Conversations on the Plurality of Worlds
Bernard le Bovier de Fontenelle
 The book itself is presented as a series of conversations between a gallant philosopher and a marquise, who walk in the latter's garden at night and gaze at stars. The philosopher explains the heliocentric model and also muses on the possibility of extraterrestrial life. Fontenelle's work was not cast polemically against the world views of either the Catholic Church or the protestant churches, nor did it attract the attention, positive or negative, of theologians or prelates.