[geocentrism] Re: Two spin axes of Earth?

  • From: Neville Jones <njones@xxxxxxxxx>
  • To: geocentrism@xxxxxxxxxxxxx
  • Date: Thu, 15 Nov 2007 15:56:43 -0800

Philip,

You need to be clear about the spatial orientation of the orbiting body's axis, and the motion of a particular spot on the surface of that orbiting body, both with respect to the axis of rotation of the body and with respect to the centre of the turntable.

The translational movement you refer to is just the alignment of the body's axis with a specific direction in space. As Regner has pointed out, to turn this axis around (i.e., to make it precess as the body orbits the centre of the system) would require some unknown force, and no one here is advocating that.

A point on the surface of the body, however, except an infinitesimally small spot exactly at one or other of the poles, does not undergo this translational motion, except when sampled at whole multiples of a sidereal day. This is the reason for my questioning you regarding how nightly star trails are obtained. I hope that you will now be able to see that my question was relevant.

Neville
www.GeocentricUniverse.com


-----Original Message-----
From: pma15027@xxxxxxxxxxxxxx
Sent: Fri, 16 Nov 2007 08:17:53 +1000

 
"And I conceded that it was mechanically possible for an orbital motion to have no spin due to that motion."  I said it 
 
Its a pity all of us have not a toy gyroscope to play with.. 
 
Proof.
 
Place a high rev motor horizontally shaft pointing North on a vertical bearing at the edge of a turntable. (this could be at 24degrees off vertical, same difference, but why make it hard.) Its on a small turntable , at the edge of a big turntable .  frictionless bearings of course.
 
Spin the motor up to exactly 15,002 rpm..
 
Now turn the turntable one complete revolution .
 
an optical counter will confirm that the 15002 rpm remained unchanged. .
 
Yet the flywheel inertia of the motor rotor will keep the motor steadily oriented in one direction always to the North. .
 
As this motor is translated in space one complete orbit, it will not itself turn or spin relative to space ... ie relative to an observer above it. A camera on the top of this motor pointing up will not spin or record any light trails. 
 
The illusions of relative motions..  The astute observer will be able to see that this motor does appear to rotate relative to the top of the turntable.   If you were a "turntable person" standing on the turntable you would swear to God the motor was rotating on its bearing.. 
 
Just as many of you Earth people will so swear that the moon is not turning.. but you are all wrong..  Even in the geocentrism situation, the moon would still have to be spinning, only it would be close to one revolution per day rather than per 28 days.
 
Now there is a thought what star trail would you get if you had a camera on the north pole of the moon, doing its alleged 28 day spin. 
 
Philip 
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