3 ms·
From the article: > To be pedantic, by ‘straight line’ here I really mean ‘geodesic’ — the > generalisation of ‘straight line’ for curved surfaces and spa
by runjake 2y ago
From the article:
> To be pedantic, by ‘straight line’ here I really mean ‘geodesic’ — the
> generalisation of ‘straight line’ for curved surfaces and space as well
> as ‘flat’, Euclidian spaces.
> A geodesic is just the shortest path between two points in a surface. If
> you’re placed on a surface and continually walk “forward”, by definition
> you will trace out a geodesic.
> Some people replying to my original tweet pointed out that a straight
> line from the original point and direction would take you into space."