planetary
adjective /ˈplænətri/
/ˈplænəteri/
[only before noun] (specialist)- relating to a planet or planets
- planetary activity
- a planetary system
Oxford Collocations DictionaryPlanetary is used with these nouns:- mission
- orbit
Word Originlate 16th cent.: from late Latin planetarius ‘relating to the planets’ (recorded only as a noun meaning ‘astrologer’), from planeta ‘planet’.