Create a Planet
1) Find a picture of the planet you wish to create. I'm going to create the earth as our example.
Here is my picture.
2) Create a symbol in the library
>Insert
>New Symbo
l
Choose Movie Clip.
Name it earth.
Click OK.

You are now in the library. This is where we create symbols.
You know you are in the library since there is a crosshair in the middle of the document.
Create a planet to your liking.
Save your document.