10. Architectural Worlds. These are the worlds which are built according to plans and specifications for some special purpose, such as Salvington, the headquarters of your local universe, and Uversa, the seat of government of our superuniverse.

There are numerous other techniques for evolving suns and segregating planets, but the foregoing procedures suggest the methods whereby the vast majority of stellar systems and planetary families are brought into existence. To undertake to describe all the various techniques involved in stellar metamorphosis and planetary evolution would require the narration of almost one hundred different modes of sun formation and planetary origin. As your star students scan the heavens, they will observe phenomena indicative of all these modes of stellar evolution, but they will seldom detect evidence of the formation of those small, nonluminous collections of matter which serve as inhabited planets, the most important of the vast material creations.

Irrespective of origin, the various spheres of space are classifiable into the following major divisions:

1. The suns—the stars of space.

2. The dark islands of space.

3. Minor space bodies—comets, meteors, and planetesimals.

4. The planets, including the inhabited worlds.

5. Architectural spheres—worlds made to order.

With the exception of the architectural spheres, all space bodies have had an evolutionary origin, evolutionary in the sense that they have not been brought into being by fiat of Deity, evolutionary in the sense that the creative acts of God have unfolded by a time-space technique through the operation of many of the created and eventuated intelligences of Deity.

The Suns. These are the stars of space in all their various stages of existence. Some are solitary evolving space systems; others are double stars, contracting or disappearing planetary systems. The stars of space exist in no less than a thousand different states and stages. You are familiar with suns that emit light accompanied by heat; but there are also suns which shine without heat.

The trillions upon trillions of years that an ordinary sun will continue to give out heat and light well illustrates the vast store of energy which each unit of matter contains. The actual energy stored in these invisible particles of physical matter is well-nigh unimaginable. And this energy becomes almost wholly available as light when subjected to the tremendous heat pressure and the associated energy activities which prevail in the interior of the blazing suns. Still other conditions enable these suns to transform and send forth much of the energy of space which comes their way in the established space circuits. Many phases of physical energy and all forms of matter are attracted to, and subsequently distributed by, the solar dynamos. In this way the suns serve as local accelerators of energy circulation, acting as automatic power-control stations.

The superuniverse of Orvonton is illuminated and warmed by more than ten trillion blazing suns. These suns are the stars of your observable astronomic system. More than two trillion are too distant and too small ever to be seen from