This planet is about to crack… uhh… to explode… See how you can drive a planet crazy…

First of all, create a 400×400 new page. I chose this size, but you can use no matter what size.

We need a sky now. Fill the entire area with black, using rectangular select and bucket fill. Now, add some noise (I feel like a DJ :D ). You can get there using Filter/Noise/Add Noise. Use around 100%, uniform, monochromatic.

The image will look like this: