Here's a breakdown:
* Eclipse: Occurs when one celestial body passes in front of another, blocking its light.
* Umbra: The darkest part of the shadow, where the light source is completely blocked.
* Penumbra: The lighter, outer part of the shadow, where the light source is partially blocked.
During a solar eclipse, the penumbra is the region where the Sun is partially obscured by the Moon. This creates a gradual darkening of the sky, unlike the total darkness experienced within the umbra.
