Hey Doug,
sure, here is my exported layered material for the planet: SkyBoxPlanetMaterial.zip (6.43 KB)
Kudos to ryanjon2040 who posted the original planet material here in the forum. If you want to see it in action you will need suitable textures for the planet, e.g. from here.
This is the blended material:
Note that it is unlit, so it only shows the emissive attribute from its layers. The layers (day/night) are blended depending on a vector parameter which represents the light source.
This is one of the layers, note that it only outputs to the emissive color attribute.