In Various Cultures
The name Pollux refers specifically to Castor and Pollux, the sons of Leda. The star also bears Arabic name Al-Ras al-Tau'am al-Mu'akhar,(الرأس التؤام المؤخر), literally, 'The Head of the Second Twin.' Castor and Pollux together correspond to the Nakshatra Punarvasu in Hindu astronomy. The star is named Punartham in Malayalam.
Castor and Pollux are the two 'heavenly twin' stars giving the constellation Gemini (Latin, 'the twins') its name. The stars, however, are quite different in detail. Castor is a complex sextuple system of hot, bluish-white A-type stars and dim red dwarfs, while Pollux is a single, cooler yellow-orange giant.
In the catalogue of stars in the Calendarium of Al Achsasi Al Mouakket, this star was designated Muekher al Dzira, which was translated into Latin as Posterior Brachii, meaning the end in the paw.
In Chinese, 北河 (Běi Hé), meaning North River, refers to an asterism consisting of Pollux, ρ Geminorum and Castor. Consequently, Pollux itself is known as 北河三 (Běi Hé sān, English: the Third Star of North River.)
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