Drawing by Kepler: Lunar Days and Nights
History of Astronomy

“Somnium”: Kepler’s Dream of Alien Worlds

Johannes Kepler’s complete works comprise more than 20 volumes—a veritable repository for historians of science. Among them there is the probably first novel incorporating elements of “hard sci-fi”: Somnium (The Dream), posthumously published by Kepler’s son in 1634. Kepler’s text, rather a short story than a fully elaborated novel, describes a flight to the moon …

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