View Single Post
ravenest's Avatar
ravenest  ravenest is offline
ravenator
 
Join Date: 02 Feb 2006
Location: NSW, Australia
Posts: 13,835
ravenest 

I still dont get your point... every point on a line that is an axle is a centre of a rotating circle - equatorial or on a latitude, if you were standing on a latitude of 90 degrees you would be rotating on the end of an axle and not 'circling' around a wheel - they are all 'still points that dont move' ( they do actually move, they rotate) all along the axle, there is no difference between them. I cant see why any point around which the equator turns becomes significant or different (other than attention was drawn to the equator.


Unless you are talking about the axial tilt in relation to the plane of the solar system and its motion that makes precession ... in that case, over a loooong period, where it can be seen that each pole (when extended to the celestial sphere) makes an opposite moving circle ... THEN one could say the centre of the axis is stable and set at a central pivot point in relation to other points on the axle (that are slowly rotating in a circle ) ... Is that what you mean ?


If your idea is " the pole of spin is within the Earth, not without." ... well, of course; that's basic science we learn at primary school. Like we all know as well that the earth spins and not the stars around us. But the whole concept of the celestial globe is a based on the geocentric view, the CP is an extension of that by imagining the earths axis extends into space and locating that in the celestial map. Once you step off earth and view from the outside - celestial poles and spheres dissolve (except in relation to your new point of view and rotation).

I cant see how adopting a geocentric view ( that allowed you to see and understand the idea of a celestial Sphere) now has this Cosmo-centric (or 'scientific' ) view that, really, the earth is rotating and not the cosmos (which we all know) so therefore the pole of the imagined Celestial Sphere is in the earth .... and by some extension of that, that makes the Pole Star (which you say isnt really the pole star -due to its circularly rotating nature over time of the CP ) a point of the Earth's axis in space, and since it is the earths axis the star is really the Earth.

Sorry .... It just dont add up ... you seem to be multiplying apples by oranges . To me anyway.
Top   #27