Comment by pbhjpbhj
7 years ago
Obvious perhaps, in a mathematically idealised system that's idealised according to axioms that are unstated ... a non-equitorial latitudinal line on a sphere is straight.
7 years ago
Obvious perhaps, in a mathematically idealised system that's idealised according to axioms that are unstated ... a non-equitorial latitudinal line on a sphere is straight.
Walk (or drive, or sail) without turning and you’ll follow a great circle.
Stay perpendicular to North/South and you follow a parallel.
None of these things is of course possible IRL.
Staying perpendicular to north/south requires turning, unless you’re on the equator.
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