The dark, inner shadow of planet Earth is called the umbra. Shaped like a cone extending into space, it has a circular cross section most easily seen during a lunar eclipse. For example, on January 21 the Full Moon slid across the northern half of Earth’s…
http://myfusimotors.com/2019/01/26/the-umbra-of-earth/
I was wondering about that red light. The shadow part of the moon goes completely black for awhile then suddenly lights up red when all the silver is gone, then goes black again as the silver returns. I have also seen the waxing moon soon after new moon take on the same pale orangey glow. It must relate to a specific angle of sun, earth, and moon, to get that red light on it.
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