The book looks at ways of world-building in prose fictions of cosmic voyage in the seventeenth century. With the rise of the New Astronomy, there equally was a resurgence of the cosmic voyage in fiction. Various models of the universe were reimagined in prose form. Most of these voyages explore imagined versions of a world in the moon, such as the cosmic voyages by Johannes Kepler, Francis Godwin and Savinien Cyrano de Bergerac. In Margaret Cavendish’s
The Blazing World
, an eponymous imaginary planet is introduced. The book analyses the world-building of cosmic voyages by combining theories of world-building with contemporary concepts from early modern literature. It shows how imaginary worlds were created in early modern prose literature.