Here's why:

* Large celestial body: Stars are massive, composed mostly of hydrogen and helium.

* Orbiting the Sun: Stars are not orbiting the Sun. They are the central objects around which planets, including our own, orbit.

* Makes its own light: Stars generate their own light and heat through nuclear fusion, a process where hydrogen atoms fuse to form helium, releasing immense amounts of energy.

Let me know if you have any other questions!