lol! nailed it!
>muh CIA psyop
If there was a flat earth, you wouldn't be able to watch the sun go UNDER the horizon every day.
The assumptions made in that math is wrong.
The distance shown is a straight line, when it is not. It is a sub-section of a great arc, i.e. 31 miles along a curve. Apart from the fact the Earth's shape is an oblate spheroid, etc, etc…
At least understand the math you're trying to use to prove something, rather than dumping figures into a website and believing what it says.
No seriously?
You know the stars to precede over the course of generations, and is precisely why some historians can use it to work out historical events.
How you can be the first person to PROVE to the world the Earth is FLAT:
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Go to the Southern hemisphere.
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Photograph the Polaris star in a round photo like the one you posted.
If you're genuine, you'll stop shilling. If you're a glownigger shillbot you'll continue in the next bread.