> Why are all the other planets round? Why does the earth cast a round shadow on the moon (vice versa for eclipse)? Why can you fly to India in either direction in the same amount of time?
Well, “round” can be an attribute of a plane; its typically referred to as a circle. A more descriptive term is “spheroid” but outside of a small set of long-distance navigation tasks the flat earth mental model is perfectly sufficient and computationally less expensive.
Well, “round” can be an attribute of a plane; its typically referred to as a circle. A more descriptive term is “spheroid” but outside of a small set of long-distance navigation tasks the flat earth mental model is perfectly sufficient and computationally less expensive.