Dapsilia

Although the planet is not as densely populated as Aerius itself, it has a number of cities and what could be considered proto-nations of cities that see themselves as aligned with one another.

Due to its distance from the sun, Dapsilia never developed its own plant or animal life beyond a bacterial level.  Its breathable atmosphere was simply fortune.  Dextroluma (among other species) have worked to genetically modify various plants from their homeworld to cope with Dapsilia's lower light levels - most of their plantlife originally came from the Eternal Depths, Lunaris, and the Obsidian Peaks.  Animals from those nations tend to do well on Dapsilia as well.

Dapsilia is one of the few bodies in the Selenophos system to naturally have water, although it is at a much smaller rate than Aerius.  There are no oceans, only small underground reservoirs.  There are efforts underway to create artificial lakes and rivers from ice asteroids, but such projects are slow-moving due to the risk asteroids can present.  Still, these projects have had enough of an impact that the planet has begun to have a water cycle, although it is still quite limited.

Dapsilia, unlike Aerius, possesses a large set of 'rings' around the planet.  While it has a similar quantity of moons to Aerius (three), and satellites (thousands), the formation of the satellites into rings is deeply unusual.  It is hypothesized to be because the planet has a higher gravity than Aerius, and may have been closer to the two planets believed to have collided to form Selenophos' planetary belt.