Castor (star) in their spectra, and all are flare stars. "α Geminorum" (Latinised to "Alpha Geminorum") is the star system's Bayer designation. Castor and Pollux are the two "heavenly twin" stars that give the constellation Gemini (meaning "twins" in Latin) its name. The name "Castor" refers specifically to Castor, one of the twin sons of Zeus and Leda in Greek and Roman mythology. The star was annotated by the Arabic description "Al-Ras al-Taum al-Muqadim", which translates as "the head of the foremost twin." In the catalogue of stars in the "Calendarium of Al Achsasi Al Mouakket", this star was designated "Aoul al
Leda (river) Leda (river) The Leda is a river in north-western Germany in the state of Lower Saxony. It is a right tributary of the Ems and originates at the confluence of the Sagter Ems and the Dreyschloot (a branch of the Soeste) near the town of Barßel. The Leda flows into the Ems near the town of Leer. On the southern bank of the Leda, in the "Overledingen Land" (Overledingen="country over the Leda"), opposite Leer, lies the small settlement of Kloster Muhde ("Muhde" from the Old Frisian "mutha" meaning "(river) mouth"). The total length of the river is ( including the