- On Faded Page you can download The Great Divorce in text, HTML, Epub, and other formats.
- The Great Divorce is a theological dream vision by C. S. Lewis, in which he reflects on the Christian conception of Heaven and Hell.
- Celestial sphere (Wikipedia)
In astronomy and navigation, the celestial sphere is an abstract sphere that has an arbitrarily large radius and is concentric to Earth. All objects in the sky can be conceived as being projected upon the inner surface of the celestial sphere, which may be centered on Earth or the observer. If centered on the observer, half of the sphere would resemble a hemispherical screen over the observing location.