Trope-a-Day (R): Alien Sky
Alien Sky: Well, yes. Particularly of note: Eliera’s weird not-a-horizon on account of being just flat enough; the cool accretion-disk effects of Mírlan, which has a pulsar in the same system; Revallá, which is a gas-giant moon and has that in the sky; Galáré’s planetary ring; the double planet system of Isshára-Léstára; and the giant boiling red suns of pretty much any planet in an MV-star’s system.
Also the junklight in virtually all long-inhabited planetary systems; the light reflecting from hundreds or thousands of years’ worth of satellites, habitats, and orbital platforms.