Originally Posted by 2000SilverBullet
You know that redish shadow is the earth'* shadow.
That'* not quite accurate. The reddish glow is sunlight refracting through Earth'* thin atmosphere, and is red for the same reasons the setting sun is red, but the sky is blue. Blue light scatters more, red light wavelengths scatter less.
The Earth'* shadow has no color and no light. The umbra shadow is larger than the Moon, and while the Moon is in the umbra shadow the only significant light that can reach it is sunlight bending through Earth'* atmosphere.
Which is pretty cool.