interplanetary

From inter- +‎ planetary.

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interplanetary (not comparable)

1. Existing or occurring between planets.

   Humans are just beginning to explore interplanetary travel.

   • 1873, Jules Verne, “Round the Moon: A Sequel to From the Earth to the Moon. Chapter III. Their Place of Shelter.”, in Louis Mercier [i.e., Lewis Page Mercier], Eleanor E[lizabeth] King, transl., From the Earth to the Moon, Direct in Ninety-seven Hours and Twenty Minutes: And a Trip Round It. […], New York, N.Y.: Scribner, Armstrong & Company, published 1874, →OCLC, page 170:

     "Come, Diana [a dog]," said he; "come, my girl! thou whose destiny will be marked in the cynegetic annals; […] thou who art rushing into interplanetary space, and wilt perhaps be the Eve of all Selenite dogs! come, Diana, come here."

   • 1956, Cyril Hume, Forbidden Planet, spoken by Cook:

     Him and me, we kind of got to toasting each others good health. Just for cordial interplanetary relations you understand.

   • 1976, “Calling Occupants of Interplanetary Craft”, in 3:47 EST, performed by Klaatu:

     Calling occupants of interplanetary craft / Calling occupants of interplanetary / Most extraordinary craft / We've been observing your Earth / And one night we'll make a contact with you

   • 1994, “Space Cowboy”, in The Return of the Space Cowboy, performed by Jamiroquai:

     This is the return of the space cowboy / Interplanetary good vibe zone

• interplanetary medium
• interplanetary space