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In Greek mythology, Actis (Ancient Greek: Ἀκτίς) was one of the Heliadae, a son of Rhodos and Helios. Actis, along with his brothers, Triopas, Macar and Candalus, were jealous of a fifth brother, Tenages's, skill at science. They killed him and Actis escaped to Egypt.[1] According to Diodorus Siculus, Actis built the city of Heliopolis in Egypt to honour his father Helios. It was from him that the Egyptians learned astrology.[2]


  1. ^ "Heliadae". (in German). Zenodot Verlagsgesellschaft. Retrieved 2008-10-19.
  2. ^ Diodorus Siculus, Bibliotheca historica 5.57