A Bernel sphere derivative orbiting a far distant hypothetical planet. The variant has a habitation sphere radius of 4000metres, the donut shaped rings are agriculture and oxygen farm. The large cylindrical structure closest to the colony is the microgravity shipyard and dock platforms. The central spine terminates both ends with excess heat radiators and the bulge on the spine furthest from camera is the power plant. The large rotating structure surrounding the hab sphere is a mirror directing sunlight to the agri rings.

The colony currently houses the future planetary population whilst terraforming operations take place on planet. Only the terraformers and their attendant science teams are on the surface of the world.

Lightwave
Planet from the Celestia Motherlode, model by me.