Pay attention Regner, I am attaching these diagrams again so as to offer yet another oportunity to join the team and come in for the big win........................Now what do all these have in common...UMMMMM .........I wonder if it has anything to do with the roatation of a fixed camera (over the course of a year) around the sun on the earth's "translational orbit"....of that very same sun........ .umm .........................you see there is more then one way to demonstrate rotation on earth on 2 different axis ...And you thought I was just making it all up......shame on you for thinking such a thing... ...:-) If whatever rotational condition produces nightly star trails then that same condition must produce annual ones as well (if any such motion exist) there will be a clear distinction between the two sets of star trails because the distance of a star from what ever axis exist determines the size of star trails. Since the two axis are offset by 23.44 degrees the stars cannot all have the same distance from both axis simultaneous thus, if the motion existed there would have to be different sets of star trails with different sizes.... In fact if the HC motion really existed it would just all be a big blur........