Rhommamool existed as a celestial body situated within the Expansion Region of the galaxy.
- The initial mention of Rhommamool can be found in Star Wars: Build the Millennium Falcon 52 (Guide to the Galaxy: The History of Neimoidia).
- Further information is available in the article "Where in the Galaxy Are the Worlds of Star Wars: The Force Awakens?" on StarWars.com (backup link).
- Additional details can be located in Star Wars: The Force Awakens Beginner Game.