yes the north pole is in the middle, and as you walked 'east' it would take you in a circle on a flat earth. if you actually walked 'a straight line' you would end up walking south, and eventually hit the Antarctica.
but if you followed the compass, it would indeed take you in a circle.
The magnetic North pole actually shifts all the time it moves as the Earth shifts on it's axis. It's current location is in Canada at 86.5°N 172.6°W and far away from the geographic North pole. Ask someone in Canada how their compass behaves there for the interests of scientific experiment. You could compare the results between the heliocentric & globe Earth models. I don't know the results, I would imagine the compass would behave erratically near to it but a bit further away it could prove either theory correct. It could be interesting to know maybe someone will see this comment & try.
yes the north pole is in the middle, and as you walked 'east' it would take you in a circle on a flat earth. if you actually walked 'a straight line' you would end up walking south, and eventually hit the Antarctica.
but if you followed the compass, it would indeed take you in a circle.
The magnetic North pole actually shifts all the time it moves as the Earth shifts on it's axis. It's current location is in Canada at 86.5°N 172.6°W and far away from the geographic North pole. Ask someone in Canada how their compass behaves there for the interests of scientific experiment. You could compare the results between the heliocentric & globe Earth models. I don't know the results, I would imagine the compass would behave erratically near to it but a bit further away it could prove either theory correct. It could be interesting to know maybe someone will see this comment & try.
Pan Am went over the south pole.
Several people have flown over the south pole.
https://www.aopa.org/news-and-media/all-news/2015/january/22/around-the-world-over-the-poles
http://transglobe-expedition.org/expedition/
It's been circumnavigated by many sailors, all with times consistent with a 14,000 ish mile continent and not a 60,000 mile ice wall.
http://www.ybw.com/news-from-yachting-boating-world/lisa-blair-begins-world-record-attempt-circumnavigate-antarctica-47089
http://yachtpals.com/boating/antarctica-boats
And it's been crossed on foot from one side to the other.
https://www.wired.com/2016/02/people-cross-antarctica-all-the-time-its-still-crazy-hard/
Pretty clear Antarctica is a circumnavigable continent.