Related by context. Frequent words. (Click for all words.) 48 cosmic microwave background 48 quasars 46 Einstein theory 46 magnetar 45 spacetime 45 distant galaxies 45 galaxies 45 neutron stars 44 supernovae 44 distant galaxy 44 WM Keck Observatory 44 neutron star 44 astrophysicists 44 astronomers 44 quantum gravity 43 gravitational waves 43 Astronomers 43 theoretical physicists 43 general relativity 42 cosmologists 42 gravitational lensing 42 quasar 42 quantum theory 42 astronomical observations 42 Kavli Institute 41 pulsars 41 GRBs 41 Harvard Smithsonian 41 superfluidity 41 HD #b [002] 41 astrophysical 41 cosmology 41 astronomer 41 infrared telescope 41 astrophysicist 41 particle physicist 41 palaeontologist 40 supernova explosions 40 optical telescope 40 gamma ray bursts 40 quantum mechanics 40 Palomar Observatory 40 IceCube 39 particle physicists 39 cosmologist 39 exoplanet 39 cosmological 39 blackness 39 planetary scientist 39 physicists 39 astronomical objects 38 gamma ray burst 38 gravitational wave 38 XMM Newton 38 paleoanthropologist 38 mathematician 38 COROT 37 astronomical observatory 37 astrophysics 37 relativistic 37 University Lamont Doherty 37 mathematicians 37 physicist 37 high temperature superconductivity 37 Paabo 36 particle physics 36 Lowell Observatory 36 supersymmetry 36 Max Planck Institute 36 biophysicist 36 Smithsonian Astrophysical Observatory 36 whiteness 36 Professor Hawking 36 positron 36 astrobiologist 35 theoretical physicist 35 scientists 35 telescopes 35 celestial object 35 interstellar dust 35 NASA Goddard 35 WMAP 35 telescope 35 Richard Feynman 35 primordial 35 Hawking 34 auroras 34 geological sciences 34 JILA 34 singularity 34 postdoc 34 Astrophysical Journal 34 Physicists 34 cosmos 34 Astrophysical Journal Letters 34 astrobiology 34 evolutionary psychologist 34 Physicist 34 Astrophysics 34 neutrino 33 Space Telescope