planetary
UK: ˈplæn.ɪ.tər.i | US: ˈplæn.ə.ter.i
adj. relating to or resembling a planet
adj. involving or affecting an entire planet; global
n. (rare) a hypothetical or fictional inhabitant of a planet
The word "planetary" derives from the Late Latin planetarius, meaning "pertaining to a planet." The root "planet" originates from the Greek planētēs (πλανήτης), meaning "wanderer," as ancient astronomers observed planets moving differently from fixed stars. The suffix "-ary" (from Latin -arius) forms adjectives indicating relation or belonging. Thus, "planetary" literally means "related to wanderers (planets)," reflecting both astronomical and metaphorical global scales.
Planetary scientists study the geology of Mars and other celestial bodies.
Climate change is a planetary issue requiring international cooperation.
The telescope captured stunning images of planetary nebulae.
Sci-fi novels often depict conflicts between planetary civilizations.
Jupiter’s Great Red Spot is one of the most famous planetary features.