A common way to do this kind of thing is to apply the CC Sphere effect to an image of the Moon's surface. Because the image has to be shaped just so for this to work, I'd search for 'moon texture' to find a stock image of the Moon. (The term 'texture' refers to a 2D image that is used to wrap or overlay a 3D object.)
Here's a
link to a tutorial and sample project that show how to do this for the Earth. The tutorial rambles a lot; you can probably learn what you need from the example project.