* The Moon is a solid body: It's made of rock and dust. Light can't pass through solid objects like it can through air or water.
* Reflection: When light hits the moon, it gets reflected back into space. That's why we see the moon – we're seeing sunlight bouncing off its surface.
Think of it like a mirror: you don't see through a mirror, you see the reflection of the light coming from behind you. The moon acts like a giant, rocky mirror in space!