Somnium is a Latin word for Dream. This novel was written by Johannes Kepler in 1608, in a time when a trip to the ethereal regions of the moon would be possible only with the assistance of supernatural forces. Historians consider this lunar exploration a remarkable and revolutionary text, and one of the most provocative and innovative of Kepler's works. Great authors/scientists such as Isaac Asimov and Carl Sagan suggested it as the first science fiction story. If it is not, we can at least consider it as the first serious scientific work about lunar astronomy.

Somnium. A perfect virtual world, where the sleeping mind walks ... but corruption and evil can not be silenced for long. 2504 AD. Global peace, earth restoration, and equality. The perfect world. During the day people live out their passions; and each night, with the help of headsets, they can be anything and go anywhere with merely a thought. Decorated with skin art and a wild spirit, Somnium allows Claudia the freedom to be herself, while exploring a world long gone. Yet peace rarely lasts, and anything manmade can be corrupted...

This book tells the story of the early modern astronomer Johannes Kepler’s Somnium, which has been regarded by science historians and literary critics alike as the first true example of science fiction. Kepler began writing his complex and heavily-footnoted tale of a fictional Icelandic astronomer as an undergraduate and added to it throughout his life. The Somnium fuses supernatural and scientific models of the cosmos through a satirical defense of Copernicanism that features witches, lunar inhabitants, and a daemon who speaks in the empirical language of modern science. Swinford’s looks at the ways that Kepler’s Somnium is influenced by the cosmic dream, a literary genre that enjoyed considerable popularity among medieval authors, including Geoffrey Chaucer, Dante, John of Salisbury, Macrobius, and Alan of Lille. He examines the generic conventions of the cosmic dream, also studying the poetic and theological sensibilities underlying the categories of dreams formulated by Macrobius and Artemidorus that were widely used to interpret specific symbols in dreams and to assess their overall reliability. Swinford develops a key claim about the form of the Somnium as it relates to early science: Kepler relies on a genre that is closely connected to a Ptolemaic, or earth-centered, model of the cosmos as a way of explaining and justifying a model of the cosmos that does not posit the same connections between the individual and the divine that are so important for the Ptolemaic model. In effect, Kepler uses the cosmic dream to describe a universe that cannot lay claim to the same correspondences between an individual’s dream and the order of the cosmos understood within the rules of the genre itself. To that end, Kepler’s Somnium is the first example of science fiction, but the last example of Neoplatonic allegory.

Both a scientific treatise on lunar astronomy and a science-fiction story about a voyage to the moon, Kepler's Somnium went unrecognized for centuries. This edition presents a full translation from the original Latin.