Jupiter (mythology) practice of swearing by Jove to witness an oath in law courts is the origin of the expression "by Jove!"—archaic, but still in use. The name of the god was also adopted as the name of the planet Jupiter; the adjective "jovial" originally described those born under the planet of Jupiter (reputed to be jolly, optimistic, and buoyant in temperament). Jove was the original namesake of Latin forms of the weekday now known in English as Thursday (originally called "Iovis Dies" in Latin). These became "jeudi" in French, "jueves" in Spanish, "joi" in Romanian, "giovedì" in Italian, "dijous" in Catalan,
Amalthea (mythology) or inscription to join the two. Hyginus describes this catasterism in the "Poetic Astronomy", in speaking of Auriga, the Charioteer: <poem>Parmeniscus says that a certain Melisseus was king in Crete, and to his daughters Jove was brought to nurse. Since they did not have milk, they furnished him a she-goat, Amaltheia by name, who is said to have reared him. She often bore twin kids, and at the very time that Jove was brought to her to nurse, had borne a pair. And so because of the kindness of the mother, the kids, too were placed among the constellations. Cleostratus