the Tale of Libra
Eventually, however, these stars of Libra came to represent the Golden Chariot of Pluto. The story of Pluto's abduction of Persephone is a widely known Greek myth, perhaps because it has such a strong astronomical association.
Pluto's (or Hades') Golden Chariot was used whenever the Lord of the Underworld wished to visit the Upperworld, usually to seduce a nymph. But when he took Persephone back to Tartarus, the deepest part of Hades, the Upperworld would change forever.
The name of the ruler of the Underworld was actually Hades. Hades was a brother of Zeus and of Poseidon; he was usually ignorant of the happenings of the Upperworld, only emerging rarely from his dark kingdom.
Deep beneath the earth, he owned all its mineral riches, but his favourite possession was a gift from the Cyclopes: a helmet that rendered him invisible. (Those familiar with Wagner's Ring Cycle will recognise the leitmotif, and a number of others in this story of Persephone).
It was considered imprudent and dangerous to mention the names of certain gods and goddesses. Thus the Furies, or Cronies, were called Eumenides (Kindly Ones), and Hades was called Pluto (Rich One).
His golden chariot was pulled by four jet-black horses. While he used the chariot to periodically visit the Upperworld, in order to seduce a beautiful nymph, he rarely wished the relationship to last. Until he saw Persephone, the daughter of Demeter and Zeus.
Demeter was the sister of Zeus and Hades, and one of the most important of goddesses as she was responsible for Agriculture, and all growing things.
Hades is so enamoured by the beauty of Persephone, he wants her for his own, so takes her by force down to his kingdom, where she becomes the Queen of the Underworld.
Demeter mourns for her lost daughter and begs the other gods for help. So Theseus and Peiritheus (his brother) descend into Hades in search of Persephone, but are unsuccessful. In fact, they are held captive by Hades, and Heracles is sent to rescue them. He can only manage to bring back Theseus; Peiritheus is condemned to remain forever in Hades.
Demeter is so distraught about the loss of her daughter she decides to forbid any seeds from sprouting. A vast drought spreads throughout the Upperworld. Zeus becomes vexed, for he is owed a certain tribute, and if the drought continues his tribute will not be forthcoming.
Some accounts give Zeus a more noble reason for acting on his sister's behalf: that he empathizes with Demeter and wishes to rectify her loss. In any event, he convinces his brother Hades to give up Persephone, so that the Upperworld can again become green and lush.
Hades agrees, provides that Persephone hasn't eaten anything since her arrival. Alas, she had consumed six pomegranate seeds, so Hades claims she cannot return.
Zeus will have none of it, and rules that she must forever divide her time between the Upperworld and the Underworld; four months out of the year she must stay with her husband, while the rest of the year she may visit her mother, in the Upperworld.
Thus every year the world retreats briefly into a cold and forbidding place, until the 21st of March, when Persephone is allowed to emerge from the Underworld, bringing Spring with her."
Source: the Constellations