Symbiotic Star System R Aquarii . ... Such is the case with the binary star system R Aquarii - a "symbiotic" star system. Here two stars, a variable giant and a white dwarf companion - create both a nebula and a jet . ... The two visible shells in the nebula likely resulted from two separate outburst events. Much about symbiotic star systems remains unknown. ... NASA Web Site Statements, Warnings, and Disclaimers . NASA Official: Jay Norris. ... A service of: LHEA at NASA / GSFC . ...