Thanks for the help, but the explanations are too advanced...not enough detail.

For the moon, by texture filtering do you mean apply a 2D image map to diffuse_color, select the moonmid.jpg as the image, where it has filtering at the bottom make it none, the part about normals forward and minimum displacement bounds .01 I don't understand.

Does that mean also connect Displacement to the image map, and turn it to .01?

Then check the normals_forward box?

When I do all those things it comes out in render not looking a lot like the moon, although the image is applied.

For the Earth the best I can do is get it to come out a blue sphere with yellow lines.  I do see there are two materials, the surface and the atmosphere.  But when I apply a texture (image) it just renders as a sphere with yellow lines.