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...

, Hesperus (Greek

Greek language

Greek is an independent branch of the Indo-European family of languages. Native to the southern Balkans, it has the longest documented history of any Indo-European language, spanning 34 centuries of written records. Its writing system has been the Greek alphabet for the majority of its history;...

  Hesperos) is the Evening Star, the planet Venus

Venus

Venus is the second planet from the Sun, orbiting it every 224.7 Earth days. The planet is named after Venus, the Roman goddess of love and beauty. After the Moon, it is the brightest natural object in the night sky, reaching an apparent magnitude of −4.6, bright enough to cast shadows...

 in the evening. He is the son of the dawn goddess Eos

Eos

In Greek mythology, Eos is the Titan goddess of the dawn, who rose from her home at the edge of Oceanus, the ocean that surrounds the world, to herald her brother Helios, the Sun.- Greek literature :...

 (Roman

Roman mythology

Roman mythology is the body of traditional stories pertaining to ancient Rome's legendary origins and religious system, as represented in the literature and visual arts of the Romans...

 Aurora

Aurora (mythology)

Aurora is the Latin word for dawn, the goddess of dawn in Roman mythology and Latin poetry.Like Greek Eos and Rigvedic Ushas , Aurora continues the name of an earlier Indo-European dawn goddess, *Hausos....

) and is the brother of Eosphorus

Phosphorus (morning star)

Phosphorus , a name meaning "Light-Bringer", is the Morning Star, the planet Venus in its morning appearance. Φαοσφόρος and Φαεσφόρος are forms of the same name in some Greek dialects....

 (also called Phosphorus, and Lucifer

Lucifer

Traditionally, Lucifer is a name that in English generally refers to the devil or Satan before being cast from Heaven, although this is not the original meaning of the term. In Latin, from which the English word is derived, Lucifer means "light-bearer"...

), the Morning Star. Hesperus' Roman equivalent is Vesper (cf. "evening", "supper", "evening star", "west"). Hesperus' father was Cephalus

Cephalus

Cephalus is an Ancient Greek name, used both for the hero-figure in Greek mythology and carried as a theophoric name by historical persons. The word kephalos is Greek for "head", perhaps used here because Cephalus was the founding "head" of a great family that includes Odysseus...

, a mortal, while Eosphoros' was the star god Astraios

Astraeus

In Greek mythology, Astraeus or Astraeos was an astrological deity and the Titan-god of the dusk. In Hesiod's Theogony and in the Bibliotheca, Astraeus is a second-generation Titan, descended from Crius and Eurybia. However, Hyginus wrote that he was descended directly from Tartarus and Gaia, and...

.
Hesperus (Greek Hesperos) is the personification of the "evening star", the planet Venus

Venus

Venus is the second planet from the Sun, orbiting it every 224.7 Earth days. The planet is named after Venus, the Roman goddess of love and beauty. After the Moon, it is the brightest natural object in the night sky, reaching an apparent magnitude of −4.6, bright enough to cast shadows...

 in the evening.