Recent content by red_ed

the original problem spec was in error. In the original spec, it was postulated that the sun was over Greenwich, two ob this problem spec contains an error. Observer 1 and 2 facing each other across the line of midnight are both inside the same day. If either crosses the midnight line they...

Wow. I am amazed by the response. ``` I will hazard what I think you may see as a paradox: Those two scenarios, when put tegether, create a single scenario wherein two observers, standing in the same place at the same time - each think it is a different day. One can literally face the other...

question posted already.

You can add date-lines to the puzzle, but that simply complicates the puzzle without solving it.

Though experiment: imagine yourself floating above one of the poles of the earth. Since I'm in the Northern Hemisphere I will use the North pole. Looking down at Noon Greenwich time, the sun is directly above Greenwich. Now freeze the tableau and imagine yourself as an infinitely fast...

I've been told this is an extension of the Ehrenfest paradox, which is interesting but not explanatory. Gedankenexperimenten: take any object and rotate it. Lets use a disc for simplicity, but by extension the question applies to any relative motion. The center of the disc is stationary...