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:''This page is about the Greek deity. For the airline, see Astraeus (airline). For the genus of earthstars, see Astraeus (genus).''
In Greek mythology, 'Astraeus' (other times spelled 'Astraeos') is an astrological deity and the Titan-god of the dusk. His original Greek name, 'Astraios' (Αστραιος), translates "dawn of the stars", the time when the stars come out, or simply dusk (lit. "stardawn": astra- meaning "stars"; the -eos portion meaning "dawn"). 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 referred to him as one of the Gigantes.
Appropriately, as god of the dusk, Astraeus married Eos, goddess of the dawn. Together as nightfall and daybreak they produced many children who are associated with what occurs in the sky during twilight. They had many sons, the four Anemoi ("Winds"): Boreas, Notus, Eurus, and Zephyrus, and the five Astra Planeta ("Wandering Stars", i.e. planets): Phainon (Saturn), Phaethon (Jupiter), Pyroeis (Mars), Eosphoros/Hesperos (Venus), and Stilbon (Mercury). A few sources mention one daughter, Astraea ("stars", fem. personification. Sometimes: "justice"), but most writers considered Astraea the child of Zeus and Themis.
He is sometimes associated with Aeolus, the Keeper of the Winds, since winds often swell up around dusk.