Leda (mythology) and by him, mother of Helen of Troy, Clytemnestra, and Castor and Pollux (also spelled "Castor and Polydeuces"). Leda also had other daughters by Tyndareus: Timandra, Phoebe, and Philonoe. Leda was admired by Zeus, who seduced her in the guise of a swan. As a swan, Zeus fell into her arms for protection from a pursuing eagle. Their consummation, on the same night as Leda lay with her husband Tyndareus, resulted in two eggs from which hatched Helen (later known as the beautiful "Helen of Troy"), Clytemnestra, and Castor and Pollux (also known as the Dioscuri). Which children are the
Bayer designation magnitude (those between magnitudes 1.51 and 2.5), labeling them from "gamma" through "zeta" in "top-down" (north-to-south) order. The "First to Rise in the East" order is used in a number of instances. Castor and Pollux of Gemini may be an example of this: Pollux is brighter than Castor, but the latter rises earlier and was assigned "alpha". In this case, Bayer may also have been influenced by the traditional order of the mythological names "Castor and Pollux": Castor is generally named first whenever the twins are mentioned. Although the brightest star in Draco is Eltanin (Gamma Draconis), Thuban was assigned