Here's why:
* Stars are massive balls of hot gas that undergo nuclear fusion in their cores. This fusion process releases enormous amounts of energy, which manifests as light and heat.
* Planets and moons are much smaller and do not have the mass or internal processes to create their own light. They are primarily visible because they reflect light from the star they orbit.
Think of it like this:
* The sun is like a giant, glowing light bulb. It's the primary source of light in our solar system.
* The Earth and Moon are like mirrors. They don't produce their own light, but they reflect the sun's light.
So, while we see planets and moons because they reflect starlight, the light they reflect doesn't originate from them. It originates from the star they orbit.
