We've now been shown concrete evidence of a means to artificially control Masser and Secunda's position in the sky.
This immediately led me to the Void Nights, a 2 year period in the 4th Era between 4E98 and 4E100, in which the Moons mysteriously vanished from the sky. Nothing in the Lore was known about what happened to the Moons, only that after two years they reappeared again and credit for that was taken by the Altmer using "Ancient Magic", thus securing Elsweyr into the 3rd Dominion.
Now we have a new theory to explain the Void Nights which is backed up by concrete evidence. The Shadow Dance Temple is an Adeptorium buried underground and stricken from the Khajiiti Histories. It goes to reason that barely anyone at all in the 4th Era would know of it's existence, so a Thalmor Expedition to it would give the Altmer unobstructed access to a device that directly controls the Moons. And the Khajiiti people would be oblivious.
CP2,000 Master Explorer -
AvA One Star General -
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The ClanQuest Objective: OMG Go Talk To That Kitty!