Saturday, September 23, 2023

Astronomical Arrival of Fall

September brings us another astronomical event - the equinox - when day and night will be approximately equal in length. For those of us in the Northern Hemisphere, this marks the tipping point where the sun will rise later and nightfall arrives sooner.  As things have grown cooler around these parts you don’t have to remind me that there has been a whiff of autumn in the air. 

Equinox (Latin for equal night) the amount of daylight is nearly equal to the hours of darkness. 
 
Even though the equinox happens at the same moment worldwide the precise time for you depends-upon your time zone. Translation: this equinox arrived early today, September 23, at 1:50 AM CDT.   Meanwhile - south of the equator - spring has begun. 

It has been interesting to observe the transit of the setting sun as it has moved from its furthest advance to the north to now set in the west.  The sun only rises due east and due west on two days of the year - The spring and fall equinoxes.

Sunrise today.....

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