That paragraph makes no sense at all...
Sure it does. In the sky you can see a tiny speck of moon on that mountain-like shadow, on that moon you can see an itsy-bitsy shadow of the earth. See it? Want my magnifying glass? LOL
Scientists are odd folk.
The sun is setting behind the photographer. It’s low enough for the mountain to cast a shadow in the sky. The partially eclipsed moon is visible in the shadow. Part of Mauna Kea is visible in the foreground.