Precursor562
QUOTE
Lines on a globe. The latitudinal lines are parallel and they intersect the longitudinal lines at right angles. The longitudinal lines therefore must also be parallel and they meet at the end, right? WRONG. It completely ignores the fact that the lines are on a curved surface thus they are not truly straight and so they are not parallel. Can lines be drawn on a curved surface and be truly parallel? Yes and the latitudinal lines are a perfect example of that. However the longitudinal lines intersect the same latitudinal lines twice (since all these lines form loops) at exactly the opposite side of each latitudinal line. In order for this to happen and maintain a 90 deg intersection the longitudinal lines must converge then diverge twice (at opposite ends which is your north and south poles).
It is possible for the longitudinal lines to maintain the 90 deg intersection and remain parallel. They must simply give up intersecting the same latitudinal lines at opposite ends. Simply take the existing latitudinal lines and rotate them about the sphere 90 deg. This will give you a new set of lines that are just as parallel as the latitudinal lines and will intersect with the latitudinal lines at a 90 deg angle.
Since all cosmic bodies in the Universe "orbit" ie they travel in curved lines
Does light from say a star source travel in curved lines, and therefore does a light ray eventually cross its own path ?
but since the source is constantly moving, maybe the trace might be more like a spirographic image.
