Wednesday, October 5, 2022

Solar Calendar

I blogged about this statue back in 2018 ( about the 9/11 inscribed on its back side, but until recently did not realize that the front side, shown below, is a type of solar calendar.  Every September 11th at noon, assuming it's sunny, the shadow cast by the stylus near the top lines up in the center of the red vertical bar.  This picture was taken a couple weeks after September 11th and an hour or so after noon, so its shadow is bent to the left of the bar.  

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