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1. Earth's shadow on the moon (at lunar eclipse) is always circular.

2. The position of the sun and the stars depends on the position on earth, thus earth has to be curved.

3. Magellan sailed around Earth.

4. Yuri Gagarin orbited Earth in space.

5. Pictures of Earth taken from the Moon impressively demonstrate the shape of Earth

6. The rotation of Earth can be proven with Foucault's pendulum

7. Astronomical observations show that all the other planets are spheres, it is very likely that the Earth is a sphere too

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Q: What are six different proofs that the shape of the earth is a sphere?
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