All planets in our solar system reflect light. They don't emit their own light like stars do. Here's why:

* Planets are not hot enough to emit light. They don't have the internal nuclear fusion that powers stars and generates light.

* They reflect sunlight. The light we see from planets is sunlight that has bounced off their surfaces.

Therefore, while we may see planets because they reflect sunlight, they don't actually emit light of their own.