lines of meridian run from the north pole to the south pole.
lines of what run from the north pole to the south pole?
meridian
140th meridian west





























the meridian 140° west of greenwich is a line of longitude that extends from the north pole across the arctic ocean, north america, the pacific ocean, the southern ocean, and antarctica to the south pole.





























the line is the divider in the area of warning responsibility between the national hurricane center and the central pacific hurricane center in the north pacific ocean.





























the 140th meridian west forms a great circle with the 40th meridian east.





























section::::from pole to pole.





























starting at the north pole and heading south to the south pole, the 140th meridian west passes through:
140th meridian west
surprisingly, if you run through the path twice, i.e., run from north pole down to south pole, jump back to the north pole (using the fact that north and south poles are identified), and then again run from north pole down to south pole, so that "φ" runs from 0 to 4, you get a closed loop which "can" be shrunk to a single point: first move the paths continuously to the ball's surface, still connecting north pole to south pole twice. the second half of the path can then be mirrored over to the antipodal side without changing the path at all. now we have an ordinary closed loop on the surface of the ball, connecting the north pole to itself along a great circle. this circle can be shrunk to the north pole without problems. the plate trick and similar tricks demonstrate this practically.
3d rotation group