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3 entries under expression topic. ×

1
cosmic exploration(space, exploration)
1
space colonization(space, exploration)
1
space exploration(space, exploration)
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APASmart Define. (1970). outer space exploration thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/outer_space_exploration/thesaurus/related
ChicagoSmart Define. 1970. "outer space exploration thesaurus" https://smartdefine.org/outer_space_exploration/thesaurus/related (accessed September 23, 2026).
HarvardSmart Define 1970, outer space exploration thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/outer_space_exploration/thesaurus/related>.
MLASmart Define. "outer space exploration thesaurus" 1 January 1970. Web. 23 September 2026. <https://smartdefine.org/outer_space_exploration/thesaurus/related>