Note that this is an astronomical description of the precessional movement and the vernal equinox position in a given constellation may not imply the astrological meaning of an Age carrying the same name, as they ages and constellations only have an exact alignment in the "", meaning once in each c The rotation axis of the Earth describes over a period of about 25,800 years a small circle blue among the stars, centred on the northpole blue E and with an angular radius of about 23
Neil Spencer, True as the Stars Above, Victor Gollancz London, 2000, p The yellow axis, pointing to Polaris is the situation now

As seen from the drawing, the orange grid, 5000 years ago one intersection of equator and ecliptic, the was close to the star of.

العصر الفلكي
Note that when the is seen from outside constellations appear in mirror image
تاريخ مصر
Nicholas Campion, The Book of World Horoscopes, The Wessex Astrologer, Bournemouth, Great Britain, 1998, pp
ألف سنة (العصر الألفي)
By now the yellow grid it has shifted red arrow to somewhere in the constellation of Pisces
Percy Newberry 1943 : "Queen Nitocris of the Sixth Dynasty", in: The Journal of Egyptian Archeology, vol
Also note that the daily rotation of the Earth around its axis is opposite to the precessional rotation Dan'el Kahn, "The Inscription of Sargon II at Tang-i Var and the Chronology of Dynasty 25," Orientalia 70 2001 , pp

When the polar axis precesses from one direction to another, then the equatorial plane of the Earth indicated with the circular grid around the equator and the associated celestial equator will move too.

وقت سنة العصر القبلية
The orange axis was the Earth's rotation axis 5000 years ago when it pointed to the star Thuban
وقت سنة العصر القبلية
Where the celestial equator intersects the ecliptic red line there are the equinoxes
العصر كم سنة