This is just a beginning to this. I'm planning to add a little more to the terrain on the green planet, such as a surface layer of snow or some water, or some canyons, or something. The far planet has distorted terrain. The displacement was medium, the noise flavor was perlin ridges, the lead-in scale was 5e+007, and the feature scale was 100,000. Displacement roughness was also increased.
Also planning to add some clouds to this picture ...
Comments welcome.