There is no distinction between a "star" and a "sun." Our Sun is a star.

The term "sun" is often used to refer to our particular star, while "star" is a more general term for any celestial body that emits light and heat due to nuclear fusion in its core.

Here's a breakdown:

* Star: A giant ball of hot gas, primarily hydrogen and helium, that produces light and heat through nuclear fusion.

* Sun: The star at the center of our solar system, providing light and heat to all the planets orbiting it.

So, all suns are stars, but not all stars are suns. We call our star "the Sun" because it's the star that's closest to us and the one that sustains life on Earth.