Photorealistic Earth Attempt

Hello everyone! This is my first post on blenderartists, documenting a WIP render of Earth using Cycles. I used textures from NASA’s Blue Marble site: http://visibleearth.nasa.gov/view_cat.php?categoryID=1484

The atmosphere shader is setup as follows:

I followed the method used at this link but slightly modified some of the numbers to fit the model size:

Here is a simple breakdown of the render as it currently stands:
[video]https://youtu.be/tU3GC-GS_FE[/video]

Feel free to offer any criticism or suggestions!

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