Monday, September 23 marked the first official day of autumn as the Autumnal Equinox took place early in the morning (3:50 A.M. to be exact).
To understand the Autumnal Equinox and how seasons work, we must look at how Earth is oriented relative to the sun.
The Earth is tilted on its axis and that tilt gives us seasons. The tilt causes different parts of the Earth to receive less or more sunlight depending on the time of the year.
During the Autumnal Equinox, Earth’s axis is tilted neither toward nor away from the sun, giving equal amounts of daylight and darkness at all latitudes.
After the Autumnal Equinox, we start to see less daylight hours than we see hours of darkness in the northern hemisphere. The opposite is true for the southern hemisphere, as they will start to see shorter nights.