• Space opera : is a subgenre of science fiction set mainly or entirely in outer space, that emphasizes space warfare and melodramatic adventure, and often risk-taking as well aschivalric romance; usually involving conflict between opponents possessing advanced abilities, futuristic weapons and other sophisticated technology.
Notable space opera novels include the Foundation series (1942–99) by Isaac Asimov et al. and the Ender's Game series (1985–present) by Orson Scott Card. An early notable space opera film was Flash Gordon (1936–present) created by Alex Raymond. In the late 1970s, the Star Wars franchise (1977–present) created by George Lucas brought a great deal of attention to the genre.