Syene lies directly under the summer solstice sun.
Calculated Earth's circumference
Key observation for his Earth circumference calculation.
c. 240 BCE
Found in 1 providers: grok
Cross Reference
1 source
"The Earth is a sphere, and its circumference is 250,000 stadia."
Strange & Unusual"I have found a way to measure the size of the Earth with considerable accuracy."
Strange & Unusual"I write poetry, history, and mathematics."
Strange & Unusual"The circumference calculation was based on principles of geometry and astronomy."
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