Maybe related, maybe not, but I noticed this quote is incorrect: > Odd things happen when we [project 3D space onto a 2D surface]. On a 2D map, an airplane tak

Maybe related, maybe not, but I noticed this quote is incorrect: > Odd things happen when we [project 3D space onto a 2D surface]. On a 2D map, an airplane taking the most direct path between two cities appears to travel in an arc, and satellites orbiting the globe appear to oscillate in a sinusoidal path If you use the Gnomonic projection then all great circles become straight lines.[0] The only "catch" is that you need to cut the Earth into two hemispheres. [0] https://en.wikipedia.org/wiki/Gnomonic_projection https://en.wikipedia.org/wiki/Gnomonic_projection