The City of Aurora is the capital of the planet of Solaria and the Solarian Empire. It is partially situated on the ground and partially in the air. The floating city is called Aurora Sacralia, referring to its status as the center of the Solarian Empire. Aurora Sacralia is levitated more than 1,000 meters in the air by repulsor machines who levitate the city and the underlying rock, surrounded by clouds where the Solarians feel more comfortable. Aurora is the largest city of Solaria, with a total population of more than 900 million in the floating city and more than 10 billion in the ground city.