Etymology

Constructed from Latin: inter- +‎ stellar- +‎ planet and from Middle English planete, from Old English planēta ‎(“planet, chasuble”), from Latin planeta, planetes, from Ancient Greek πλανήτης ‎(planḗtēs) variant of πλάνης ‎(plánēs, “wanderer, planet”), from Ancient Greek πλανάω ‎(planáō, “wander about, stray”), of unknown origin. Perhaps from a Proto-Indo-European *pel- ‎(“to wander, roam”), cognate with Latin pālor ‎(“wander about, stray”), Old Norse flana ‎(“to rush about”), Norwegian flanta ‎(“to wander about”). More at flaunt.