Moon and another attributes of the real Earth. Why?

[Vidu]

Dont you remember the last cutscene of the 3.0 story line- ascion and the warrior of darkness stand on the moon. It is gray, with craters (if I rememrer right). Looks like the real Earth's Moon. However, I dont understand how they stands in open space

2 or 3 moons? At least it will tells us, that we are in another world, different from ours

I do remember that last cutscene - but for me thats a bow towards FFIV where the whole moon buisness started