Cosmology (Q. "Ëagolmë") was the study of the structure, origin, and nature of the universe. It concerned itself with how the world came into being, what laws governed its course, and how its parts stood in relation to one another — from the stars and seas to the souls of living beings. In many traditions, cosmology embraced both the physical and the metaphysical, including the unseen, the divine, and the moral order that underlay existence.
In Arda, cosmology rested upon revealed truth. The universe, known as Eä — "the World that Is" — came into being through the Ainulindalë, the Music of the Ainur. This great song, made by the divine spirits under the guidance of the One, shaped the vision of all that was to be. When the One spoke the word "Eä", the vision took form and the universe began.
Within Eä, Arda was fashioned as the dwelling place of the Children. The Valar entered into Eä to fulfill the themes of the Music and to give shape to the world. Arda was not unchanging: it was marred by discord, altered by the works of the Valar, and contained both seen and unseen realms. Its cosmology encompassed not only the lands and seas, but also the Timeless Halls that lay beyond the world, the Void outside creation, and the dimensions of spirit that were woven through the physical.
Thus cosmology in Arda formed a whole of Music, matter, spirit, and fate — a vision of the world as both a realm of substance and a tale unfolding through time according to the will of the One.
Editorial Note: This entry contains speculative or fan-based material — such as fanon, fanfiction, or theory constructs — that may not be directly supported by canonical texts. Interpretations offered here are part of the NNCA’s speculative corpus and should not be mistaken for primary Tolkien sources.
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