"Autumn doesn't boldly announce its presence but rather creeps in. Since schools are back in session in August and early September, many who consider these last few weeks to be the beginning of fall start consuming pumpkin-flavored treats, even in extreme heat. Astronomical season purists prefer to defer to the position of the sun. This Monday (September 22) marks the fall equinox, which is the official beginning of astronomical autumn."
"The Earth revolves around the sun while simultaneously turning on its own axis at a tilt of about 23.5 degrees. These processes cause different parts of the world to get more sunlight than others, but what goes around comes back around eventually. The Northern Hemisphere experiences winter in December through most of March while the Southern Hemisphere takes its turn June to September. The term equinox is Latin in origin and is loosely translated to "equal night.""
Autumn arrives gradually and many people begin seasonal behaviors like consuming pumpkin-flavored products as schools resume in late summer. Astronomical seasons depend on the sun's position; the fall equinox on September 22 marks the start of astronomical autumn in the Northern Hemisphere. The Earth orbits the sun while tilted about 23.5 degrees, producing varying sunlight and seasons between hemispheres. Equinoxes occur biannually when tilt and orbit align, producing nearly equal day and night. A partial solar eclipse will be visible in parts of New Zealand, Antarctica, and some South Pacific islands, with about 86% of the sun obscured.
Read at Fast Company
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