Astral Light
In occult terminology, the invisible region that surrounds the Earth, perceived by those who are psychically developed. Within its realm is recorded every condition, event or circumstance – past, present and future. It is called the “great terrestrial crucible,” in which everything is resolved and perpetuated. The psychically gifted behold there, in panoramic detail, the histories of nations and individuals, and are able to reveal coming events by what they see mirrored on the astral screen. It has been spoken of as the Mercury of Nature.
DeVore, Nicholas. Encyclopedia of Astrology. New York: Philosophical Library, 1947.