A binary star consists of two stars orbiting around their common barycenter. Systems of two or more stars are called multiple star systems. These systems, especially when more distant, often appear to the unaided eye as a single point of light. The secondary star revolves around the primary one and two names can be given, but only one certificate is sent as both stars are intertwined. The Binary Star Package is most popular for those who have an upcoming anniversary or for those who have lost a loved one and would like to be intertwined forever.