Well here is my vision of our new planet (if and when we find it). It's kinda stormy there, but we may be able to live there someday. :) I hope you like it.
Cool image. I am fairly new to photoshop, and am still learning all the techniques. My suggestion, maybe add some stars in the background, or some colour to create a nebula. I really like the texture of your planet and the cloud swirls. I am not fond of the glare from the lens flare. I usually remove it in my images. Also, I would have made the planet a little smaller. Other than that, it's great. Keep experimenting!
Or or...(see my pic for an example...a bad example). I used these tutorials to make the "stuff." And of course i skip steps which is why it comes out boring. :-)