Explain how the shading of the direct light of the sun causes a lunar eclipse.

The lunar eclipse happens when the Moon goes through the Earth's shadow. Earth dependably has a shadow, which is made by the Sun. On those uncommon events when the Moon, Earth and the Sun are altogether arranged perfectly, the Moon goes through this shadow. This would happen each full moon if the Moon circled around the Earth in an indistinguishable plane from the Earth circles around the Sun.