Curve of the Earth

Aim

Show the curve of the Earth

Observation 

With a flat Earth, same shadow in Alexandria and Aswan

With a curved Earth: a shadow in Alexandria and no shadow in Aswan

Production

Photographies of both observations

Material

Egypt Map.pdf

Pedagogical module

Carl Sagan "Cosmos" Episode 1 (1980)

Simulation with Geogebra: https://www.geogebra.org/material/iframe/id/gapz82mc