For a text around the planet I would use the pen tool. Have you got any idea how this works? Make a selection of your planet layer, then with one click you can turn it into a path. After this just grab your text tool and the text will follow the path! 
For the rings, that won't be that easy. Probably you can try to create a path using the pen tool which looks like a ring? 
Try the text one first and report how it goes. If you got any questions I'm sure there are several people who can help you.