The darkest part of the moon is called the Umbra. That is the darkest not the largest.
the darkest part of the moon's shadow is called the umbra
The darkest part of the moon is called the Umbra. That is the darkest not the largest.
The darkest, "total" shadow is called the "umbra", while the partial shadow is called the "penumbra", from the latin prefix "pen" meaning "almost".
The darkest portion of the Moon's shadow during a total solar eclipse is called the umbra. It is the region where the Sun is completely blocked and only the Moon's shadow falls on Earth, creating the darkest point of the eclipse.
The darkest portion of the Moon's shadow during an eclipse is called the umbra.
penumbra
The shadow cast by the moon on Earth during a solar eclipse is called the umbra. This is the central, darkest part of the shadow. Surrounding the umbra is a lighter shadow called the penumbra, where only a partial eclipse is visible.
I think you are asking what is the lighter part of the Earth's shadow on the Moon that surrounds the darkest part. The penumbra is this lighter part of the shadow. The darkest part is the umbra.
Sunspot
When you are in the moon's shadow during a solar eclipse, it is called the umbra. This is the central, darkest part of the shadow where the sun is completely blocked by the moon. Outside of the umbra is the penumbra, where the sun is only partially blocked, resulting in a partial eclipse.
umbra
The dark shadow cast by the Earth on the Moon during a lunar eclipse is called the umbra. This is the central and darkest part of the shadow where the light from the Sun is completely blocked.