Question

How does the following prove the circular shape of the earth:

Lunar Eclipse

Answer 1

Lunar Eclipse proves the Earth's circular shape because during a lunar eclipse, the Earth’s shadow is cast onto the Moon. The shadow appears round, which indicates that the Earth is spherical.

This happens because when the Earth is positioned directly between the Sun and the Moon, its shadow is projected onto the Moon's surface. Since the Earth is round, the shadow it casts is always circular. If the Earth were flat, the shadow would have a different shape, not a round one, as it would not consistently be able to cover the Moon in this way.

Thus, the round shadow during a lunar eclipse provides strong evidence for the Earth’s spherical shape.