That is pretty nice sabaa. Thats bad that your grandpa died though.
I like the Vista wallpapers, so i tried to make one in similar style (while trying to somewhat follow a ps tutorial. )
Nice work, it looks good, though the moon is a little transperent on the edges (can see the stars through it) I do not know how hard it is to fix, since i have never made a planet/moon.
Would it be possible that in an upcoming version that there is the ability to save the edit history to a file so that we wouldnt have to restart an image from scratch if we want to change an image that is a pdn file and want to add something to it that requires a layer to be seperate but you merged the layer that you need with another layer? It would make things a lot easier.