Hesperus was the personification of the Evening Star in Greek mythology, son of Eos, goddess of dawn, and Cephalus. His mother had another son by the star god Astraios, who was called Phosphorus or Eosphorus, meaning the Morning Star. What the Ancient Greeks considered as the Evening and the Morning Star, was in fact the planet Venus; initially they thought that the two stars were different celestial objects, but then accepted the Babylonian theory that they were one and the same. They then gave it the name Aphrodite (the Roman equivalent of Venus). Hesperus was the father of Ceyx, Daedalion, and according to some sources, the Hesperides.
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