User blog comment:High King Ithilion/The Ithilion Eleruth Collection/@comment-30079501-20170323185632/@comment-25841881-20170325034345

The later the text the more canon is not agreed upon. And I am understanding you, the two were analogous. Analogous is not always equal, though.. And the only function they are known to perform is lighting and heating the world, which is done by an entirely separate radiation than the solar wind, which causes Aurorae. If we go by earlier writings of Tolkien, they might exist via handwaving.. And if we go by later documents, he tends to get more realistic and loses much fantastic appeal.. If we go by the solar system version, sure Aurorae could exist. If we go by his other late writings, then it'd be doubtful, as the mechanics for the creation of Aurorae did not exist.