During a lunar eclipse what is the penumbra

Question

it is the part of the moon's shadow where the sun is only partially blocked

Answer 1

Yes, that's correct! During a lunar eclipse, the penumbra is the outer part of the Earth's shadow where the sunlight is only partially blocked. When the Moon passes through this region, it experiences a subtle shading, leading to a partial dimming of its surface. In contrast, the umbra is the inner, darker part of the shadow where the Sun is completely obscured, resulting in a total lunar eclipse if the Moon enters this region. The penumbral eclipse is often more difficult to observe compared to the more dramatic umbral phases.