Fomalhaut

A dim and waning star 25 light years from Sol, Fomalhaut is orbited by six planets of variable sizes. Four of the six are dead slabs of rock and ice, and Fomalhaut-II is a world of eternal winter where only a fraction of the former population labours under the yoke of a technocratic dictatorship. Therefore, only Fomalhaut-I remains of the ambitious planet-engineering projects of the old Terrans, a medium-sized sphere where great engines sunken under the surface, once known as stabilisator cities, have created Mediterranean and sub-tropical environments in a thin and ever-shrinking belt around the equator.