Ok so an unsuspecting Deleted Scene… Actually this scrolling Planet Surface is Used for Approaching the Death Star in the Film but the Planet has been inverted in Color and Rotated 180 degrees…

If you look at the planet scrolling Surface once we See the X-wings Heading Towards Camera the Correct Scrolling Surface is Used for the Orange Planet Yavin. Instead of Reversing the Scrolling Texture they Decided to use this Scroll instead perhaps because it was rotating in the right direction for the effect of passing the planet.

It was Actually created for the Alderaan part of the film.

So How does it Work?

Ok the orierntation is correct in the Image the Planet Scrolls toward the Horizon… The Star Field Moves left to Right and the Death Star can Move and pivot as a footage Matte or 2D image element.

This would create a 3D effect using 2D elements so as to simulate the Death Star in Orbit.

This would Mean that That when seeing Alderaan out the View screen on The Death Star it would have been either Stationary (Most Likely) or come in from the left to the center of the screen. Had this scene been included Alderaan would have been stationary on the Death Star Viewscreen is my Gut feeling.