Days become shorter as autumn approaches

Days become shorter as autumn approaches (KTUL)

Fall is known for bringing big changes in the weather as it's the transitional time between our hot, humid summer and our cold winter days.

Something else that sees a substantial change this time of year is daylight.

As Earth's axis begins to tilt away from the sun, the amount of daylight we receive decreases.

From the first day of autumn Sept. 22 to the last day Dec. 21, we lose three hours and 10 minutes of daylight. That has us losing a little more than three minutes each day throughout the season.

Fun fact: Day and night are not perfectly equal on the equinox in Green Country; however, they are pretty close and only off by a few minutes.

Our day of equal day and night will occur Sept. 26 with sunrise taking place at 7:15 a.m. and sunset at 7:15 p.m.

Why does this happen?

Depending on where you live will determine when your "equal day" occurs. The higher the latitude, or the closer you get to the poles, that day happens later than the actual equinox itself.

Another factor is how "sunrise and sunset" are actually defined. The time the sunrise is said to occur is when the upper edge of the sun reaches the horizon with sunset happening when the entire sun is no longer visible. And believe it or not, the sun is actually still visible for a short time when it drops below the horizon, as Earth’s atmosphere refracts the sun’s rays and bends them in an arc over the horizon. But, on the equinoxes, the very center of the sun sets 12 hours after it rises.

So enjoy the sunlight while you can because days are becoming shorter and shorter at a faster rate each day.

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