Sun Shadows Only Possible on Flat Earth, Not Globe

Here's why the Eratosthenes experiment said to debunk flat earth and prove the circumference of the globe with shadows is impossible in the heliocentric model. Angles and shadows measured in the Eratosthenes experiment are only possible on a flat earth with a small and local sun. We are told that the sun is massive and projects parallel rays of light to cast shadows on a globe earth, and often used as proof to debunk flat earth. So let's compare the heliocentric model with reality and see what makes more sense.

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