The Sun.

Image by Dennis Nilsson.

In 3000 BC, the angle of the Earth to the sun was slightly greater than it is now.

Now, the angle of the ecliptic is inclined from the celestial equator by 23.4 degrees. This is known as the obliquity of the ecliptic.

In 3000 BC the angle was closer to 24 degrees.

This means that every 833.3 years, the angle changes by 0.1 degree.

In one year, the earth travels compleatly around the sun.
The angle of the ecliptic causes the sun rise position change from a maximum northerly (at summer solstice) to a maximum southerly position at midwinter.

At the equinox the sun rises 'on the equator', that is to say, the sun rises in the east and sets in the west.

East-west is half way between north and south.

The analemma.

What difference does this make to sun rise positions?

In 3000 BC  at Midsummer the sun would rise a little higher than it does now and as a consequence, sun rise would be a few degrees (azimuth) further to the north-east.

Using a star image from midsummer solstice this year, and drawing a line down from a star at 24 degrees (Alcyone) you can see that the sun is as much as half a disc size further to the north.

And again using Alcyone as my guide.

The position of the Sun as it sets is changed just a little, to this position.