Yeah... I think I understand what you\'re seeing. You\'re complaining that the sun moves in a circle around the player, causing light to shine from a different angle, right? Okay, let me explain why this happens.
Simulating the rotation of planets around a solar system seems pretty simple. And it would be, if the planets themselves actually moved from one sector to another. However, they stay in the same sector, I assume this is for optomization, as the game might have trouble calculating the movements of that many blocks. Now, why don\'t the sectors rotate? Well, mainly because there are multiple solar systems, space in-between the solar systems, and the sectors are numbered. This means that, to really rotate the sectors themselves, the sectors would be completely out of order as some move in one direction, some in others, and some don\'t move at all.
The solution to this: The sectors rotate. Quite seriously, every sector just turns in place (I believe this is also the cause for the glitches moving from one sector to another, but I can\'t prove that yet). This gives a vague impression of rotation around a star, as well as simulating the day-night cycle for planets. Is it more than a little strange? Yes. But I assume it\'s necessary.
If that\'s not the day night cycle you\'re talking about, then please explain what I\'m missing.