Hi, just some ideias to consider...
The sun doesnt set, at this time this is a fact in MD land.
However this doesnt necessarily mean the sun stopped moving. The truth is it could have always been still.
Now if the planet that MD land is on stopped rotating on itself day and night would freeze. One side of the planet would always be day and the other night. If MD land was on the side that it always day, night would never come. If we measured the distance from some places in MD land to the sun (if the planet is round) some distances would be the same and some would be diferent considering a curved surface of the planet.
We would still have seasons because the planet would still move around the sun but no day and night cycle.
Not seeing the moon is a diferent matter. If in the MD planet we need night to be able to see the moon, then having a constant day would make it impossible to see. Another option is of course the pillars might also control the moon's rotation around the planet. If this was the case then the moon could be "stuck" on the night side of the planet, and we would not be able to see it.
All this depends on a few things:we need a ball shaped planet, MD planet is big enough to make MD land stay on its day side, the planet moves around the sun, the planet moves around it self, the moon moves around the planet.
thanks for reading,