I wasn't going to say anything...

I think you could've made your coloring a little more solid on the "night" side. However, the "sunset" side looks very nice.

Here's a little tip for drawing clouds. We all know clouds aren't solid objects, right? So don't give them an outline. Draw them as the gases that they are, and give them a little shadow. They'll look very lifelike. Also, they are usually white, not see-through. ;)