Back كوكب هيليوم Arabic Planeta d'heli Catalan Planeta de helio Spanish سیاره هلیومی Persian Heliumplaneetta Finnish Planète d'hélium French כוכב לכת הליום HE Planet helium ID Pianeta di elio Italian ヘリウム惑星 Japanese
A helium planet is a planet with a helium-dominated atmosphere. This contrasts with ordinary gas giants such as Jupiter and Saturn, whose atmospheres consist primarily of hydrogen, with helium as a secondary component only. Helium planets might form in a variety of ways. Gliese 436 b is a possible helium planet.