1. He then accounts for the precession of the equinoxes.

2. It is due to a phenomenon called the precession of the equinoxes.

3. However, due to the precession of the equinoxes, this point is no longer in the constellation Aries, but rather in Pisces.

4. This was done with the help of astronomy software to render the night sky of the characters' location, in their specific time, accounting for projected precession of the equinoxes and stellar motion over the next 11,000 years.