The fourth step] Select the white part with the Magic Wand tool, then select-Feather, feather around 10 pixels, then perform the image-adjust-color balance and adjust to yellow.
[Step Fifth] Click on the layer 1 copy to select the light in the blending properties.
[Sixth] Add some layer styles to the Layer 1 copy, two layers are spherical, if you can't see clearly, adjust the image of Layer 1-adjust-brightness/contrast, there will be three-dimensional feeling oh ~
Method 2 (Cloud is not a special reality):
When you do [step two], all two layers perform filters-render-layered clouds, and the land is really like.
If you're going to draw another planet, you don't have to repaint it, just perform a filter-render-layered cloud on the layer 1 copy, you can add halo, satellite, Space Shuttle,
Space station, comet, spaceship, alien ... I believe you do better than me!