Damn if you wrote some nasa code numbers in the bottom left this would go a LONG way before anybody realised it was CG, in fact if it wasn't posted here no one would ever know. This level of realism is actually getting pretty scary. How did you achieve the "swirly-ribbon" clouds across the centre and mid bottom of the image. This is ridiculously good. Mind you 99 hours, thats gotta hurt! Are you planning on sharing the clip or is this for your private collection (certainly wouldn't blame you, you done a heck of a lot of work to get here).
Keep it up
Richard
Ps have you tried this with a sunset shot yet, your getting so close to the ISS image you posted earlier.