 The humans dwell in twelve planets known as the Colonies, whose  names are reminiscent of the Zodiac signs (in Battlestar Galacticas  Season 2, Laura Roslin mentions the Zodiac signs as the old names of  the colonies): Aerelon, Tauron, Gemenon, Canceron, Leonis, Virgon,  Libris, Scorpia, Sagittaron, Caprica, Aquaria and Pykon. In the end  of the mini series we discover theres a 13th colony called the  Earth. This amount of 13 colonies is reminiscent of the 13th  colonies which got independent from Great Britain in North America  and became the United States.