But it's on the inside surface of an inifnitely large spherical plane.
"Because they are on the inside of a sphere, all stars are equidistant from Nirn"
The size of the sphere has nothing to do with the mobility of the items said to be "on" it. Equidistant means all the stars are at the same distance from Nirn, which is yet another way of saying they are on a sphere. How large this distance is is anyone's guess. In real life astronomy you take this distance to be 1.
But they are not actually on the inside surface of a sphere, the sphere is only in your mind because you can't comprehend the infinity. Who knows, maybe they are not moving at all and the movement is also only in your mind.
A valid point and one I expect to be the conclusion of this exercise.
I wonder how they determine under which constellation are they born? Do you thing that the constellation are along the ecliptic? Or does it work differently? Is it possible to see the constellation on the sky in any of TES games?
In real life astrology the constellation of your birth is the one which appears on the eastern horizon at the moment of your birth. It would work the same way in TES. The constellations should be located on the apparent annual path of the Sun; whether you call this path equator or ecliptic depends on the tilt of Nirn, another thing we can only guess at, though I think guessing the tilt of Nirn would be going a bit too far.
Yes, you can see the constellations on the night sky of Morrowind and Oblivion. If the devs did their homework, the Lady should be just above the eastern horizon at the time you get out of the prison in Oblivion.
DarkRalen, space is infinite in real world and that's why you think you see sphere with stars at night, but that doesn't need to be a case in TES
No. In real life you think the stars are on a sphere (in other words, that they are all equally distant) because they are too far for you to notice the difference between the distances of any two. The space in TES is definitely infinite, so says the lore.