This textual inversion can make some very interesting results when added to the end of a prompt by saying "in the style of style-nebula" I made it using one image using the dreamartist extension in automatic 1111. I made it so I could make more cosmic and spacelike images. At first I was skeptical of dreamartist because it was just one image but I was impressed by this. I've also found that using style-nebula at the beginning of the prompt can create some intriguing results too.