The moon of Middle-earth was created by Aule. A vessel was made, by he and his people, to hold the radience of the last flower of Telperion, the elder of the Two Trees of Valinor. The Maia Tilion was chosen to guide the vessel of the Moon.

"Isil was first wrought and made ready, and first rose into the realm of the stars, and was the elder of the new lights, as was Telperion of the Trees."