What is this star constellation thing called?

I remember there's this thing that has star constellations on it, and if you turn the circle around, onto the current date and time, it shows you what constellations you should be able to see through this see through panel. It's all made of paper, because I've made it before at school.

But I've forgotten what it is called! Please help me! Does anyone know what it is called?



Please %26amp; Thanks very very very much!! :3What is this star constellation thing called?It is called a planisphere.What is this star constellation thing called?Its called a planisphere - if you can find one these days - a planetarium program such as Stellarium would be more usefulWhat is this star constellation thing called?The plastic/paper disc is known as Planisphere.What is this star constellation thing called?
How about this?



http://www.marcsobservatory.com/starfind鈥?/a>



Its not exactly like the one I had as a kid but it will do. They call it a starfinder.