From your other comments, it seems you intended the planet as a gas giant. Personally I thought it was terrestrial with some sort of massive dust storm in the lower hemisphere. The edges of that dark "storm" seem strangely illuminated, perhaps an additive lighting effect with the rings?
The small moon, the highlighting on the planet, and the detailed nebula are all great looking.
Texture is made using displacement maps - and the map I used didn't exactly give the normal horizontal pattern one would expect from a gas-giants. But instead created some nice vertical storms. Granted it's not the perfect texture, I probably should have post-worked the texture using conventional methods. Was a quick piece though, and I kinda like how the gas-giant came out anyhow
Interesting, I love the stuff you can get from experimenting I wonder if there is a way that storms/clouds like this could form in reality? Of course we only have a handful of gas giant planets to study right now, but who knows....