As can be seen, with a view from the centre of the earth upon the winter solstice of 500 BC, looking towards the Milky Way (NB: daylight is ‘turned off’ in these images), one can see the sun markedly off to the west of the galactic equator. From this initial configuration, the key thing to realise is that due to precessional ‘slippage’, with every year that passes, with the earth returning to its next successive winter solstice point, the sun will appear to move eastwards against the seemingly fixed background galactic star field. The actual rate as an angular sweep is determined precisely by the difference between the sidereal year of 365.256363 days and the tropical year of 365.242184 days, which translates into approximately 50.29 seconds of arc per year. From the time of 500 BC, the full angular distance as would need to be covered to place the sun on the exact crossing point of the ecliptic and galactic equator, in conjunction with the earth upon a future winter solstice, is approximately 34 degrees and 35 minutes of arc. It is precisely this angular distance that is covered right up to the date of 2012 AD.