Planetary fiction is a subgenre of science fiction that focuses on the exploration and colonization of other planets. It often features advanced technology, alien life forms, and the challenges of living in different environments. This genre allows authors to imagine the possibilities of human expansion beyond Earth and the implications of such endeavors. Common themes in planetary fiction include survival, adaptation, and the ethical dilemmas of interacting with extraterrestrial civilizations. Notable works in this genre include Isaac Asimov's "Foundation" series and Arthur C. Clarke's "Rendezvous with Rama," which explore the complexities of life on other worlds and the future of humanity in the cosmos.