The fantasy author J. R. R. Tolkien of Middle-earth fame included Earth's sun and moon for the cosmology of his myths of Arda.
These astronomical bodies appear in various versions of The Silmarillion, a history of a world, called Middle-earth populated by Elves and other fantastic creatures as well as Men. A version of The Silmarillion, edited by the author's son and literary executor Christopher Tolkien, was posthumously published in 1977. However the Sun and Moon already appear in the author's writings dating from the 1920s.
The sun and moon in Tolkien's legendarium were described in the Narsilion, the "Song of the Sun and Moon".
The published Silmarillion states that the Sun was created by the Vala Aulë; he and his people made a vessel to hold the radiance of the last fruit of Laurelin. The vessel of the sun was guided by Arien, a Maia.
Names of the Sun amongst the Elves included Anar or The Fire-golden, a name given to it by the Vanyar; Anor, the common name for the Sun in Sindarin, as seen in Minas Anor (later Minas Tirith) and the Gondorian province of Anórien; and Vása, or Heart of Fire, a name given to the Sun by the Noldor.
A poetic name for the Sun was The Daystar, and Gollum referred to it as The Yellow Face.