Science fiction operas

''''''' (, beginning and ending with a glottal stop) is the first opera in the Klingon language, billed as "The first authentic Klingon opera on Earth". It was composed by Eef van Breen to a libretto by Kees Ligtelijn and Marc Okrand under the artistic direction of Floris Schönfeld. The story of ' is based on the epic legend of "Kahless the Unforgettable", a messianic figure in the history of the fictional Klingon species.

opera by Leoš Janáček

opera by Joseph Haydn

opera by György Ligeti

thumb|275px|Karlheinz Stockhausens grave with the score to LICHT . Licht (Light), subtitled "Die sieben Tage der Woche" (The Seven Days of the Week), is a cycle of seven operas composed by Karlheinz Stockhausen between 1977 and 2003. The composer described the work as an "eternal spiral" because "there is neither end nor beginning to the week." Licht consists of 29 hours of music.

opera by Leoš Janáček

opera by the American conductor and composer Lorin Maazel on a libretto by J. D. McClatchy and Thomas Meehan after George Orwell (2005)

fairy-tale opera by Jacques Offenbach

opera by Karl-Birger Blomdahl

opera in three acts by Michael Tippett