When Luna's family visits the Great Wall of China, they are all amazed to see just how big the wall really is. It's so big you can probably see it from outer space! Which gets them wondering... is it possible to see buildings and things like the Great Wall of China from outer space? Luna, Jupiter, and Clyde have just gotta know. Learning Objectives: Discover whether man-made structures can be seen from space, particularly the Great Wall of China.