[klebiokz] Proving ellipticity

Replicate the experiments that proved that each planet moves in an elliptical orbit (as theorized by Kepler) not circular (as theorized by Copernicus).  Quite amazing is that Kepler proved his result using only naked-eye observations by Tycho Brahe and colleagues.

Replicate the experiments that proved that the shape of the earth is an ellipsoid, not a sphere.