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See more synonyms for extraplanetary on Thesaurus.com
  1. existing or occurring in outer space beyond a planet, especially away from the planet Earth.
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Origin of extraplanetary

First recorded in 1865–70; extra- + planetary
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for extraplanetary

Historical Examples

  • Not necessarily, but it seems our iron-age man is fairly well informed in extraplanetary affairs.

    Blessed Are the Meek

    G.C. Edmondson