Moon

From WoWWiki

Azeroth has two moons:

• The larger bright and silver moon, known as the White Lady, is worshipped as Elune by the night elves, and referred to as Mu'sha, the left eye of the Earthmother in the tauren myth Sorrow of the Earthmother.
• The smaller cool, blue-green moon is known as the Blue Child.

For some reason, the "Blue Child" is not visible in WoW, it once was but was removed from the game.

• Draenor and now Outland has the moon known as the Pale Lady.

Sources

• The prologue to The Last Guardian indicates two moons: The larger of the two moons had risen first this evening, and now hung pregnant and silver-white against a clear, star-dappled sky.
• The quest Of Love and Family refers to the twin moons of Azeroth.
• Lord of the Clans also makes several references to two moons.
• How to Win Friends also makes reference to the moons.