centuries later her dream became part of the symbol of terra two , the iconic image ever present in educational materials , planetary governmental issues and almost every other official insignia , a shiny titanium ring surrounding their beautiful coffee colored planet - the orbital particle accelerator that spun slowly around the equator half way between the planet 's atmosphere and its two natural satellites , gracefully responding to the varying pulls of the two suns , the moon and the planet itself with its strange undulating dance .