 A few years after publishing "The Lord of the Rings", in a note associated with the unique narrative story "Athrabeth Finrod ah Andreth" (which is said to occur in Beleriand during the War of the Jewels), Tolkien equated Arda with the Solar System; because Arda by this point consisted of more than one heavenly body (Valinor being on another planet and the Sun and Moon being celestial objects in their own right and not objects orbiting the Earth).Tolkien developed a list of names and meanings called the "Qenya Lexicon".Christopher Tolkien included extracts from this in an appendix to "The Book of Lost Tales", including mentions of specific stars, planets, and constellations in the entries