Remember we learned that a planetary system is a star
with a bunch of planets spinning around it, like our solar system.
There are also stars out there that have other stars spinning around them!
We call those star systems
![star system](https://upload.wikimedia.org/wikipedia/commons/thumb/c/c7/HD_98800.jpg/600px-HD_98800.jpg)
(from: wikipedia - star system)
So far scientists have only discovered star systems with up to 7 stars in them.
Kid Facts - Blast from the past: Solar System