Astronomy in the 16th century was a rapidly developing field, as new discoveries and advances in technology allowed astronomers to better understand the nature of the universe. Because it was growing in popularity during this time, it would also sometimes become somewhat of a fashion statement. Designers sized down these astronomy tools to become fashionable finger rings. They’re similar to armillary spheres. This is a 16th-century German ring that folds into an astronomical sphere. Overall, the 16th century was a time of significant progress and discovery in the field of astronomy, and many of the ideas and concepts developed during this time continue to be important in modern astronomy.