Related by context. Frequent words. (Click for all words.) 60 X ray emission 59 visible wavelengths 59 rocky planets 57 magnetar 57 HD #b [002] 56 WIMPs 56 elliptical galaxies 56 Kuiper belt 56 spiral galaxies 55 dwarf galaxies 55 Gamma ray bursts 55 astronomical objects 55 brown dwarfs 55 aerosol particles 54 globular cluster 54 galaxy cluster 54 galaxy clusters 54 super Earths 54 gravitationally 53 fermions 53 supernova explosions 53 infrared wavelengths 53 silicates 53 olivine 53 Crab Nebula 53 atomic nuclei 53 galaxies 53 GRBs 53 habitable planets 53 quanta 53 spacetime 52 hot Jupiters 52 water vapor 52 redshift 52 dwarf galaxy 52 brown dwarf 52 extrasolar planets 52 accretion disk 52 GeV 52 radioactive decay 52 ejecta 52 universe 52 Gliese #g 51 earths 51 gravitational lensing 51 neutron star 51 Saturn rings 51 alpha particles 51 planets 51 Milky Way Galaxy 51 ionized gas 51 interstellar dust 51 Sedna 51 extrasolar planet 51 atoms 50 planet orbits 50 planet orbiting 50 Milky Way 50 bosons 50 Bose Einstein condensate 50 polar caps 50 comet nucleus 50 globular clusters 50 quark gluon plasma 50 muons 50 unaided eye 50 Enceladus 50 optical telescopes 50 supernovae 50 quasars 50 Earth magnetosphere 50 lavas 50 superfluid 50 astronomical observations 50 luminosity 50 terrestrial planets 50 Cancri 50 neutrons 50 radiative 50 cosmological constant 49 silicate 49 neutron stars 49 iron oxides 49 singularities 49 hydrogen atoms 49 subatomic particle 49 cosmologists 49 meteoroids 49 radiative forcing 49 subatomic 49 gamma rays 49 deuterium 49 gamma ray burst 49 Milky Way galaxy 49 quasar 49 atomic particles 49 anisotropy 49 Jupiter Saturn Uranus 48 nuclei 48 accreting 48 celestial object