Distance to the Sun
Q. Why are the celestial bodies and the sun so close to the earth's surface in the Flat Earth Model?
A. The celestial bodies must be close because if the shape of the earth changes, the distance to the celestial bodies must change as well. Astronomers use two different observations on far off points on earth to triangulate the distance of celestial bodies. When the shape of the earth changes, the triangulation changes, and our perception of the universe must therefore change as well.
Eratosthenes' stick experiment can not only tell us about the size of the earth, but can also be used to compute the distance to the sun as well. If the earth is round, the celestial bodies are computed to be millions of miles distant. If the earth is flat, the celestial bodies are triangulated to be relatively close to the earth's surface.
In his experiment Eratosthenes assumes that the earth is a globe and that the sun is very far away in his computations for the size of the earth and the distance to the sun. However, if we use his data with the assumption that the earth is flat we can come up with a wildly different calculation for the distance of the sun, showing it to be close to the earth. The sun changes its distance depending on the model of the earth we assume for the experiment.
Millersville University goes over the two ways of interpreting Eratosthenes' data. The first part of the article goes over the interpretation of his data under a Round Earth model, and the bottom part of the article goes over an interpretation of the data under a Flat Earth model.
Here's a link which explains the idea: http://www.millersville.edu/physics/experiments/058/index.php. The first part goes over the Round Earth explanation for how the sun can be computed millions of miles distant. At the bottom there is a Flat Earth explanation for how the sun can be computed as being very close to the earth's surface. Scroll all the way to the bottom to the "alternative mo…