Here's why:
* The moon doesn't produce its own light. It's a giant, rocky body in space.
* Sunlight hits the moon's surface. The moon's surface reflects some of this sunlight back towards Earth.
* We see the reflected sunlight. This is why we see the moon shining in the night sky.
Think of it like a mirror. A mirror doesn't create light, it just reflects the light that shines on it. The moon is like a giant, dusty mirror reflecting the sun's light.
