- Situated or travelling between planets: interplanetary missionsMore example sentences
- Fragments of asteroids and comets pervade interplanetary space.
- Orion was originally designed as an interplanetary spacecraft for missions to the Moon or Mars, but the design was adapted for interstellar travel.
- Its principal responsibilities are to support interplanetary spacecraft missions and radio and radar astronomy observations.
More definitions of interplanetaryDefinition of interplanetary in:
- The US English dictionary