When Eris devised her instrument of discord against the marriage of Peleus and Thetis, she had to choose between different materials associated with the planets: mercury, iron, gold, copper and silver.
Each of the five apples grew in different places; as we already know, the golden apple came from the Garden of the Hesperides; Eris' choice was to consecrate the Sun, the most beautiful star, to maximize the discord between the suitors.
In this allegory we see the exact moment of the election.