MacM, 2inq, I addess both of you as we have been discussing matters close to this. I have juist read the link MacM posted. Very interesting. I have a specific question for both of you that may have sone application directly to the issue of synchronizaton of timed systems that functionally related to the motion of solar system bodies. The link specified the focus of atention on tthe rotaional and orbit motion of the planet earth, and basically asserting the lack of any 'orbit' implications, The question of earth's motion through space is an old one and one that MM did not resolve and if anything obsccured if for no other reason than the MM experiments were not analyzed to their natural conlcusion:Witness the current dicussions. But I smell that we are right hot on the trail. I am going to refer to Dayton Millers's experiments that followed the MM exeriments in some elaborate detail. There Miller measured the absolute velocity of the sun at 208 km/sec wrt some distance mass center Miller located as due south wrt the earth's axis of rotation. velocity (claiimed at least), Here are some calculations which may be a bit muddleds, which I will neaten if anyone asks. For instance the sun's yearly linear trajectory grossly skews the earth's helical motion such that helix, the solar "spring" ("solar DNA") stetched through space relative the earth/sun orbit radius is approximately 8 degrees, The ratio of the earth linear distance for a point on the equator rotating for one daily roation is : (208km/sec)*(24*3600) = 17,9711,200. km, the point on the wquator is .46*3600*24 = 39744km. The agreement is that the earth's axis is aligned along the drection fo the trajectory of the sun (sun and rotation vectors are essentially 90 degrees..) If we merely took the ratio of total distance covered in one day we get tan^-1(39744/17971200) or .125 degress. Said another way, the ratio of sun vector veocity is 457 to 1 - sun velocity to equator velocity vectors. My question is does not this say that theinstantaneous vector of rotational motion being orthoganal to the sun motion vector can be resolve by a simple vector addiuion ?