This project is to be completed during all the unit of Solar System.
You might want to complement it with videos and Power Points, or any other source of information, because the idea is for students to take notes of thing that catch their attention about the Sun and Planets, and in the end they just colour and "build" the fact fan. If you want students to research, this is also a perfect project to get students started on it, but it needs to be really guided and give them the sources of information, to make sure they are reliable.
My 3rd graders really enjoyed this project, they learnt to take notes and they also acquired more autonomy.

They way I did it, was that I gave them 2 options: The fact fan (this project) and also a mobile (that is also uploaded) and they chose the one they wanted to do. Both booklets are organized in such a way that students have to do exactly the same thing in both, but the "format" of the final project changes. Students were also very enthusiastic about having the option to choose their final project.