Comments by "Scott Tovey" (@scotttovey) on "Veritasium"
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@83abhinavnigam
"my friend, but it will be a circle , not a straight line .straight lunes exist only on plane.
You can warp a plane on a sphere, but then it never remains a plane ."
A straight line is straight as a matter of perspective. While the theory of a straight line being nothing more than a segment of a very large circle, is valid; this is arguing practical sense against theory. Continue to long and people will begin to see the theory arguing guy a fool of fools and an educated idiot.
The straight line I described shows how, regardless of where you start on the ball, you will eventually meet the starting point if you do not change your direction on the ball. Thus, the parallel lateral lines are intentionally fabricated.
The purposes of the longitude and lateral lines is to assist in navigation. Knowing where they are in regards to the lines, coupled with star charts, various astronomical instruments such as the sextant, a and a compass and a time clock, enables the navigator to direct a ship to a given port or position on the seas.
The lines, despite circumventing the glob and therefore being a great circle, are, for practical purposes, lines that lead you on a straight course and therefore are straight.
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