Leigh Douglass Brackett was an American science fiction writer known as "the Queen of Space Opera." She was also a screenwriter, known for The Big Sleep (1946), Rio Bravo (1959), and The Long Goodbye (1973). She worked on an early draft of The Empire Strikes Back (1980), elements of which remained in the film; she died before it went into production. In 1956, her book The Long Tomorrow made her the first woman ever shortlisted for the Hugo Award for Best Novel, and, along with C. L. Moore, one of the first two women ever nominated for a Hugo Award. In 2020, she posthumously won a Retro Hugo for her novel The Nemesis From Terra, originally published as "Shadow Over Mars".

Space opera is a subgenre of science fiction that emphasizes space warfare, with use of melodramatic, risk-taking space adventures, relationships, and chivalric romance. Set mainly or entirely in outer space, it features technological and social advancements in faster-than-light travel, futuristic weapons, and sophisticated technology, on a backdrop of galactic empires and interstellar wars with fictional aliens, often in fictional galaxies. The term does not refer to opera music, but instead originally referred to the melodrama, scope, and formulaicness of operas, much as used in "horse opera", a 1930s phrase for a clichéd and formulaic Western film, and "soap opera", a melodramatic television series. Space operas emerged in the 1930s and continue to be produced in literature, film, comics, television, video games and board games.