The astronomer Francesco Sizzi worked himself into a tizzy: "More rocks in space? There're seven holes in a face! Pssh! Galileo calls himself scientist, but is he?"
Note: When Galileo suggested Jupiter had moons, Sizzi summarily rejected the idea based on the “rationale” that there couldn’t be more than seven natural satellites because there are seven holes in a mammal’s head, seven days in a week, and [somehow] seven metals… ergo, seven astronomical bodies, maximum.