The ripples reminded me of waves and the sort of circular blue / white disc reminded me of the moon. Hence the title.
The wallpaper version is available at the preceding link.
Today's Gratitude Item: That Shuttestock finally seem to have started accepting at least some fractal / abstract illustrations. About three months ago, they pretty much rejected everything I submitted saying, in effect "we have too many of these". Whilst I am still far away from those easy 100% acceptance days, they did accept two thirds of my most recent batch which is a fantastic improvement on recent attempts. I guess that a combination of patience and persistence has started to pay off. That and the material I have been submitting is of a higher quality than before. Lets just hope it sells.