In a solar or lunar eclipse, the region of the Earth`s shadow is divided into three parts. During a solar eclipse, the Moon passes between the Sun and the Earth, casting a shadow on the Earth. This shadow is divided into three regions: the umbra, the penumbra, and the antumbra. The umbra is the dark central region where the Sun is completely blocked, resulting in a total solar eclipse. The penumbra is the lighter surrounding region where the Sun is only partially blocked, causing a partial solar eclipse. The antumbra is an outer region where the Sun appears as a ring, resulting in an annular eclipse. During a lunar eclipse, the Earth blocks the Sun`s light from reaching the Moon. The Earth`s shadow on the Moon also consists of three parts: the umbra, where the Moon is fully immersed in shadow and appears red during a total lunar eclipse, the penumbra, where the Moon is partially in shadow, and the antumbra, an outer region where the Moon is only partially covered.