Black dwarfCanonLegendsInfinities The exogorth Sy-O was born near one such star with an iron core, and fed off of the energy that it emitted. Sources Star Wars: Build the Millennium Falcon 34AppearancesBrotherhood (Indirect mention only) (Unknown)Unknown UnknownNoneBrotherhood audiobook (Indirect mention only) (Unknown)Unknown UnknownNone"This Is No Cave" — From a Certain Point of View: The Empire Strikes Back (Mentioned only) (Unknown)Unknown UnknownNone"This Is No Cave" — From a Certain Point of View: The Empire Strikes Back audiobook (Mentioned only) (Unknown)Unknown UnknownNone