So, I wanted to do the full series of this in my pinkscale style, but I just haven’t had the energy lately so this is kind of a hodgepodge which will link back to a couple previous submissions. Pic 3) is the oldest of the bunch, and lacks a lot of detail I want to include next time: zero-gee cityscape hanging between the cylinders on cables, more varied architecture, graffiti and other art.

1. Exterior of the urban asteroid during heavy space traffic, showing Saturn ring-shaped cooling fin and sunlight focusing mirror.
2. LINK: Caverns between 0-10km below the surface. Centrifugal habitats cling between two boulders, while city sprawls overhead. Heat pipes in distance.
3. LINK: View into the central cavern, or ‘gravity balloon’. About 10km below the surface, the weight of rock in low gravity pressurizes a vast sphere of air.
4. LINK: Inside an individual urban “spindistrict” as seen in 2) and 3).