The Autumn Equinox is Saturday 9/22 when the Sun enters Libra at 3:41 pm EDT. At this time the Sun will oppose the Aries point (a powerful point of beginnings) and enter into the Pluto/Uranus square – which Mercury did this week. One of the Sabian symbols associated with this is, “Light breaking into many colors as it passes through a prism.” It is best to stay open to the meaning of events as they occur as it is likely that their ultimate meaning (where they are leading) will be more accurately ascertained through hindsight.
Sabian Symbol reference from Lynda Hill’s 360 Degrees of Wisdom.