User blog comment:Stormulation/Future Skyrim DLC disscusion/@comment-4646508-20111201071011/@comment-1687311-20111201225511

The moons are a possibility. the book Lunar Lorkhan states the two moons are just Lorkhans decaying body, which points back to the heart of Lorkhan which Kagrenac struck using Keening and Sunder and their disappearance shortly thereafter.