When Zeus had pity on Ixion and brought him to Olympus and introduced him to the gods, instead of being grateful, Ixion grew lustful for Hera. Zeus found out about his intentions and made a cloud in the shape of Hera, who was later named Nephele, and tricked Ixion into coupling with it and from their union came Centaurus. So Ixion was expelled from Olympus and Zeus ordered Hermes to bind Ixion to a winged fiery wheel that was always spinning. Therefore, Ixion was bound to a burning solar wheel for all eternity, at first spinning across the heavens, but in later myth transferred to Tartarus.