The icy gas giants of the outter solar system represent some of the less explored worlds of the solar system, the last and only close look of them still belonging to the 1977 Voyager 2 spacecraft.
Yet these worlds are not barren, much like their larger counterparts, they too have systems of moons around which represent significant terrestrial targets for future exploration, or expansion. Uranus in particular has over 20 moons. Most of them are small, "asteroid sized" bodies, however 5 of them are quite significant in size, this set presenting them to scale to each other. A globe of the Earth's Moon can also be added so as to provide an additional size refference point.
Even so not only we know little of them, but in fact they have hardly ever been mapped since only a few and partially lit snaps of them were returned by Voyager. Where there is no data the globes use a blank uniform colour in spirit with the object's overall colouration.