Happy Equinox

Tomorrow is the first day of fall...well, at least from an astronomical sense. Astronomical fall begins on the day the Sun passes directly over the equator. On this day, the Sun will rise directly in the East and set directly in the west (if you live on an east-west street, watch the Sun rise and set at the end of your street!)

For meteorologists, however, fall is old news. Meteorologists define fall as the months of September, October and November.

Oh, and you can forget the nonsense about standing eggs on end on the equinox. Today's Astronomy Picture of the Day takes on that with with Phil Plait standing eggs on end on a random day in October.