This is the time when the sun crosses the Earth's equator moving south.
Everywhere on Earth (except at the poles), day and night are the same length
(12 hours). In the Northern Hemisphere, this is the beginning of fall.
globe at the bottom shows the Earth in relation to the sun on
the fall equinox. The
Earth is not tilted toward or away from the sun.
The image below shows where the sun's most direct rays hit on
After the fall equinox, those strong direct rays will begin to
move south of the equator.
North America will receive fewer and fewer hours of sunlight.