That's correct! A small body revolving around a planet is called a moon.

Here are some other interesting facts about moons:

* Not all planets have moons: Some planets have many moons (like Jupiter with over 70!), while others have none (like Mercury and Venus).

* Moons come in all sizes: Some moons are tiny, while others are larger than the planet Pluto!

* Moons can have different origins: Some moons formed at the same time as their planets, while others were captured by the planet's gravity.

Let me know if you have any other questions about moons!