@Wally, was that a mindless shitpost or bait. You can't see the so-called curvature from a plane window. But the flight paths of jets do support a Flat Earth theory, since they would not be logical on a sphere.
[Sun-evening]________________[Sun-midday]_________________[<--- Me watching this direction]_____
If me and sun sun/coin are on the same flat surface, and one of us moves away, then there is litterally no way we can lose line of sight. The apparent magnitude decreases, but it wont disappear. Ontop of that the sun is actually above the surface, and not on it. And I can even see a sunset on a plane.
Well, to be pedantic, the statement "The earth is a sphere" is wrong.. :)
The correct statement could be: "The surface of the earth is homotopic to a sphere" (here, sphere means just the shell, as is the convention in mathematics)
If i said that "The earth is homotopic to a ball", that would also be true, but the statement is too weak to be of any importance :).
Unfortunately, neither of these statements rule out the "dinosaur earth" :D, so maybe we need a stronger way of stating the result (topological statements are too weak) - suggestions?
Maybe we could maybe say something like: "Take the center of mass of the earth 0. For any unit vector u, let lambda_u u denote the scaled vector u corresponding to the point where the scaling cuts the surface of the earth. Then, there exists some R such that for all unit vectors u, |lambda_u - R| < e." (e is some fixed small number)
