Here's why:

* Stars produce their own light: Stars are massive balls of hot gas that produce their own light and heat through nuclear fusion. The moon does not produce its own light, but reflects light from the sun.

* Stars are much, much larger: Stars are immensely larger than the moon. The moon is a relatively small celestial body compared to even the smallest stars.

* Stars have their own gravitational pull: Stars have a much stronger gravitational pull than the moon due to their massive size. The moon's gravitational pull is what causes tides on Earth.

The moon is a natural satellite, orbiting the Earth. It's a rocky, barren world that doesn't have the conditions necessary to be a star.