Ahh, but was it a mature question? ;-) Think of the absolutely enormous number of calculations required to track the orbit of each of the 400 or so billion stars, which not only orbit the centre of the galaxy, but move with respect to each other: oscillating up and down from the galactic plane, moving in and out of spiral arms; the complexity is extreme. All that work and effort for what? Something you wouldn't notice for 20,000 years? Hmmm...
On the other hand, the stars within a radius of, say, 50 LY of Sag* A actually move noticeably fast enough within a realistic gameplay timeframe. The closest ones take just days to orbit. They may have simulated that.
Well I tried to phrase it in a mature manner. I'm not sure there's any such thing as an immature question, but basically I was wondering just how far they took the simulation. I mean, we can expect the planets, their associated moons, and the stations to go about their routine orbits and revolutions, and to me that would seem to be a mind-boggling amount of calculations alone, and yet it happens, so Frontier is doing it and apparently came up with a way to solve the problem.
And I was just coming back here to point out that yeah, the stars closer to the galactic hub do move faster, and even perceptibly so, as I believe it's in studying their motion that led to the idea of there being a black hole at the center, but you beat me to it.
Anyway, as I said, it was just curiosity more than anything. I got a bit irritated earlier because I wasn't expecting to be ridiculed for curiosity. But it's really my fault, I suppose, for letting my guard down and forgetting that the internet is often bored and petty enough to ridicule strangers for no reason at all, a situation which is amplified considerably when even the slightest possibility for ridicule exists.