Related by context. Frequent words. (Click for all words.) 55 astronomer 55 supernovae 54 substorms 53 astronomers 53 cosmologists 53 supernova explosion 52 supernova 52 astrophysicist 52 GRBs 52 magnetar 52 gravitational lensing 51 Eta Carinae 51 astrophysicists 51 gamma ray bursts 51 galaxy clusters 51 planet orbiting 51 theoretical physicist 50 rocky planets 50 supernovas 50 elliptical galaxies 50 cosmic ray 50 Phil Plait 50 supernova explosions 49 neutron star 49 gamma ray burst 49 physicists 49 super Earths 49 astronomy 49 neutron stars 49 X ray Observatory 49 hot Jupiters 49 WIMPs 49 Palomar Observatory 49 NASA Chandra 49 neutrino 49 quasars 49 X ray emission 49 pulsars 49 extrasolar planets 48 Betelgeuse 48 planetary scientist 48 Astrophysics 48 Astronomy 48 globular clusters 48 Richard Feynman 48 HD #b [002] 48 astrophysics 48 astrophysical 48 COROT 48 cosmologist 48 particle physicist 48 XMM Newton 48 astrobiologist 48 cosmological 48 brown dwarfs 48 WM Keck Observatory 48 distant galaxy 47 Astronomers 47 Big Bang theory 47 dwarf galaxy 47 astronomical observations 47 Harvard Smithsonian 47 Astronomer 47 CMEs 47 terrestrial planets 47 planetary 47 quark gluon plasma 47 extrasolar planet 47 superfluidity 47 dwarf galaxies 47 Spitzer Space Telescope 47 Kavli Institute 47 supermoon 47 quantum gravity 47 planetary science 47 exoplanets 47 supermassive black holes 47 optical telescopes 46 galaxy cluster 46 exoplanet 46 Cosmology 46 redshift 46 planets 46 meteor showers 46 physicist 46 Geminids 46 galaxies 46 infrared telescope 46 Jupiter Saturn Uranus 46 Michael A'Hearn 46 ejecta 46 spacetime 46 gravitational waves 46 planets orbiting 46 meteor shower 45 cosmology 45 Cassini Huygens 45 Andromeda Galaxy 45 Einstein theory 45 gravitational wave 45 Caltech