Starship Asterisk*

Interesting picture, interesting discussion, and, yes, quite appropriate for this site. It's an astronomy picture. A bit different than close-ups of celestial objects, but I for one welcome seeing it and learning from it. And thanks MarkBour for explaining the methodology of acquiring this photo. I ...

And for each lunar eclipse on the earth there is a concurrent solar eclipse on the moon.

My question is about umbra vs. penumbra. Isn't the reddish portion of the picture the umbra - where the only earthlight is diffused thru our atmosphere? And isn't the lighter gray and larger shadow the penumbra, where some direct sunlight peaking around the earth's limb is hitting the moon, hence th...