Apollo popularly (e.g., in literary criticism) represents harmony, order, and reason--characteristics contrasted by those of Dionysus?, god of wine, who popularly represents emotion and chaos. The contrast between the roles of these gods is reflected in the adjectives Apollonian and Dionysian. However, Greeks thought of the two qualities as complementary: the two gods are brothers, and when Apollo at winter left for Hyperborea? would leave the Delphi Oracle to Dionysus?.
See also Apollo program and Near-Earth asteroid.