Art of Blender
The Art of Blender is full of inspiring renderings from Blender artists around the world.
In this Blender 2.5 video tutorial we go through the process of texturing a planet and preparing the scene so we can use the compositor. We then work extensively inside the compositor to take the scene and add rim light to the planet, glare from the sun, and edit the color and contrast of the planet. Some of the textures used in the tutorial are from cgtextures.com