“But the flower and the fruit Yavanna gave to Aulë, and Manwë hallowed them, and Aulë and his people made vessels to hold them and preserve their radiance: as is said in the Narsilion, the Song of the Sun and Moon. These vessels the Valar gave to Varda, that they might become lamps of heaven, outshining the ancient stars, being nearer to Arda; and she gave them power to traverse the lower regions of Ilmen, and set them to voyage upon appointed courses above the girdle of the Earth from the West unto the East and to return.” - Of the Sun and the Moon and the Hiding of Valinor