I would think it might be possible that one could get the illusion of a ring at the periphery just because there's more material in the way at that point. But that means the ring would appear perpendicular to one's position, and I don't think that's what they've been depicting.
On 2002-04-03 07:33, Firefox wrote:
I found it interesting how the ring expanded from each Death Star differently (polar for DS1, equatorial for DS2.) I don't know what the mechanics would be, though I do know the first one was ~100 miles across, while DS2 was in the neighborhood of 550 miles in diameter, though not yet completed. Again, I don't know if that has anything to do with the ring waves.
Everything I need to know I learned through Googling.