Why do people say the Moon is made of cheese?They really don’t think the Moon is made of cheese but it certainly looks like it is sometimes. It looks like it is full of holes just like Swiss cheese. These holes are actually craters that were caused by asteroids. Asteroids are big chunks of rock and ice that fly through space. Sometimes the Moon even has a bluish-green color like Gorgonzola cheese. This color is caused by Earth’s shadow as it moves across the Moon’s surface.