Why doesn't Astronauts see this pushing away of light, or pictures from satellites?
They do. Thats why the earth looks like a globe.Again.
Either light travels in straight lines and the earth is curved, and the metic is constant.
or
The earth is flat, light travels in a curve away from the earth, and the metric isnt constant.
Either of these would make all observations look exactly the same.
Saying look I see this therefore.. doesnt porve anything because It would all look the same
My original statment still stands
Excuse me Damp, but you cannot prove that the earth isnt flat. Ok so some of the physics you learnt you would have to assume is wrong. For example, light would need to bend away from the flat surface of the earth. (Which you can only prove it doesnt if you take the earth to be round, its one of those self comfirming thoeries). And also that the metric would need to change, which again we only assume it doesnt, cos it seems not to change.
(And dont give me any of that "You will fall of the edge), cos metric changes so that you travel an infanitly smaller, (or larger depending on if we want an infinate plane or not), distance in the same unit time as you get closer to the "Edge". The only way to really really prove that the earth isnt flat is to be at all points of its sruface at the same time which you cannot do. So we accept the round earth model, cos it removes the topalogical parts of space travel equations.
(And dont give me any of that "You will fall of the edge), cos metric changes so that you travel an infanitly smaller, (or larger depending on if we want an infinate plane or not), distance in the same unit time as you get closer to the "Edge". The only way to really really prove that the earth isnt flat is to be at all points of its sruface at the same time which you cannot do. So we accept the round earth model, cos it removes the topalogical parts of space travel equations.
It makes no difference at all which one is true, because everthing would look and act exactly the same in either situation. The point is, that because everyting would feel and act the same, it was easier to assume it was a globe, because it make the explination of everthing else easier. And as stated the simplest solution is probably right. But you cannot prove or disprove either situation. Because its unprovable.