系外惑星 けいがいわくせい Meanings Noun exoplanet; extrasolar planet Kanji 系 system. Read as ケイ. 外 outside. Read as ガイ. 惑 bewilder. Read as ワク. 星 star. Read as セイ. Words containing 系外惑星 太陽系外惑星 (たいようけいがいわくせい) extrasolar planet Word lists Astronomy Jinuma: Japanese Dictionary · Word lists