I find the whole thing fishy. Emperors in the real world used to be declared divine after their deaths too. Some even while living, like in China or Japan. It's all b.s. though. It's not like anyone ever witnesses a celestial ceremony, where the other 8 crown Talos a divine. It's sound more like a well wishing created by mortals who admired the man. Or something they didn't quite understand, and jumped to conclusions, based on conjecture. He was definitely powerful, but maybe they jumped the gun in their confusion, trying to make sense of his power. He might have just been a powerful agent of divine powers. Think of the Silver Surfer - he was bestowed with the Power Cosmic, the same power Galactus, his creator, wielded. But he wasn't Galactus himself. He was like the "mini-me" of Galactus. lol. Maybe Talos is like that. Still immortal, still powerful, but not quite a supreme of the universe either.
Oh yes, I thought the exact same thing when I was first introduced to TES. 'Emperors becoming gods, yeah right, I smell bs'.
But you have to understand, this is not a mathematical, physical universe. TES takes place in a mythical universe, the kind our remote ancestors dreamed of before we invented things that told us what is what.
Belief is a very important factor in a mythical universe, the process of mythopoesis ensures that what people believe becomes reality, more or less, for one.
It is a geocentric universe with Nirn firmly at the middle and all the stars, planets and even the sun going around it. It is literally the centre of creation. The sun isnt even a glowing ball of gas its a literal hole in the sky to the realm of magic.
When coming into the TES universe you have to let your scientific mind go. Things do not work because of logic or reason or natural laws, blast, the natural laws themselves are dead gods.
It is a mythical universe, not a scientific one and the power of belief, the power of story is the most important thing.
When you examine the mythical construct as I have tried to explain in my previous posts you will see how important Talos is to 'the story' and that is all that matters, as 'the story' in a very real sense is reality.
The moons are the body of a dead god. A god that still meddles as 'even dead gods can dream'. All normal rules are off here, what counts is only what makes sense in our heart of hearts, in the emotional and subjective way we viewed the universe in the dream-time of our species.