The Sun
I think the main weakness with this model is the lack of flames protruding from the sun's surface. I'm not quite sure how to properly render that effect yet. . .
Credits:
Map authored by Calvin J. Hamilton, and obtained from www.solarviews.com.
This model uses one map:
Ground Map: Download Page. You need the 2000x1000 TIFF map.
Download the Blender File Here