Here's the breakdown:
* The Sun is at the center of our solar system. The Earth, along with all the other planets, asteroids, and comets, orbit around the Sun because of its massive gravity.
* Orbits happen when one object is pulled by the gravity of another, heavier object. The heavier object stays relatively still, while the lighter object circles around it.
* The Sun is the biggest and heaviest object in our solar system, so everything orbits it.
Let me know if you have other questions about space!