In speculative fiction floating cities and islands are a common trope which range from cities and islands that float on water to ones that float in the atmosphere of a planet by scientific or magical meanswhile very large floating structures have been constructed or proposed in real life aerial cities and islands remain in the realm of fiction. Occurring sometimes in outer space or on a different planet or planetsit exists in literature comics film and. Military science fiction is a subgenre of science fiction that features the use of science fiction technology mainly weapons for military purposes and usually principal characters that are members of a military organization involved in military activity usually during a war.
city science fiction