jpeg compression does not turn in the camera lens, as the Hale crater images do. If you go to the ESA site to download more than one photo, you will see the crater image taken at a different angle, and at different times. The "artifacts" have stayed motionless, following the contours of the crater floor, regardless of angle. Jpeg compression is random and would appear so on two different prints. I have worked 20 years in desktop pre-press and have not seen anything of that degree in my photos.