资料来源 : pyDict

行星间的,太阳系内的

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Interplanetary \In`ter*plan"et*a*ry\, a.
   Between planets; as, interplanetary spaces. --Boyle.

资料来源 : WordNet®

interplanetary
     adj : between or among planets; "interplanetary travel"