Related by context. Frequent words. (Click for all words.) 55 cosmologists 55 WMAP 54 Einstein 52 Big Bang theory 50 cosmic microwave background 50 Herschel 50 astronomers 49 Johannes Kepler 49 Copernicus 49 NASA Chandra 49 redshift 48 telescope 47 Einstein theory 47 optical telescopes 47 Albert Einstein 47 exoplanets 47 supernova 47 Feynman 47 XMM Newton 46 HD #b [002] 46 WM Keck Observatory 46 Galileo Galilei 46 Tombaugh 46 astrophysicists 46 supernovae 46 Space Telescope 46 Eta Carinae 46 extrasolar planets 46 quasars 46 Hubble telescope 45 general relativity 45 Hubble Telescope 45 cosmological constant 45 quasar 45 cosmologist 45 IceCube 45 Linus Pauling 45 UB# [003] 45 gravitational lensing 45 supernovas 45 exoplanet 45 Isaac Newton 45 supernova explosion 45 Planck 44 Carl Sagan 44 Corot 44 Sedna 44 globular clusters 44 cosmological 44 Hubble 44 distant galaxies 44 interferometry 44 planet orbiting 44 adaptive optics 43 physicists 43 Halley Comet 43 Hubble Space Telescope 43 X ray Observatory 43 extrasolar planet 43 theoretical physicist 43 astronomer 43 Buckminster Fuller 43 distant galaxy 43 GRBs 43 Apollo astronauts 43 Francis Crick 43 galaxies 43 brown dwarfs 43 Kepler 42 optical telescope 42 elliptical galaxies 42 comet Wild 42 celestial bodies 42 supernova explosions 42 super Earths 42 Brahe 42 Saturn rings 42 cosmology 42 Orion Nebula 42 Spitzer Space Telescope 42 pulsars 42 Itokawa 42 pulsar 42 gamma ray burst 42 gravitational waves 42 Telescope 42 astronomy 42 Leibniz 42 Saturn moons 42 Milky Way Galaxy 42 Lowell Observatory 41 Dwight Eisenhower 41 spectroscopic 41 Iapetus 41 universe 41 Radio Astronomy Observatory 41 interferometer 41 brown dwarf 41 outer planets 41 cosmic rays 41 comet nucleus