Findings:

• Rock Opera
• space opera
• space rock
• You are an animal on a big wet rock flying through space.
• soap opera
• A Night at the Opera
• Opera
• The Phantom of the Opera
• Squonk Opera
• Metropolitan Opera House
• sator arepo tenet opera rotas
• The Threepenny Opera
• What's Opera, Doc?
• Savoy Operas
• comic opera
• opera singer
• My neighbor is singing opera again
• Santa Fe Opera
• Soap opera hitmen
• opera metal
• Everything is a soap opera
• Opera Omnia
• sprocket opera
• Teapot Opera
• The Tale of Genji, an opera
• The Phantom of the Opera Soundtrack
• Definitely not the opera
• Why did Bach never write an opera?
• Chinese opera
• Sydney Opera House
• The Opera
• The Phantom of the Opera: Prologue
• The Phantom of the Opera: Chapter 1
• The Phantom of the Opera: Chapter 2
• The Phantom of the Opera: Chapter 3
• The Phantom of the Opera: Chapter 4
• The Phantom of the Opera: Chapter 5
• The Phantom of the Opera: Chapter 6
• The Phantom of the Opera: Chapter 7
• The Phantom of the Opera: Chapter 8
• The Phantom of the Opera: Chapter 9
• The Phantom of the Opera: Chapter 10
• The Phantom of the Opera: Chapter 11
• The Phantom of the Opera: Chapter 12
• The Phantom of the Opera: Chapter 13
• The Phantom of the Opera: Chapter 14
• The Phantom of the Opera: Chapter 15
• The Phantom of the Opera: Chapter 16
• The Phantom of the Opera: Chapter 17
• The Phantom of the Opera: Chapter 18
• The Phantom of the Opera: Chapter 19
• The Phantom of the Opera: Chapter 20
• The Phantom of the Opera: Chapter 21
• The Phantom of the Opera: Chapter 22
• The Phantom of the Opera: Chapter 23
• The Phantom of the Opera: Chapter 24
• The Phantom of the Opera: Chapter 25
• The Phantom of the Opera: Chapter 26
• The Phantom of the Opera: Epilogue
• The Phantom of the Opera: The Paris Opera House
• Royal Opera House
• Opera in Spain
• Horse Opera
• CHINA CLIPPER CALLING ALAMEDA: Opera, Britney, and a really big snake
• English National Opera
• Henry Street Chamber Opera
• The Opera House
• How to add E2 to your Opera search hotkeys
• Big-budget soap opera
• Beijing Opera
• Peking Opera
• Vagabond Opera
• The Beggar's Opera
• game opera
• Opera, Bork Edition
• Gertrude Stein, Grammar and Opera
• Opera etiquette
• Pistol Opera
• Goodspeed Opera House
• Andrew Lloyd Webber's Phantom of the Opera
• Opera IX
• Dream Oath Opera
• Batman and Robin and The Phantom of the Opera: a comparative study
• opera seria
• Light Opera
• Opera (user)
• Opera Singer (user)
• A night at the opera: salmon and cucumber for a posh picnic
• NY Metropolitan Opera
• The Floating Opera
• Repo! The Genetic Opera
• Revolutionary Pekinese Opera Ver.1.28
• Opera disease
• bare a pop opera
• Opera mate
• hard rock
• Rock and Roll
• indie rock
• big rock
• rock
• math rock
• Chris Rock
• Black Rock Desert
• 3rd Rock from the Sun
• Red Rock West
• Death of Rock and Roll
• Progressive Rock
• Rock in Opposition
• Rock and Roll Hall of Fame
• rock climber
• Rock Band
• Rock for Choice
• Sex and Drugs and Rock and Roll
• arena rock
• classic rock
• rock out
• rock climbing
• Get your rocks off
• alternative rock
• rock star
• fuzz rock
• punk rock
• Rock City
• Rolling Rock
• The Rock
• Val Hallen, Viking God of Rock!
• Kid Rock
• Kill Rock Stars
• pub rock
• Come in under the shadow of this red rock
• Rock Lobster
• rock archetype
• Rock Death
• corporate rock
• Schoolhouse Rock!
• Rock Senior Tour
• Simon's Rock College
• soft rock
• baroque rock
• Fraggle Rock
• Modern Rock
• Rock Against Racism
• other Rocks Against, back in the day...
• geek rock
• Weird Worlds: Return to Infinite Space
• TV Rocks!
• garage rock
• Rock Ballad
• rock video
• Rock Of Ages
• rock dove

If you Log in you could create a "space rock operas" node. If you don't already have an account, you can register here.