This map focused on comets, which were objects of great curiosity and interest in the early modern period. Comets were often viewed as celestial omens, and their appearances were meticulously observed and recorded by astronomers. Theoria Cometarum depicts the paths of notable comets across the sky, along with information about their appearances and trajectories. It would have provided valuable data for astronomers studying these objects and contributed to the understanding of cometary behavior.