SimilarityRank
space_exploration 0.798 37186
space_shuttle 0.656 81402
astronaut 0.654 16889
spaceship 0.649 40441
space_station 0.647 35861
outer_space 0.646 45198
space_technology 0.624 81020
on_the_moon 0.606 35559
space_science 0.605 69787
extraterrestrial 0.597 64799
spacecraft 0.593 12247
the_International_Space_Station 0.583 61329
science_fiction 0.575 13343
on_Mars 0.560 39049
into_space 0.559 54334
aeronautics 0.553 90068
sci-fi 0.552 35462
Star_Trek 0.550 27052
NASA 0.545 4997
the_solar_system 0.538 21341
SpaceX 0.536 64263
airship 0.536 59638
Martian 0.535 36404
robotic 0.530 7859
other_planet 0.529 72712