Ok, this is a new thing for me. I am going to give you all an insight to the production of one of my images that you all seem to have quite liked. This is NOT a tutorial, however I will put links to a lot of the tutorials i have done in the past which contributed to me beng able to do this at the end, its just what i was thinking and doing when I made this:

Ok, the process:

This image was made late one night, when i was mucking arround with a few tools.

The first step, as allways, was the planet, or more importantly, the texture for it. Detailed textures make for good planets, and this one was an experiment in making planets with clouds. Just as a side note, the original texture for this, which i have now used for 3 diffent pictures was about 8 times the size as the whole image above, and while it takes a bit longer, it makes the textures more versitle so you can use them over and over again. Its the first time I have made clouds, and I did it using the render fclounds filter, reducing the brightness and increasing the contrastm switching it to screen, which makes all the black piss off into the land of transparency and all the grey parts go part way. Then using the twirl feature with the circle selection command i made the storm systems. Finished texture in low res:
Ok, to make it look round, you make a circle selection, knock it out usign a mask and then use the function found under Filter>Distort>Spherise set to 100%. After I had finished this iI had my basic planet, in black and white and high resoloution. But it wasn't going to be the starting point for the whole picture.

In actual fact, this image went through sveral versions. First was trying to make my own mountain landscape to put the planet behind, then i was trying to use someone else's photo of mountains I found on the web and taking out the sky and that kind of thing. none of it relly worked, so after putting the planet in the background I moved on to the nebula while i tried to decide what i would do with it later.

The nebula was actually quite easy. I just took a photo of some coluds and mixed it up a bit using the clone stap tool on various opacities. then i grabbed a big soft eraiser, got rid of the edges of most of itand set the whole thing to about 60% opacity. After that, the coloring of it was easy, jsut big blotches of soft colors set to overlay and about 20% opacity, then merging the two layers together as a smart object to stop it interfearing with the stars. Ofcourse there wern't any stars yet, but a little forethought allwasy helps.

Here is what it looke dlike with just that:
As you can see i hadn't added the planet at this point. Normally i would have, but i had a rough idea where the elements of this were going to be, so I didnt bother this time. But i did at the next step. It was just a matter of importing the old psd i had from the start (actualy created for the colision of planets  picture) and keeping it a smart object, then re sizeing it and positioning it. Working with smart objects is useful, as they dont lose quality after you distort and re-distort them.

After that came the rings, which were another experiment using clouds, noise and the twirl effect. these were also made in a diferent doccument , just like the planet, and then imported. The rings were followed by the stars, which took all of 30 seconds as i have done them sooo much for my other projects. ThenI made a new loyer and applied the image to it. This makes it so that you have a flattend, combined copy of all you have done, so you can copy it for the reflection. Here is what it looked like before i put in the water:
Ok, after that it was just a matter of copying the top half to make the bottom half, and then using the displacement filter with a map i had from ages ago.

and that was it, final image done :)

Links:

Planets(not what i actualy did, but a rough idea): http://www.tutorialwiz.com/planet/
Stars (Pro-tip: Repeating this one and adjusting the brighnest/contrast every time will give you a deeper starfield): http://www.tutorialwiz.com/simple_stars/
Water reflection: http://photoshopcontest.com/tutorials/26/displacement-water.html

For more tutorials go to: http://www.photoshoproadmap.com This is the site I find almost all the tutorials I do, and have done, to learn some cool things about photoshop. Anyone can do it!