This is the most awesome tutorial I've seen here, and i have seen a lot (as a guest, not as a member of the forum)... and this is my try http://prntscr.com/9jga2 I combined it with jerry's Sun Tutorial http://forums.getpai...4-sun-tutorial/ plus I did a little change with the clouds, I duplicated the layer and inverted the colors in the bottom one, so it gave it a little gray in some spots... I also added a little shadow, which may or may not made it cooler
Oh and Excelerate, thanks for the idea for the for a dying planet
http://prntscr.com/9jggb
I just adjusted Sepia to the shores and water and instead of a blue color scheme I used red
EDIT:
I just made this http://prntscr.com/9jph0 with a moon based on your planet... just changed some colors and gave it a little detail and voila