Here's why:

* Gravity: The Sun has a much larger mass than any of the planets in our solar system. This means it has a stronger gravitational pull.

* Orbit: The planets in our solar system are held in orbit around the Sun by its gravitational pull. They are constantly moving, but they are held in place by the Sun's gravity.

* Center of Mass: While the Sun is much larger than the planets, the entire solar system actually orbits around a point called the center of mass. This point is located inside the Sun, but not at its exact center because of the influence of the planets' gravity.

So, it's the planets that travel around the Sun, not the other way around.