jamw on Nostr: It’s called knowing when noon was on the summer solstice when the sun was directly ...
It’s called knowing when noon was on the summer solstice when the sun was directly overhead (June 21). So at this time of day there was no shadow cast by the obelisk at Syrene. At the next summer solstice at noon you do the same thing at Alexandria, but this time a shadow is cast at 7 degrees. The rest is simple maths.
Published at
2025-01-14 15:17:35Event JSON
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