This was an old drawing I did online a few years ago. It was at the website called Sketchfu (closed about five years ago). I’ve always loved astronomy and this was a good challenge to try and get a reasonably accurate drawing using very simple tools. The hardest thing was getting the image blurred enough to feel realistic. Colours were chosen from a couple of hundred choices. There were only five sized circular pens and a slider to alter the opacity. Plus an eraser to clear away mistakes. You could add layers so you could show your progress, or do a collaboration with other artists, the only real problem was the images took ages to load.