This highly detailed 3D Earth is ready to be included in any Cycles scene!
It's custom shader is very versatile and can be quickly edited to suit your purposes. The Earth's transition between day and night is directly controlled by the sun's rotation, which makes animation a breeze. High resolution color, specular, bump, and cloud texture maps are included. The day color map and the bump map is 21600 x 10800, the night color map and cloud map is 8192 x 4096, and the specular map is 10800 x 5400. They can be used as-is or swapped out with custom textures in order to easily create your own planet!