“Moreover, it is surprising that anyone takes for granted that those stars, observed by the Chaldeans and the Babylonians and the Egyptians, which the general run of people call “wandering” but which Nigidius [Figulus] calls “wanderers,” are not greater in number that is commonly thought. Favorinus believed it could be the case that there were other planets with powers identical [to those already known]; without [accounting for] these, a correct and constant observation [of the heavens] could never come to fruition, but men might not be able to spot them because of their extreme dimness or altitude. ‘For,’ he said, ‘there are certain stars that are only visible on certain tracts of the earth, and only known to the denizens of those tracts, but are not seen elsewhere and not known to all.'”