During a tropical year the sun moves from Vernal Equinox to Vernal Equinox. 在一个回归年内，太阳从春分点转回到春分点。
However, in the period we are considering, the sun at the Vernal Equinox had left Taurus two thousand years before, and was in the process of moving from Aries to Pisces. 然而，在我们正在考虑的这个密特拉时期，太阳在春分点上已经抛离了金牛座两千年之久，正在从白羊座到双鱼座移动。
