The planets rotate around the sun. The sun rotates around the planets. The planets revolve around the sun. The sun revolves around the planets.
I gave my students this multiple choice question: The solar system containing Earth consists of a sun and planets. Which statement best describes the motion of the planets in our solar system?

Only one answer is correct among these 4 choices:
- The planets rotate around the sun.
- The sun rotates around the planets.
- The planets revolve around the sun.
- The sun revolves around the planets.

Could you tell me which one is correct?

The planets revolve around the sun.