I had started dabbling with an idea for the October challenge, that needed a moon.

After searching high and low for decent images, then wasting an hour looking for dem data, I resorted to POVRay and got the three following variants...

Just using a texture map (wrinkles and granite pigment maps):
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ID:	17773

The same with a wrinkles and granite bump map:
Click image for larger version. 

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The same pigment, but with an rendered isosurface (mathematically combining a sphere with the wrinkle and granite pigments converted to functions):
Click image for larger version. 

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I couldn't believe the improvement with the isosurface over normal rendering (but the rendering time confirmed the additional detail!)

All thee used a POVRay include file I found called RealSky (down at the bottom) that has all the stars visible to the human eye.

And since I am posting in the Elements forum, here is one with a transparent BG to use as you please:
Click image for larger version. 

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-Rob A>