One comment on “180 — Star Wars

  1. Easy-peasy. Define a straight line as the shortest distance between two points. On a flat surface, given a straight line and a point outside that line, it is possible to construct one and only one straight line through that point that will never intersect with the original line. That’s Euclid. (Think train tracks.) On a sphere, where every straight line is an arc of a great circle, all straight lines must eventually converge. (Think lines of longitude meeting at the poles.) And if space is saddle-shaped, straight lines are more like parabolas that follow the curve of the saddle, so it’s possible to construct an infinite number of those through a point, none of which will ever meet the original line because they all curve away from it with differing degrees of steepness. Three types, just like Joe said.

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