Orion is mentioned in the oldest surviving works of Greek literature, which probably date back to the 7th or 8th century BC, but which are the products of an oral tradition with origins several centuries earlier. In Homer's Iliad Orion is described as a constellation, and the star Sirius is mentioned as his dog. In the Odyssey, Odysseus sees him hunting in the underworld with a bronze club, a great slayer of animals; he is also mentioned as a constellation, as the lover of the Goddess Dawn, as slain by Artemis, and as the most handsome of the earthborn. In the Works and Days of Hesiod, Orion is also a constellation, one whose rising and setting with the sun is used to reckon the year.
Daniel Seiter's 1685 painting of Diana over Orion's corpse, before he is placed in the heavens
The legend of Orion was first told in full in a lost work by Hesiod, probably the Astronomia; simple references to Hesiod will refer to this, unless otherwise stated. This version is known through the work of a Hellenistic author on the constellations; he gives a fairly long summary of Hesiod's discourse on Orion.
According to this version, Orion was likely the son of the sea-god Poseidon and Euryale, daughter of Minos, King of Crete. Orion could walk on the waves because of his father; he walked to the island of Chios where he got drunk and attacked Merope, daughter of Oenopion, the ruler there. In vengeance, Oenopion blinded Orion and drove him away. Orion stumbled to Lemnos where Hephaestus — the lame smith-god — had his forge. Hephaestus told his servant, Cedalion, to guide Orion to the uttermost East where Helios, the Sun, healed him; Orion carried Cedalion around on his shoulders. Orion returned to Chios to punish Oenopion, but the king hid away underground and escaped Orion's wrath. Orion's next journey took him to Crete where he hunted with the goddess Artemis and her mother Leto, and in the course of the hunt, threatened to kill every beast on Earth. Mother Earth objected and sent a giant scorpion to kill Orion. The creature succeeded, and after his death, the goddesses asked Zeus to place Orion among the constellations. Zeus consented and, as a memorial to the hero's death, added the Scorpion to the heavens as well.