Related by context. Frequent words. (Click for all words.) 73 cosmology 67 astrophysical 64 cosmic 63 general relativity 63 quantum mechanics 62 cosmologists 59 quantum theory 57 planetary 57 particle physics 56 multiverse 56 metaphysical 56 cosmic microwave background 56 Einstein theory 56 cosmos 56 epistemological 55 quasars 55 quantum physics 55 supernovae 55 Big Bang theory 55 dynamical 54 WMAP 53 singularity 53 ontological 53 galactic 53 galaxies 53 distant galaxies 53 supernovas 52 subatomic 52 universe 52 redshift 52 astrophysics 51 metaphysics 51 planets 51 astrophysicists 51 galaxy clusters 51 pulsars 50 relativistic 50 neutron stars 50 astronomers 50 physicists 50 interstellar 50 gravitational waves 50 astronomy 50 epistemology 49 quantum mechanical 49 celestial bodies 49 thermodynamic 49 gamma ray bursts 49 brown dwarfs 49 theoretical 49 celestial 48 relativity 48 neutrino 48 celestial objects 48 Higgs boson 48 cosmic ray 48 primordial 48 magnetic fields 48 spectroscopic 48 theism 48 dwarf galaxies 48 extrasolar planets 48 theorists 48 physics 47 Cosmology 47 galaxy 47 Uranus 47 quasar 47 supernova 47 evolutionary theory 47 epochs 47 thermodynamics 47 phenomena 47 supermassive black holes 47 particle accelerators 47 macroscopic 47 cosmic rays 47 Theoretical 46 Saturn rings 46 antimatter 46 Solar System 46 monotheistic 46 comets 46 neutron star 46 nebulae 46 temporal 46 wormholes 46 mathematical 46 distant galaxy 46 neutrinos 46 geometrical 46 theoreticians 46 exoplanet 45 theoretical physics 45 constellations 45 evolutionary biologists 45 gravitational 45 scalar 45 magnetosphere 45 humankind 45 astrological