This application is a test of knowledge about the Solar System.
It is
divided into three levels of difficulty.
In this trivial, each level proposes 10 questions.
Added the possibility of challenging a friend to beat your score!
![The Planets of our Solar System Song [UPDATE] (featuring The Hoover Jam) screenshot 3](https://i.ytimg.com/vi/RvfVTPYw-kA/mqdefault.jpg)
9Apps 4.9
