Thank you, tommac, EvilEye, and agingjb, for your comments. My responses follow.
tommac: Parallel lines CAN be drawn on the surface of a balloon. For example, lines of latitude on the earth are parallel.
It is true that parallel STRAIGHT lines cannot be drawn on the surface of a sphere because only great circles are straight lines, and great circles necessarily intersect. It is true that straight lines on the surface of a balloon necessarily intersect.
I'm not aware that Einstein wrote about worm holes. Other theorists discussing Einstein's general theory of relativity wrote about worm holes. It is easy to create non-parallel lines. Any pair of intersecting lines is nonparallel. For example, every line of constant latitude on earth intersects every line of constant longitude.
EvilEye: You are right in saying there has to be an axis of rotation in order for something to spin.
There are no bases for your other statements. Saying them does not make them true.
agingjb: I do not understand what you are trying to say.
|