Ponder This
Well-Known Member
There was once a popular belief that the Earth was flat, that had we sailed too far, our ship would fall over the edge.
I haven't anything to add. I guess it's a reminder that things are not always as scary as they might seem.
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"The Sun revolves around the Earth" (obviously observable) and "the Earth revolves around the Sun" (inevitable consequence) are the same thing!
The heliocentric model was about planets besides Earth also revolving around the Sun.... which means that all those people who thought the Sun revolved around the Earth? They were right!
I think the take away is that sometimes the same thing can be seen from different perspectives. One perspective does not automatically make other perspectives wrong.
If flat Earth just meant what it obviously means to any observer (modern or medieval): that the surface of the Earth is locally homeomorphic to R^2... then it would be just another way to look at things that's not incompatible with the Earth's surface being globally homeomorphic to a sphere.