The physical boundaries of the local universes 
          are not easily identified, although the major and minor sectors of Orvonton 
          are clearly distinguishable. What separates one local universe from 
          all others is the presence of a local universe Creative Mother Spirit. 
          
        Nebadon sprang from Andronover and other 
          nebulae. Today it travels in an increasingly settled orbit around the 
          Sagittarius center of our minor sector. Our system of Satania is one 
          of one hundred systems in the constellation Norlatiadek. 
        There are more than two thousand suns 
          in Satania. Suns serve as way stations for concentrating the energy 
          circuits of the material creations. Some larger suns may break up or 
          split into double stars. Some are solid, especially the older ones, 
          and their density may be so great that one square inch weighs three 
          tons. Urantia's gaseous sun has a density of about one and a half times 
          that of water.
        Suns generate light and x‑rays. 
          Light is real; it can be highly explosive. Energy, including light, 
          moves through space in straight lines and is responsive to other forces 
          and energies. Large suns maintain such gravity control over their electrons 
          that light escapes only with the aid of powerful x-rays. These rays 
          penetrate all of space, and contribute to the maintenance of ultimatonic 
          energy associations. Atoms and electrons are subject to physical gravity, 
          but ultimatons are obedient only to Paradise gravity. 
        Our sun's surface temperature is about 
          six thousand degrees Fahrenheit; the interior temperature can approach 
          thirty-five million degrees. Sources of this enormous energy include 
          annihilation of atoms, transmutation of elements, accumulation of space 
          energies, and solar contractions. A regulating blanket of hot gases 
          envelops the sun and acts to stabilize solar heat loss. The heat given 
          out by the sun each second is enough to boil all the water in all of 
          Urantia's oceans, instantly.
        Earth's sun is six billion years old and 
          will continue to function in its present state of efficiency for another 
          twenty-five billion years. It currently radiates almost one hundred 
          billion tons of matter annually.