In Greek mythology

Greek mythology

Greek mythology is the body of myths and legends belonging to the ancient Greeks, concerning their gods and heroes, the nature of the world, and the origins and significance of their own cult and ritual practices. They were a part of religion in ancient Greece...

, Actis was one of the Heliadae

Heliadae

In Greek mythology, the Heliadae were the seven sons of Helios and Rhode, brothers to Electryone. They were Ochimus, Cercaphus, Macareus or Macar, Actis, Tenages, Triopas, and Candalus...

, a son of Rhodos  and Helios

Helios

Helios was the personification of the Sun in Greek mythology. Homer often calls him simply Titan or Hyperion, while Hesiod and the Homeric Hymn separate him as a son of the Titans Hyperion and Theia or Euryphaessa and brother of the goddesses Selene, the moon, and Eos, the dawn...

. Actis, along with his brothers, Triopas

Triopas

In Greek mythology, Triopas, Triophas or Triops was the name of several characters, whose relations are unclear. He belonged to the house of Phoroneus....

, Macar

Macareus (son of Helios)

In Greek mythology, Macareus was one of the Heliadae, sons of Helios and Rhodos. Macareus and his brothers, Triopas, Actis and Candalus, were jealous of a fifth brother, Tenages's, skill at science, so they killed him and had to escape from Rhodes upon discovery of their crime...

 and Candalus

Candalus

In Greek mythology, Candalus was one of the Heliadae, a son of Rhodos and Helios. Candalus, along with his brothers, Triopas, Macar and Actis, were jealous of a fifth brother, Tenages's, skill at science. They killed him and Candalus escaped to Cos....

, were jealous of a fifth brother, Tenages

Tenages

In Greek mythology, Tenages was one of the Heliadae, a son of Rhodos and Helios. He was murdered by his brothers, Actis, Triopas, Macar and Candalus, who were jealous of Tenages's skill at science....

's, skill at science. They killed him and Actis escaped to Egypt

Egypt

Egypt , officially the Arab Republic of Egypt, Arabic: , is a country mainly in North Africa, with the Sinai Peninsula forming a land bridge in Southwest Asia. Egypt is thus a transcontinental country, and a major power in Africa, the Mediterranean Basin, the Middle East and the Muslim world...

. According to Diodorus Siculus

Diodorus Siculus

Diodorus Siculus was a Greek historian who flourished between 60 and 30 BC. According to Diodorus' own work, he was born at Agyrium in Sicily . With one exception, antiquity affords no further information about Diodorus' life and doings beyond what is to be found in his own work, Bibliotheca...

, Actis built the city of Heliopolis

Heliopolis (ancient)

Heliopolis was one of the oldest cities of ancient Egypt, the capital of the 13th Lower Egyptian nome that was located five miles east of the Nile to the north of the apex of the Nile Delta...

 in Egypt to honour his father Helios. It was from him that the Egyptians learned astrology

Astrology

Astrology consists of a number of belief systems which hold that there is a relationship between astronomical phenomena and events in the human world...

.