Lady Luck, the Santa Claus planet, the Great Beneficent, are some nicknames attributed to Jupiter (or Jove), named for the king of the Roman gods, a sky god of justice and generosity. More than likely the planet's own size allows it to stand for expansion and largesse. Jupiter rules Sagittarius (November 23-December 21) that best exemplifies the qualities of optimism and enthusiasm that help account for the good luck that comes its way. Sports and hunting, gambling, too, are associated with the centaur; so are higher education, long-distance travel and foreign-lands, law and the courts, and philosophy and religion. Jupiter usually spends a year within a sign and it portends expansiveness--including weight gain--success, and good cheer.