The moon is blocking the sun and we can't see a thing. Until...

A sudden flash of light! A meteor was heading right for us and we didn't see it! Something made it explode, and for just a second the dark side of the moon was lit up!

We're moving so fast that it's hard to be sure, but are those ruins? It looks like arches and columns on some long dead city built deep in a crater! And did we catch a glimpse of forests? The area looked blue-ish - is there some kind of atmosphere in those deep valleys? Was there once an ancient and advanced race on the moon? Did they die off? Or leave? Or just move underground?

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