant galaxies 45 planets 45 WMAP 45 magnetar 45 astronomical observations 44 exoplanets 44 active galactic nuclei 44 supernova explosions 44 supernova 44 Udry 44 supernovas 44 Cancri 44 solar corona 44 dynamical 44 radial velocity 44 astronomer 44 Johannes Kepler 44 Jupiter moons 44 hot Jupiters 44 gamma ray bursts 44 supernova explosion 44 Kepler 43 Cassini Huygens 43 quasar 43 redshifts 43 elliptical galaxies 43 XMM Newton 43 extrasolar planet 43 astronomical objects 43 COBE 43 habitable zones 43 astrophysics 43 atmospheric chemistry 43 X ray emission 43 SDSS 43 planetary 43 planets orbiting 42 astrobiologists 42 galaxies 42 HD #b [002] 42 auroral 42 rocky planets 42 theoretical physicists 42 physicists 42 Herschel 42 Astrophysicists 42 exoplanet 42 Keck Observatory 42 Orion Nebula 42 solar nebula 42 planetary scientist 42 numerical simulations 42 neutron stars 42 Borucki 42 supermassive black holes 42 super Earths 41 cosmic microwave background 41 astrophysicist 41 planetary science 41 Saturn moons 41 Melosh 41 planet orbiting 41 Caltech 41 Astronomy 41 brown dwarf 41 comets 41 Nicolaus Copernicus 41 Milky Way Galaxy 41 gravitational lensing