Also this quick one from Google: "If the world had been flat, then two sticks in different locations would produce the same shadow: But they don't. This is because the earth is round, and not flat: Eratosthenes (276-194 BCE) used this principle to calculate the circumference of the Earth quite accurately."
I'm not sure if I've seen an explanation for this one yet... I'm so tired.
This is possible in several configurations. We show one here of the infinitely many possible ones. It was calculated by Rowbotham and again by others later - and it shares similarity with the model calculated by Taoist scholars:
Let's compare them.
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Using FLAT assumption as starting point for measuring Sun's
height above the ground,
and measuring at the moment during equinox when the Sun is
directly above Mbandaka, Congo,
(say, noon in Mbandaka on March 20th)
observer from Koro Toro, Chad will measure 3851 mile,
observer from Brestovac, Croatia will measure 3095 miles,
observer from Upsala, Sweden will measure 2401 miles.
(Observer from north pole will measure zero.)
~~~~~
Using GLOBE assumption we get measurements that can be described as Ill-Conditioned System,
and can conclude that Sun is many times farther than the diameter of the Earth.
(At distance of 4000 miles between two almost parallel lines towards Sun from different spots on Earth
angle of 0.0024 degrees would give 95 million miles, angle of 0.0025 degrees would give 91 million.
That is roughly 4 million miles of difference.
Only error margin is about 500 times bigger than Earth's diameter.)
But Globe allows us to see Venus as existing planet.
We need the size of the orbit of Venus, distance between Earth and Venus (it was measured by radar)
in the moment of greatest angular elongation between Veus and Sun,
and then we calculate those 93 million miles to the Sun.
Like
THIS.
~~~~~
Which one do you think describes reality better?