During a lunar eclipse, what is the penumbra? (1 point)
It is the part of Earth's shadow where the sun is completely blocked.
It is the part of Earth's shadow where the sun is only partially blocked.
It is the part of the moon's shadow where the sun is only partially blocked.
It is the part of the moon's shadow where the sun is completely blocked.
It is the part of Earth's shadow where the sun is only partially blocked.
To answer this question, we need to understand what a penumbra is during a lunar eclipse. A lunar eclipse occurs when the Moon passes directly behind the Earth into its shadow.
During a lunar eclipse, the shadow of the Earth has two parts: the umbra and the penumbra. The umbra is the dark, central part of the shadow where the Sun is completely blocked. The penumbra, on the other hand, is the outer part of the shadow where the Sun is only partially blocked.
Therefore, the correct answer is: "It is the part of the moon's shadow where the sun is only partially blocked."