The moon doesn't actually give off its own light. It reflects sunlight. Here's how it works:

* Sunlight: The sun is a massive star that emits light and heat.

* Reflection: The moon's surface is covered in dust and rock that are rough and uneven. When sunlight hits these surfaces, it bounces off in all directions. This reflected light is what we see as moonlight.

* Phases: The moon's phases are caused by the changing angles at which we see the sunlit portion of the moon as it orbits the Earth.

In short, the moon acts like a giant mirror, reflecting sunlight back to Earth.