Astronomers, amateur astronomers, who deserve to be commemorated on a medal. Astronomers were grouped into centuries by their year of birth. Although this ordering is far from perfect - as if an astronomer had been born at the end of a century he or she worked in the next one - we could avoid sub-categories to grow too large.
Astronomers of 15th-17th century
Astronomers of 18th century
Astronomers of 19th century
Astronomers of 20th century