Literary notes about Planisphere (AI summary)
In Jules Verne's narrative, the word "planisphere" is used not only as a cartographic tool but also as an essential instrument for exploration and navigation. In several passages, the planisphere is employed to plot coordinates ([1]) and to indicate the course and direction of mysterious, adventurous journeys ([2], [3]). Moreover, it serves as a visual guide to trace the route of the Nautilus and to mark significant points along its path ([4], [5]). Through these literary uses, the planisphere emerges as a symbol of discovery, bridging the gap between scientific precision and the vast unknown of the seas.