Here's why:

* Star: The central object in a solar system is a star, which provides light and heat. Our Sun is the star in our solar system.

* Orbiting Objects: Planets, moons, asteroids, comets, and other smaller objects orbit the star.

* Our Solar System: Our solar system includes the Sun, eight planets (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune), dwarf planets (like Pluto), and countless other objects.

So, when you see the term "solar system," it refers to a star and everything that revolves around it.