Photographers use Star Filters sometimes to really make the highlights stand out, but if you do not have one you can use GIMP to reproduce the effect.
Star Filter Effect in GIMP
This photo manipulation is called a stereographic projection, which takes a standard photograph and stretches it around in a circle creating a Globe or Planet like image!
Planet Photo Manipulation in GIMP
This is a very simple method to making photographs grungy, but its also a good technique to have handy in your mind for any post-processing you might do in the future!
The finished JPEG
If you don’t have a zoom lens or you’d like to manipulate a certain image in this style then this tutorial for GIMP should help you achieve a similar effect!
The final result!