This is not a bug (at least for me), but something interest to see and that, in my opinion, should be fixed. Look at Earth when you're approaching to the Starbase or leaving it. It appears as a red crescent surrounded by the slave shield, and as is logical its illuminated side points toward the Sun. Now,look at other skave worlds: all of them look exactly like Earth, even being in different positions of their orbits; instead of a crescent, they'd look like a gibbous moon, for example, and their illuminated sides should point to their stars.