> Three things are possible, that would be observed from such an [polar] orbit. > > 1. In the HC system, it should show the earth moving towards the > east making one 24 hour rotation for every 24 hour period of its > own orbit. > > or > > 2. It would show the earth quite stationary, and its is orbit > would fly over the same longitude for the full period of its orbit. > > The third possibility, is it could show the effect of Roberts > cosmically rotating Plenum. > Continuing from the last post..... the plenum's effect on the polar orbit depends on altitude: if > 5 1/2 earth radii, the plenum would push the polesat (weakly) E to W, like the stars, near the equator if < 5 1/2 earth radii, the plenum would push the polesat (weakly) W to E, like the atmosphere, near the equator > It is this effect that I want to discuss...within the GC > framework. We are comparing two identical orbits as regards > Newtonian rules. One vertical, and one horizontal. > > In the vertical we have no problem of a hovering satellite. > Centrifugal and gravitational forces will balance... > > In the horizontal case though we do not.. The satellite is > stationary and not moving at all. Are we then moving from > positive centripetal force to a negative centipetal force... > > Let me close by posing a mental exercise. Remember the earth is > not moving here. > > Take the stable orbit I have created around the poles, (imagine > it as a spinning ring, with a black dot on it, which it is. ) and > nudge it slowly till it has shifted 90 degrees to an equatorial > orbit. It now is in the exact same state as regards orbit, as our > original geosynchronous satellite. > > What stopped it moving? The polesat has a stable orbit in classical physics because angular momentum is conserved. To change the AM, an external torque must be applied, which explains what stops the motion at the equator. btw: the satellite planar motion won't stop if the torque continues..... Using the euphemistic term 'nudge' or 'quasi-torque' or 'pseudo torque' won't avoid the fact that a finite torque must be applied. Of course, using infinitesimal torques will work, but require an infinite time to shift the orbit to the equator. Can we wait that long? d(8^)> Pax Christi, Robert > > Philip. > > > > > > > > > >