Habitable Worlds

Two Califormed moons orbiting one another in the Sunatta System millions of light years away.
The cratered moon in the distance is not finished with the califorming process, while the close up world has already been finished.

Califorming is making a planet/moon which used to be dead habitable, it is often called terraforming by others.
These worlds are both very small, roughly the size of Murcury so their atmospheres are at risk of erosion, they all have a transparent invisible global dome built around them miles above their atmospheres.