I've noticed that the textures and normals of the planet I'm orbiting is visible on the "Celestial sphere" texture. (its more noticable in-game)
Here's one that I almost missed, has anyone else noticed that the stars, constellation lines, and celestial sphere texture are not aligned? I've Highligted where Orion is on the celestial sphere texture, the constellation lines are below it, and the stars for it are in the opposite direction.
It appears that the celestial sphere texture is where it should be (12/21/2012 alignment makes this easy to check)