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 and the Swan (Leonardo) Leda and the Swan (Leonardo) The story of Leda and the Swan was the subject of two compositions by Leonardo da Vinci from perhaps 1503–10. Neither survive as paintings by Leonardo, but there are a number of drawings for both by him, and copies in oils, especially of the second composition, where Leda stands. Leonardo began making studies in 1504 for a painting, apparently never executed, of Leda seated on the ground with her children. Three sketches of Leda by Leonardo exist: A completed copy of "Leda and her Children" by Giampietrino is kept at Staatliche Museen, Kassel (c.1520, oil