In Greek mythology, Hesperos (Greek Ἓσπερος (The Evening Star), sometimes Latinized as Hesperus) was a son of Eos, by either Atlas, Astraios or Cephalus. His Roman equivalent was Vesper.

Variant Names

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Hesperus is the personification of the evening star, the planet Venus. His name is sometimes conflated with the names Eosphorus (Εώσφορος, "bringer of dawn"; Latin Aurora) or Phosphorus (Φώσφορος, "bringer of light", translated as Lux Ferre ( Lucifer ) in Latin) since they are all personifications of the same planet Venus.

When named thus by the ancient Greeks, it was thought that Phosphorus and Hesperus (Venus in the evening) were two different celestial objects. It was the Greek philosopher and mathematician Pythagoras who first realized that Phosphorus and Hesperus were the same object.

Phosphorus was the father of Ceyx, Daedalion and Leukone. He is also said to be the father of the Hesperides.

"Hesperus is Phosphorus"

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The terms "Hesperus" and "Phosphorus" and the sentence "Hesperus is Phosphorus." are of interest to language philosophers, see, e.g., "Proper name" article. The terms were used by Gottlob Frege to illustrate his idea of sense and reference. Saul Kripke used the sentence to demonstrate that the knowledge of something necessary (in this case an identity) is not always a priori matter, but could (and in some cases, necessarily) be something discoverable.

Hesperus in computer gaming

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Hesperus and Hesperus II are planets in the Mechwarrior universe. It is one of the most proliferous mech manufacturing planets in the Inner Sphere.

Owned first by The Lyran Commonwealth, followed by the Federated Commonwealth in 3040, and after 3057 was owned by the Lyran Alliance. In the early years, it was the site where the infamous Phoenix-Hawk LAM was manufactured.

Vesper is a town in the MMORPG Ultima Online

Vesper is the name of a MVP boss in Ragnarok Online.

Greek gods | Greek mythology | Venus

Eósforo | Éosphoros | Геспер