On Friday, April 10, 2015 at 10:57:06 PM UTC+1, Andre wrote:
Hello all,
I wonder if there are software that would calculate the rate of precession as you move through time, forward and backward. For instance, in about 12 000 years, Vega will be the north star. Are there software that would determine accurately the movements of all stars.
Thanks
Andre
I wish people would approach the matter with common sense instead of going on an assertion binge .
Here is the alignment of Newgrange which still happens today as it did on the Solstice over 5200 years ago -
https://www.youtube.com/watch?v=KVXWZkwV0RQ
What this means, for people with intelligence to work through these things, is that the position of the North/South poles were in the same position with respect to the Sun and to the circle of illumination 5200 years ago as they are today.If axial precession were true, as it is currently understood, then the ancient alignments of Newgrange and Stonehenge would have been lost many,many centuries ago.
The precession of the Equinoxes has the same root cause as the observation that Sirius skips an appearance by one day after 4 cycles of 365 days. The precession is a consequence of the proportion of rotations to orbital circuits where there is a deficit between the 365 days 5 hours 49 minutes and the idealized timekeeping format of 365 days 6 hours on which the leap day rotation is based. The difference registers in a loss of orbital position or a precessional drift just as Sirius seems to drift back into the Sun's glare over the course of 4 years and highlights the proportion of rotations to orbital cycles. The precessional drift is a further refinement of this principle.
The older astronomers used a framework of the Sun moving through the constellations hence the obstructive nature of axial precession for contemporary purposes. The more productive approach is the apparent motion of the stars behind the Sun thereby accounting for the Earth's own orbital motion and freeing up the perspective where all planets have dual surface rotations to the Sun
https://www.youtube.com/watch?v=612gSZsplpE
About 48 seconds into that time lapse footage the dual rotations become visible.