SimilarityRank
a_black_hole 0.848 67425
supernova 0.709 47013
quasar 0.709 61018
dark_matter 0.707 32284
galaxy 0.692 7128
dark_energy 0.692 55834
nebula 0.685 48385
the_Milky_Way 0.649 65157
neutrino 0.647 41916
our_universe 0.633 66180
pulsar 0.633 56249
our_solar_system 0.619 82880
NGC_[number] 0.616 64522
exoplanet 0.612 88229
comet 0.609 16244
spacetime 0.604 96462
the_solar_wind 0.603 80824
galactic 0.599 60709
string_theory 0.593 85187
the_Big_Bang 0.593 46860
the_universe 0.586 5701
asteroid 0.586 19862
astrophysics 0.582 46058
cosmic_ray 0.580 60042
the_solar_system 0.579 21341