It is probably nothing, but i was watching a nasa apollo documentary on cable and there was footage of a sweep of the moons surface from either a satellite or ship. it was very clear video. al the creators were half shadowed i'm assuming from sunlight direction. i noticed one big creator had a shape inside the dark half that looked like it should not be there, or it should be shadowed like the rest of that half of the creator. i'm not an astrologer so maybe it's nothing, but i attached an iphone picture i took from my tv when i paused the video.