Here I began with creating stars in the background, and then creating the first and largest planet, and then adding a few glow effects to help give it its shape and begin the lighting effect.
Next I moved onto adding a texture onto the planet, and a small spot of light to again help build the lighting that will finalize the piece.
Now here I start to add the second planet and the appropriate lighting for it, this also has glow effects added to it, but slightly masked towards the back to create the correct lighting effect.
Finally I create a bright spotlight underneath the two planets with a soft brush, this creates a bright light that shows around the edges of the planets to create the source of lighting. To add more fill to the scene, I then added a nebula cloud to the right of the scene with two bright light spots.
