alt Hacker News> from a flat earth
That in the same paragraph as Galileo is a bit self contradicting. The church was stuck on an ancient greek model of the universe and the greeks were very much aware that the world was round, they once spend a day or two measuring it.
I'm sure that there would have been examples of all the issues that thrance covers, but generally flat earthing wasn't a thing back then. This is a useful website for the arguments: https://historyforatheists.com/the-great-myths/